// Copyright 2019-present Facebook Inc. All rights reserved.
// This source code is licensed under the Apache 2.0 license found
// in the LICENSE file in the root directory of this source tree.

// Code generated by ent, DO NOT EDIT.

package entv2

import (
	"context"
	"errors"
	"fmt"
	"sync"
	"time"

	"entgo.io/ent"
	"entgo.io/ent/entc/integration/migrate/entv2/blog"
	"entgo.io/ent/entc/integration/migrate/entv2/car"
	"entgo.io/ent/entc/integration/migrate/entv2/conversion"
	"entgo.io/ent/entc/integration/migrate/entv2/customtype"
	"entgo.io/ent/entc/integration/migrate/entv2/group"
	"entgo.io/ent/entc/integration/migrate/entv2/media"
	"entgo.io/ent/entc/integration/migrate/entv2/pet"
	"entgo.io/ent/entc/integration/migrate/entv2/user"
	"entgo.io/ent/entc/integration/migrate/entv2/zoo"
)

const (
	// Operation types.
	OpCreate    = ent.OpCreate
	OpDelete    = ent.OpDelete
	OpDeleteOne = ent.OpDeleteOne
	OpUpdate    = ent.OpUpdate
	OpUpdateOne = ent.OpUpdateOne

	// Node types.
	TypeBlog       = "Blog"
	TypeCar        = "Car"
	TypeConversion = "Conversion"
	TypeCustomType = "CustomType"
	TypeGroup      = "Group"
	TypeMedia      = "Media"
	TypePet        = "Pet"
	TypeUser       = "User"
	TypeZoo        = "Zoo"
)

// BlogMutation represents an operation that mutates the Blog nodes in the graph.
type BlogMutation struct {
	blog.Mutation
	config
	id       *int
	done     bool
	oldValue func(context.Context) (*Blog, error)
}

var _ ent.Mutation = (*BlogMutation)(nil)

// blogOption allows management of the mutation configuration using functional options.
type blogOption func(*BlogMutation)

// newBlogMutation creates new mutation for the Blog entity.
func newBlogMutation(c config, op Op, opts ...blogOption) *BlogMutation {
	m := &BlogMutation{
		Mutation: *blog.NewMutation(op),
		config:   c,
	}
	for _, opt := range opts {
		opt(m)
	}
	return m
}

// SetID sets the value of the id field. Note that this
// operation is only accepted on creation of Blog entities.
func (m *BlogMutation) SetID(id int) {
	m.id = &id
}

// ID returns the ID value in the mutation. Note that the ID is only available
// if it was provided to the builder or after it was returned from the database.
func (m *BlogMutation) ID() (id int, exists bool) {
	if m.id == nil {
		return
	}
	return *m.id, true
}

// withBlogID sets the ID field of the mutation.
func withBlogID(id int) blogOption {
	return func(m *BlogMutation) {
		var (
			err   error
			once  sync.Once
			value *Blog
		)
		m.oldValue = func(ctx context.Context) (*Blog, error) {
			once.Do(func() {
				if m.done {
					err = errors.New("querying old values post mutation is not allowed")
				} else {
					value, err = m.Client().Blog.Get(ctx, id)
				}
			})
			return value, err
		}
		m.id = &id
	}
}

// withBlog sets the old Blog of the mutation.
func withBlog(node *Blog) blogOption {
	return func(m *BlogMutation) {
		m.oldValue = func(context.Context) (*Blog, error) {
			return node, nil
		}
		m.id = &node.ID
	}
}

// Client returns a new `ent.Client` from the mutation. If the mutation was
// executed in a transaction (ent.Tx), a transactional client is returned.
func (m BlogMutation) Client() *Client {
	client := &Client{config: m.config}
	client.init()
	return client
}

// Tx returns an `ent.Tx` for mutations that were executed in transactions;
// it returns an error otherwise.
func (m BlogMutation) Tx() (*Tx, error) {
	if _, ok := m.driver.(*txDriver); !ok {
		return nil, errors.New("entv2: mutation is not running in a transaction")
	}
	tx := &Tx{config: m.config}
	tx.init()
	return tx, nil
}

// IDs queries the database and returns the entity ids that match the mutation's predicate.
// That means, if the mutation is applied within a transaction with an isolation level such
// as sql.LevelSerializable, the returned ids match the ids of the rows that will be updated
// or updated by the mutation.
func (m *BlogMutation) IDs(ctx context.Context) ([]int, error) {
	switch {
	case m.Op().Is(OpUpdateOne | OpDeleteOne):
		id, exists := m.ID()
		if exists {
			return []int{id}, nil
		}
		fallthrough
	case m.Op().Is(OpUpdate | OpDelete):
		return m.Client().Blog.Query().Where(m.Predicates()...).IDs(ctx)
	default:
		return nil, fmt.Errorf("IDs is not allowed on %s operations", m.Op())
	}
}

// OldOid returns the old "oid" field's value of the Blog entity.
// If the Blog object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *BlogMutation) OldOid(ctx context.Context) (v int, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldOid is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldOid requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldOid: %w", err)
	}
	return oldValue.Oid, nil
}

// OldField returns the old value of the field from the database. An error is
// returned if the mutation operation is not UpdateOne, or the query to the
// database failed.
func (m *BlogMutation) OldField(ctx context.Context, name string) (ent.Value, error) {
	switch name {
	case blog.FieldOid:
		return m.OldOid(ctx)
	}
	return nil, fmt.Errorf("unknown Blog field %s", name)
}

// CarMutation represents an operation that mutates the Car nodes in the graph.
type CarMutation struct {
	car.Mutation
	config
	id       *int
	done     bool
	oldValue func(context.Context) (*Car, error)
}

var _ ent.Mutation = (*CarMutation)(nil)

// carOption allows management of the mutation configuration using functional options.
type carOption func(*CarMutation)

// newCarMutation creates new mutation for the Car entity.
func newCarMutation(c config, op Op, opts ...carOption) *CarMutation {
	m := &CarMutation{
		Mutation: *car.NewMutation(op),
		config:   c,
	}
	for _, opt := range opts {
		opt(m)
	}
	return m
}

// ID returns the ID value in the mutation. Note that the ID is only available
// if it was provided to the builder or after it was returned from the database.
func (m *CarMutation) ID() (id int, exists bool) {
	if m.id == nil {
		return
	}
	return *m.id, true
}

// withCarID sets the ID field of the mutation.
func withCarID(id int) carOption {
	return func(m *CarMutation) {
		var (
			err   error
			once  sync.Once
			value *Car
		)
		m.oldValue = func(ctx context.Context) (*Car, error) {
			once.Do(func() {
				if m.done {
					err = errors.New("querying old values post mutation is not allowed")
				} else {
					value, err = m.Client().Car.Get(ctx, id)
				}
			})
			return value, err
		}
		m.id = &id
	}
}

// withCar sets the old Car of the mutation.
func withCar(node *Car) carOption {
	return func(m *CarMutation) {
		m.oldValue = func(context.Context) (*Car, error) {
			return node, nil
		}
		m.id = &node.ID
	}
}

// Client returns a new `ent.Client` from the mutation. If the mutation was
// executed in a transaction (ent.Tx), a transactional client is returned.
func (m CarMutation) Client() *Client {
	client := &Client{config: m.config}
	client.init()
	return client
}

// Tx returns an `ent.Tx` for mutations that were executed in transactions;
// it returns an error otherwise.
func (m CarMutation) Tx() (*Tx, error) {
	if _, ok := m.driver.(*txDriver); !ok {
		return nil, errors.New("entv2: mutation is not running in a transaction")
	}
	tx := &Tx{config: m.config}
	tx.init()
	return tx, nil
}

// IDs queries the database and returns the entity ids that match the mutation's predicate.
// That means, if the mutation is applied within a transaction with an isolation level such
// as sql.LevelSerializable, the returned ids match the ids of the rows that will be updated
// or updated by the mutation.
func (m *CarMutation) IDs(ctx context.Context) ([]int, error) {
	switch {
	case m.Op().Is(OpUpdateOne | OpDeleteOne):
		id, exists := m.ID()
		if exists {
			return []int{id}, nil
		}
		fallthrough
	case m.Op().Is(OpUpdate | OpDelete):
		return m.Client().Car.Query().Where(m.Predicates()...).IDs(ctx)
	default:
		return nil, fmt.Errorf("IDs is not allowed on %s operations", m.Op())
	}
}

// OldName returns the old "name" field's value of the Car entity.
// If the Car object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *CarMutation) OldName(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldName is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldName requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldName: %w", err)
	}
	return oldValue.Name, nil
}

// OldField returns the old value of the field from the database. An error is
// returned if the mutation operation is not UpdateOne, or the query to the
// database failed.
func (m *CarMutation) OldField(ctx context.Context, name string) (ent.Value, error) {
	switch name {
	case car.FieldName:
		return m.OldName(ctx)
	}
	return nil, fmt.Errorf("unknown Car field %s", name)
}

// ConversionMutation represents an operation that mutates the Conversion nodes in the graph.
type ConversionMutation struct {
	conversion.Mutation
	config
	id       *int
	done     bool
	oldValue func(context.Context) (*Conversion, error)
}

var _ ent.Mutation = (*ConversionMutation)(nil)

// conversionOption allows management of the mutation configuration using functional options.
type conversionOption func(*ConversionMutation)

// newConversionMutation creates new mutation for the Conversion entity.
func newConversionMutation(c config, op Op, opts ...conversionOption) *ConversionMutation {
	m := &ConversionMutation{
		Mutation: *conversion.NewMutation(op),
		config:   c,
	}
	for _, opt := range opts {
		opt(m)
	}
	return m
}

// ID returns the ID value in the mutation. Note that the ID is only available
// if it was provided to the builder or after it was returned from the database.
func (m *ConversionMutation) ID() (id int, exists bool) {
	if m.id == nil {
		return
	}
	return *m.id, true
}

// withConversionID sets the ID field of the mutation.
func withConversionID(id int) conversionOption {
	return func(m *ConversionMutation) {
		var (
			err   error
			once  sync.Once
			value *Conversion
		)
		m.oldValue = func(ctx context.Context) (*Conversion, error) {
			once.Do(func() {
				if m.done {
					err = errors.New("querying old values post mutation is not allowed")
				} else {
					value, err = m.Client().Conversion.Get(ctx, id)
				}
			})
			return value, err
		}
		m.id = &id
	}
}

// withConversion sets the old Conversion of the mutation.
func withConversion(node *Conversion) conversionOption {
	return func(m *ConversionMutation) {
		m.oldValue = func(context.Context) (*Conversion, error) {
			return node, nil
		}
		m.id = &node.ID
	}
}

// Client returns a new `ent.Client` from the mutation. If the mutation was
// executed in a transaction (ent.Tx), a transactional client is returned.
func (m ConversionMutation) Client() *Client {
	client := &Client{config: m.config}
	client.init()
	return client
}

// Tx returns an `ent.Tx` for mutations that were executed in transactions;
// it returns an error otherwise.
func (m ConversionMutation) Tx() (*Tx, error) {
	if _, ok := m.driver.(*txDriver); !ok {
		return nil, errors.New("entv2: mutation is not running in a transaction")
	}
	tx := &Tx{config: m.config}
	tx.init()
	return tx, nil
}

// IDs queries the database and returns the entity ids that match the mutation's predicate.
// That means, if the mutation is applied within a transaction with an isolation level such
// as sql.LevelSerializable, the returned ids match the ids of the rows that will be updated
// or updated by the mutation.
func (m *ConversionMutation) IDs(ctx context.Context) ([]int, error) {
	switch {
	case m.Op().Is(OpUpdateOne | OpDeleteOne):
		id, exists := m.ID()
		if exists {
			return []int{id}, nil
		}
		fallthrough
	case m.Op().Is(OpUpdate | OpDelete):
		return m.Client().Conversion.Query().Where(m.Predicates()...).IDs(ctx)
	default:
		return nil, fmt.Errorf("IDs is not allowed on %s operations", m.Op())
	}
}

// OldName returns the old "name" field's value of the Conversion entity.
// If the Conversion object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *ConversionMutation) OldName(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldName is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldName requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldName: %w", err)
	}
	return oldValue.Name, nil
}

// OldInt8ToString returns the old "int8_to_string" field's value of the Conversion entity.
// If the Conversion object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *ConversionMutation) OldInt8ToString(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldInt8ToString is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldInt8ToString requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldInt8ToString: %w", err)
	}
	return oldValue.Int8ToString, nil
}

// OldUint8ToString returns the old "uint8_to_string" field's value of the Conversion entity.
// If the Conversion object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *ConversionMutation) OldUint8ToString(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldUint8ToString is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldUint8ToString requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldUint8ToString: %w", err)
	}
	return oldValue.Uint8ToString, nil
}

// OldInt16ToString returns the old "int16_to_string" field's value of the Conversion entity.
// If the Conversion object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *ConversionMutation) OldInt16ToString(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldInt16ToString is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldInt16ToString requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldInt16ToString: %w", err)
	}
	return oldValue.Int16ToString, nil
}

// OldUint16ToString returns the old "uint16_to_string" field's value of the Conversion entity.
// If the Conversion object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *ConversionMutation) OldUint16ToString(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldUint16ToString is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldUint16ToString requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldUint16ToString: %w", err)
	}
	return oldValue.Uint16ToString, nil
}

// OldInt32ToString returns the old "int32_to_string" field's value of the Conversion entity.
// If the Conversion object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *ConversionMutation) OldInt32ToString(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldInt32ToString is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldInt32ToString requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldInt32ToString: %w", err)
	}
	return oldValue.Int32ToString, nil
}

// OldUint32ToString returns the old "uint32_to_string" field's value of the Conversion entity.
// If the Conversion object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *ConversionMutation) OldUint32ToString(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldUint32ToString is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldUint32ToString requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldUint32ToString: %w", err)
	}
	return oldValue.Uint32ToString, nil
}

// OldInt64ToString returns the old "int64_to_string" field's value of the Conversion entity.
// If the Conversion object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *ConversionMutation) OldInt64ToString(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldInt64ToString is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldInt64ToString requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldInt64ToString: %w", err)
	}
	return oldValue.Int64ToString, nil
}

// OldUint64ToString returns the old "uint64_to_string" field's value of the Conversion entity.
// If the Conversion object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *ConversionMutation) OldUint64ToString(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldUint64ToString is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldUint64ToString requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldUint64ToString: %w", err)
	}
	return oldValue.Uint64ToString, nil
}

// OldField returns the old value of the field from the database. An error is
// returned if the mutation operation is not UpdateOne, or the query to the
// database failed.
func (m *ConversionMutation) OldField(ctx context.Context, name string) (ent.Value, error) {
	switch name {
	case conversion.FieldName:
		return m.OldName(ctx)
	case conversion.FieldInt8ToString:
		return m.OldInt8ToString(ctx)
	case conversion.FieldUint8ToString:
		return m.OldUint8ToString(ctx)
	case conversion.FieldInt16ToString:
		return m.OldInt16ToString(ctx)
	case conversion.FieldUint16ToString:
		return m.OldUint16ToString(ctx)
	case conversion.FieldInt32ToString:
		return m.OldInt32ToString(ctx)
	case conversion.FieldUint32ToString:
		return m.OldUint32ToString(ctx)
	case conversion.FieldInt64ToString:
		return m.OldInt64ToString(ctx)
	case conversion.FieldUint64ToString:
		return m.OldUint64ToString(ctx)
	}
	return nil, fmt.Errorf("unknown Conversion field %s", name)
}

// CustomTypeMutation represents an operation that mutates the CustomType nodes in the graph.
type CustomTypeMutation struct {
	customtype.Mutation
	config
	id       *int
	done     bool
	oldValue func(context.Context) (*CustomType, error)
}

var _ ent.Mutation = (*CustomTypeMutation)(nil)

// customtypeOption allows management of the mutation configuration using functional options.
type customtypeOption func(*CustomTypeMutation)

// newCustomTypeMutation creates new mutation for the CustomType entity.
func newCustomTypeMutation(c config, op Op, opts ...customtypeOption) *CustomTypeMutation {
	m := &CustomTypeMutation{
		Mutation: *customtype.NewMutation(op),
		config:   c,
	}
	for _, opt := range opts {
		opt(m)
	}
	return m
}

// ID returns the ID value in the mutation. Note that the ID is only available
// if it was provided to the builder or after it was returned from the database.
func (m *CustomTypeMutation) ID() (id int, exists bool) {
	if m.id == nil {
		return
	}
	return *m.id, true
}

// withCustomTypeID sets the ID field of the mutation.
func withCustomTypeID(id int) customtypeOption {
	return func(m *CustomTypeMutation) {
		var (
			err   error
			once  sync.Once
			value *CustomType
		)
		m.oldValue = func(ctx context.Context) (*CustomType, error) {
			once.Do(func() {
				if m.done {
					err = errors.New("querying old values post mutation is not allowed")
				} else {
					value, err = m.Client().CustomType.Get(ctx, id)
				}
			})
			return value, err
		}
		m.id = &id
	}
}

// withCustomType sets the old CustomType of the mutation.
func withCustomType(node *CustomType) customtypeOption {
	return func(m *CustomTypeMutation) {
		m.oldValue = func(context.Context) (*CustomType, error) {
			return node, nil
		}
		m.id = &node.ID
	}
}

// Client returns a new `ent.Client` from the mutation. If the mutation was
// executed in a transaction (ent.Tx), a transactional client is returned.
func (m CustomTypeMutation) Client() *Client {
	client := &Client{config: m.config}
	client.init()
	return client
}

// Tx returns an `ent.Tx` for mutations that were executed in transactions;
// it returns an error otherwise.
func (m CustomTypeMutation) Tx() (*Tx, error) {
	if _, ok := m.driver.(*txDriver); !ok {
		return nil, errors.New("entv2: mutation is not running in a transaction")
	}
	tx := &Tx{config: m.config}
	tx.init()
	return tx, nil
}

// IDs queries the database and returns the entity ids that match the mutation's predicate.
// That means, if the mutation is applied within a transaction with an isolation level such
// as sql.LevelSerializable, the returned ids match the ids of the rows that will be updated
// or updated by the mutation.
func (m *CustomTypeMutation) IDs(ctx context.Context) ([]int, error) {
	switch {
	case m.Op().Is(OpUpdateOne | OpDeleteOne):
		id, exists := m.ID()
		if exists {
			return []int{id}, nil
		}
		fallthrough
	case m.Op().Is(OpUpdate | OpDelete):
		return m.Client().CustomType.Query().Where(m.Predicates()...).IDs(ctx)
	default:
		return nil, fmt.Errorf("IDs is not allowed on %s operations", m.Op())
	}
}

// OldCustom returns the old "custom" field's value of the CustomType entity.
// If the CustomType object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *CustomTypeMutation) OldCustom(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldCustom is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldCustom requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldCustom: %w", err)
	}
	return oldValue.Custom, nil
}

// OldTz0 returns the old "tz0" field's value of the CustomType entity.
// If the CustomType object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *CustomTypeMutation) OldTz0(ctx context.Context) (v time.Time, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldTz0 is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldTz0 requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldTz0: %w", err)
	}
	return oldValue.Tz0, nil
}

// OldTz3 returns the old "tz3" field's value of the CustomType entity.
// If the CustomType object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *CustomTypeMutation) OldTz3(ctx context.Context) (v time.Time, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldTz3 is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldTz3 requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldTz3: %w", err)
	}
	return oldValue.Tz3, nil
}

// OldField returns the old value of the field from the database. An error is
// returned if the mutation operation is not UpdateOne, or the query to the
// database failed.
func (m *CustomTypeMutation) OldField(ctx context.Context, name string) (ent.Value, error) {
	switch name {
	case customtype.FieldCustom:
		return m.OldCustom(ctx)
	case customtype.FieldTz0:
		return m.OldTz0(ctx)
	case customtype.FieldTz3:
		return m.OldTz3(ctx)
	}
	return nil, fmt.Errorf("unknown CustomType field %s", name)
}

// GroupMutation represents an operation that mutates the Group nodes in the graph.
type GroupMutation struct {
	group.Mutation
	config
	id       *int
	done     bool
	oldValue func(context.Context) (*Group, error)
}

var _ ent.Mutation = (*GroupMutation)(nil)

// groupOption allows management of the mutation configuration using functional options.
type groupOption func(*GroupMutation)

// newGroupMutation creates new mutation for the Group entity.
func newGroupMutation(c config, op Op, opts ...groupOption) *GroupMutation {
	m := &GroupMutation{
		Mutation: *group.NewMutation(op),
		config:   c,
	}
	for _, opt := range opts {
		opt(m)
	}
	return m
}

// ID returns the ID value in the mutation. Note that the ID is only available
// if it was provided to the builder or after it was returned from the database.
func (m *GroupMutation) ID() (id int, exists bool) {
	if m.id == nil {
		return
	}
	return *m.id, true
}

// withGroupID sets the ID field of the mutation.
func withGroupID(id int) groupOption {
	return func(m *GroupMutation) {
		var (
			err   error
			once  sync.Once
			value *Group
		)
		m.oldValue = func(ctx context.Context) (*Group, error) {
			once.Do(func() {
				if m.done {
					err = errors.New("querying old values post mutation is not allowed")
				} else {
					value, err = m.Client().Group.Get(ctx, id)
				}
			})
			return value, err
		}
		m.id = &id
	}
}

// withGroup sets the old Group of the mutation.
func withGroup(node *Group) groupOption {
	return func(m *GroupMutation) {
		m.oldValue = func(context.Context) (*Group, error) {
			return node, nil
		}
		m.id = &node.ID
	}
}

// Client returns a new `ent.Client` from the mutation. If the mutation was
// executed in a transaction (ent.Tx), a transactional client is returned.
func (m GroupMutation) Client() *Client {
	client := &Client{config: m.config}
	client.init()
	return client
}

// Tx returns an `ent.Tx` for mutations that were executed in transactions;
// it returns an error otherwise.
func (m GroupMutation) Tx() (*Tx, error) {
	if _, ok := m.driver.(*txDriver); !ok {
		return nil, errors.New("entv2: mutation is not running in a transaction")
	}
	tx := &Tx{config: m.config}
	tx.init()
	return tx, nil
}

// IDs queries the database and returns the entity ids that match the mutation's predicate.
// That means, if the mutation is applied within a transaction with an isolation level such
// as sql.LevelSerializable, the returned ids match the ids of the rows that will be updated
// or updated by the mutation.
func (m *GroupMutation) IDs(ctx context.Context) ([]int, error) {
	switch {
	case m.Op().Is(OpUpdateOne | OpDeleteOne):
		id, exists := m.ID()
		if exists {
			return []int{id}, nil
		}
		fallthrough
	case m.Op().Is(OpUpdate | OpDelete):
		return m.Client().Group.Query().Where(m.Predicates()...).IDs(ctx)
	default:
		return nil, fmt.Errorf("IDs is not allowed on %s operations", m.Op())
	}
}

// OldField returns the old value of the field from the database. An error is
// returned if the mutation operation is not UpdateOne, or the query to the
// database failed.
func (m *GroupMutation) OldField(ctx context.Context, name string) (ent.Value, error) {
	return nil, fmt.Errorf("unknown Group field %s", name)
}

// MediaMutation represents an operation that mutates the Media nodes in the graph.
type MediaMutation struct {
	media.Mutation
	config
	id       *int
	done     bool
	oldValue func(context.Context) (*Media, error)
}

var _ ent.Mutation = (*MediaMutation)(nil)

// mediaOption allows management of the mutation configuration using functional options.
type mediaOption func(*MediaMutation)

// newMediaMutation creates new mutation for the Media entity.
func newMediaMutation(c config, op Op, opts ...mediaOption) *MediaMutation {
	m := &MediaMutation{
		Mutation: *media.NewMutation(op),
		config:   c,
	}
	for _, opt := range opts {
		opt(m)
	}
	return m
}

// ID returns the ID value in the mutation. Note that the ID is only available
// if it was provided to the builder or after it was returned from the database.
func (m *MediaMutation) ID() (id int, exists bool) {
	if m.id == nil {
		return
	}
	return *m.id, true
}

// withMediaID sets the ID field of the mutation.
func withMediaID(id int) mediaOption {
	return func(m *MediaMutation) {
		var (
			err   error
			once  sync.Once
			value *Media
		)
		m.oldValue = func(ctx context.Context) (*Media, error) {
			once.Do(func() {
				if m.done {
					err = errors.New("querying old values post mutation is not allowed")
				} else {
					value, err = m.Client().Media.Get(ctx, id)
				}
			})
			return value, err
		}
		m.id = &id
	}
}

// withMedia sets the old Media of the mutation.
func withMedia(node *Media) mediaOption {
	return func(m *MediaMutation) {
		m.oldValue = func(context.Context) (*Media, error) {
			return node, nil
		}
		m.id = &node.ID
	}
}

// Client returns a new `ent.Client` from the mutation. If the mutation was
// executed in a transaction (ent.Tx), a transactional client is returned.
func (m MediaMutation) Client() *Client {
	client := &Client{config: m.config}
	client.init()
	return client
}

// Tx returns an `ent.Tx` for mutations that were executed in transactions;
// it returns an error otherwise.
func (m MediaMutation) Tx() (*Tx, error) {
	if _, ok := m.driver.(*txDriver); !ok {
		return nil, errors.New("entv2: mutation is not running in a transaction")
	}
	tx := &Tx{config: m.config}
	tx.init()
	return tx, nil
}

// IDs queries the database and returns the entity ids that match the mutation's predicate.
// That means, if the mutation is applied within a transaction with an isolation level such
// as sql.LevelSerializable, the returned ids match the ids of the rows that will be updated
// or updated by the mutation.
func (m *MediaMutation) IDs(ctx context.Context) ([]int, error) {
	switch {
	case m.Op().Is(OpUpdateOne | OpDeleteOne):
		id, exists := m.ID()
		if exists {
			return []int{id}, nil
		}
		fallthrough
	case m.Op().Is(OpUpdate | OpDelete):
		return m.Client().Media.Query().Where(m.Predicates()...).IDs(ctx)
	default:
		return nil, fmt.Errorf("IDs is not allowed on %s operations", m.Op())
	}
}

// OldSource returns the old "source" field's value of the Media entity.
// If the Media object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *MediaMutation) OldSource(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldSource is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldSource requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldSource: %w", err)
	}
	return oldValue.Source, nil
}

// OldSourceURI returns the old "source_uri" field's value of the Media entity.
// If the Media object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *MediaMutation) OldSourceURI(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldSourceURI is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldSourceURI requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldSourceURI: %w", err)
	}
	return oldValue.SourceURI, nil
}

// OldText returns the old "text" field's value of the Media entity.
// If the Media object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *MediaMutation) OldText(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldText is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldText requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldText: %w", err)
	}
	return oldValue.Text, nil
}

// OldField returns the old value of the field from the database. An error is
// returned if the mutation operation is not UpdateOne, or the query to the
// database failed.
func (m *MediaMutation) OldField(ctx context.Context, name string) (ent.Value, error) {
	switch name {
	case media.FieldSource:
		return m.OldSource(ctx)
	case media.FieldSourceURI:
		return m.OldSourceURI(ctx)
	case media.FieldText:
		return m.OldText(ctx)
	}
	return nil, fmt.Errorf("unknown Media field %s", name)
}

// PetMutation represents an operation that mutates the Pet nodes in the graph.
type PetMutation struct {
	pet.Mutation
	config
	id       *int
	done     bool
	oldValue func(context.Context) (*Pet, error)
}

var _ ent.Mutation = (*PetMutation)(nil)

// petOption allows management of the mutation configuration using functional options.
type petOption func(*PetMutation)

// newPetMutation creates new mutation for the Pet entity.
func newPetMutation(c config, op Op, opts ...petOption) *PetMutation {
	m := &PetMutation{
		Mutation: *pet.NewMutation(op),
		config:   c,
	}
	for _, opt := range opts {
		opt(m)
	}
	return m
}

// ID returns the ID value in the mutation. Note that the ID is only available
// if it was provided to the builder or after it was returned from the database.
func (m *PetMutation) ID() (id int, exists bool) {
	if m.id == nil {
		return
	}
	return *m.id, true
}

// withPetID sets the ID field of the mutation.
func withPetID(id int) petOption {
	return func(m *PetMutation) {
		var (
			err   error
			once  sync.Once
			value *Pet
		)
		m.oldValue = func(ctx context.Context) (*Pet, error) {
			once.Do(func() {
				if m.done {
					err = errors.New("querying old values post mutation is not allowed")
				} else {
					value, err = m.Client().Pet.Get(ctx, id)
				}
			})
			return value, err
		}
		m.id = &id
	}
}

// withPet sets the old Pet of the mutation.
func withPet(node *Pet) petOption {
	return func(m *PetMutation) {
		m.oldValue = func(context.Context) (*Pet, error) {
			return node, nil
		}
		m.id = &node.ID
	}
}

// Client returns a new `ent.Client` from the mutation. If the mutation was
// executed in a transaction (ent.Tx), a transactional client is returned.
func (m PetMutation) Client() *Client {
	client := &Client{config: m.config}
	client.init()
	return client
}

// Tx returns an `ent.Tx` for mutations that were executed in transactions;
// it returns an error otherwise.
func (m PetMutation) Tx() (*Tx, error) {
	if _, ok := m.driver.(*txDriver); !ok {
		return nil, errors.New("entv2: mutation is not running in a transaction")
	}
	tx := &Tx{config: m.config}
	tx.init()
	return tx, nil
}

// IDs queries the database and returns the entity ids that match the mutation's predicate.
// That means, if the mutation is applied within a transaction with an isolation level such
// as sql.LevelSerializable, the returned ids match the ids of the rows that will be updated
// or updated by the mutation.
func (m *PetMutation) IDs(ctx context.Context) ([]int, error) {
	switch {
	case m.Op().Is(OpUpdateOne | OpDeleteOne):
		id, exists := m.ID()
		if exists {
			return []int{id}, nil
		}
		fallthrough
	case m.Op().Is(OpUpdate | OpDelete):
		return m.Client().Pet.Query().Where(m.Predicates()...).IDs(ctx)
	default:
		return nil, fmt.Errorf("IDs is not allowed on %s operations", m.Op())
	}
}

// OldName returns the old "name" field's value of the Pet entity.
// If the Pet object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *PetMutation) OldName(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldName is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldName requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldName: %w", err)
	}
	return oldValue.Name, nil
}

// OldField returns the old value of the field from the database. An error is
// returned if the mutation operation is not UpdateOne, or the query to the
// database failed.
func (m *PetMutation) OldField(ctx context.Context, name string) (ent.Value, error) {
	switch name {
	case pet.FieldName:
		return m.OldName(ctx)
	}
	return nil, fmt.Errorf("unknown Pet field %s", name)
}

// UserMutation represents an operation that mutates the User nodes in the graph.
type UserMutation struct {
	user.Mutation
	config
	id       *int
	done     bool
	oldValue func(context.Context) (*User, error)
}

var _ ent.Mutation = (*UserMutation)(nil)

// userOption allows management of the mutation configuration using functional options.
type userOption func(*UserMutation)

// newUserMutation creates new mutation for the User entity.
func newUserMutation(c config, op Op, opts ...userOption) *UserMutation {
	m := &UserMutation{
		Mutation: *user.NewMutation(op),
		config:   c,
	}
	for _, opt := range opts {
		opt(m)
	}
	return m
}

// SetID sets the value of the id field. Note that this
// operation is only accepted on creation of User entities.
func (m *UserMutation) SetID(id int) {
	m.id = &id
}

// ID returns the ID value in the mutation. Note that the ID is only available
// if it was provided to the builder or after it was returned from the database.
func (m *UserMutation) ID() (id int, exists bool) {
	if m.id == nil {
		return
	}
	return *m.id, true
}

// withUserID sets the ID field of the mutation.
func withUserID(id int) userOption {
	return func(m *UserMutation) {
		var (
			err   error
			once  sync.Once
			value *User
		)
		m.oldValue = func(ctx context.Context) (*User, error) {
			once.Do(func() {
				if m.done {
					err = errors.New("querying old values post mutation is not allowed")
				} else {
					value, err = m.Client().User.Get(ctx, id)
				}
			})
			return value, err
		}
		m.id = &id
	}
}

// withUser sets the old User of the mutation.
func withUser(node *User) userOption {
	return func(m *UserMutation) {
		m.oldValue = func(context.Context) (*User, error) {
			return node, nil
		}
		m.id = &node.ID
	}
}

// Client returns a new `ent.Client` from the mutation. If the mutation was
// executed in a transaction (ent.Tx), a transactional client is returned.
func (m UserMutation) Client() *Client {
	client := &Client{config: m.config}
	client.init()
	return client
}

// Tx returns an `ent.Tx` for mutations that were executed in transactions;
// it returns an error otherwise.
func (m UserMutation) Tx() (*Tx, error) {
	if _, ok := m.driver.(*txDriver); !ok {
		return nil, errors.New("entv2: mutation is not running in a transaction")
	}
	tx := &Tx{config: m.config}
	tx.init()
	return tx, nil
}

// IDs queries the database and returns the entity ids that match the mutation's predicate.
// That means, if the mutation is applied within a transaction with an isolation level such
// as sql.LevelSerializable, the returned ids match the ids of the rows that will be updated
// or updated by the mutation.
func (m *UserMutation) IDs(ctx context.Context) ([]int, error) {
	switch {
	case m.Op().Is(OpUpdateOne | OpDeleteOne):
		id, exists := m.ID()
		if exists {
			return []int{id}, nil
		}
		fallthrough
	case m.Op().Is(OpUpdate | OpDelete):
		return m.Client().User.Query().Where(m.Predicates()...).IDs(ctx)
	default:
		return nil, fmt.Errorf("IDs is not allowed on %s operations", m.Op())
	}
}

// OldMixedString returns the old "mixed_string" field's value of the User entity.
// If the User object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *UserMutation) OldMixedString(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldMixedString is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldMixedString requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldMixedString: %w", err)
	}
	return oldValue.MixedString, nil
}

// OldMixedEnum returns the old "mixed_enum" field's value of the User entity.
// If the User object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *UserMutation) OldMixedEnum(ctx context.Context) (v user.MixedEnum, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldMixedEnum is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldMixedEnum requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldMixedEnum: %w", err)
	}
	return oldValue.MixedEnum, nil
}

// OldActive returns the old "active" field's value of the User entity.
// If the User object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *UserMutation) OldActive(ctx context.Context) (v bool, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldActive is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldActive requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldActive: %w", err)
	}
	return oldValue.Active, nil
}

// OldAge returns the old "age" field's value of the User entity.
// If the User object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *UserMutation) OldAge(ctx context.Context) (v int, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldAge is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldAge requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldAge: %w", err)
	}
	return oldValue.Age, nil
}

// OldName returns the old "name" field's value of the User entity.
// If the User object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *UserMutation) OldName(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldName is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldName requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldName: %w", err)
	}
	return oldValue.Name, nil
}

// OldDescription returns the old "description" field's value of the User entity.
// If the User object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *UserMutation) OldDescription(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldDescription is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldDescription requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldDescription: %w", err)
	}
	return oldValue.Description, nil
}

// OldNickname returns the old "nickname" field's value of the User entity.
// If the User object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *UserMutation) OldNickname(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldNickname is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldNickname requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldNickname: %w", err)
	}
	return oldValue.Nickname, nil
}

// OldPhone returns the old "phone" field's value of the User entity.
// If the User object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *UserMutation) OldPhone(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldPhone is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldPhone requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldPhone: %w", err)
	}
	return oldValue.Phone, nil
}

// OldBuffer returns the old "buffer" field's value of the User entity.
// If the User object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *UserMutation) OldBuffer(ctx context.Context) (v []byte, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldBuffer is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldBuffer requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldBuffer: %w", err)
	}
	return oldValue.Buffer, nil
}

// OldTitle returns the old "title" field's value of the User entity.
// If the User object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *UserMutation) OldTitle(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldTitle is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldTitle requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldTitle: %w", err)
	}
	return oldValue.Title, nil
}

// OldNewName returns the old "new_name" field's value of the User entity.
// If the User object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *UserMutation) OldNewName(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldNewName is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldNewName requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldNewName: %w", err)
	}
	return oldValue.NewName, nil
}

// OldNewToken returns the old "new_token" field's value of the User entity.
// If the User object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *UserMutation) OldNewToken(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldNewToken is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldNewToken requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldNewToken: %w", err)
	}
	return oldValue.NewToken, nil
}

// OldBlob returns the old "blob" field's value of the User entity.
// If the User object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *UserMutation) OldBlob(ctx context.Context) (v []byte, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldBlob is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldBlob requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldBlob: %w", err)
	}
	return oldValue.Blob, nil
}

// OldState returns the old "state" field's value of the User entity.
// If the User object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *UserMutation) OldState(ctx context.Context) (v user.State, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldState is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldState requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldState: %w", err)
	}
	return oldValue.State, nil
}

// OldStatus returns the old "status" field's value of the User entity.
// If the User object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *UserMutation) OldStatus(ctx context.Context) (v user.Status, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldStatus is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldStatus requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldStatus: %w", err)
	}
	return oldValue.Status, nil
}

// OldWorkplace returns the old "workplace" field's value of the User entity.
// If the User object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *UserMutation) OldWorkplace(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldWorkplace is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldWorkplace requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldWorkplace: %w", err)
	}
	return oldValue.Workplace, nil
}

// OldRoles returns the old "roles" field's value of the User entity.
// If the User object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *UserMutation) OldRoles(ctx context.Context) (v []string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldRoles is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldRoles requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldRoles: %w", err)
	}
	return oldValue.Roles, nil
}

// OldDefaultExpr returns the old "default_expr" field's value of the User entity.
// If the User object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *UserMutation) OldDefaultExpr(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldDefaultExpr is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldDefaultExpr requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldDefaultExpr: %w", err)
	}
	return oldValue.DefaultExpr, nil
}

// OldDefaultExprs returns the old "default_exprs" field's value of the User entity.
// If the User object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *UserMutation) OldDefaultExprs(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldDefaultExprs is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldDefaultExprs requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldDefaultExprs: %w", err)
	}
	return oldValue.DefaultExprs, nil
}

// OldCreatedAt returns the old "created_at" field's value of the User entity.
// If the User object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *UserMutation) OldCreatedAt(ctx context.Context) (v time.Time, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldCreatedAt is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldCreatedAt requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldCreatedAt: %w", err)
	}
	return oldValue.CreatedAt, nil
}

// OldDropOptional returns the old "drop_optional" field's value of the User entity.
// If the User object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *UserMutation) OldDropOptional(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldDropOptional is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldDropOptional requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldDropOptional: %w", err)
	}
	return oldValue.DropOptional, nil
}

// OldField returns the old value of the field from the database. An error is
// returned if the mutation operation is not UpdateOne, or the query to the
// database failed.
func (m *UserMutation) OldField(ctx context.Context, name string) (ent.Value, error) {
	switch name {
	case user.FieldMixedString:
		return m.OldMixedString(ctx)
	case user.FieldMixedEnum:
		return m.OldMixedEnum(ctx)
	case user.FieldActive:
		return m.OldActive(ctx)
	case user.FieldAge:
		return m.OldAge(ctx)
	case user.FieldName:
		return m.OldName(ctx)
	case user.FieldDescription:
		return m.OldDescription(ctx)
	case user.FieldNickname:
		return m.OldNickname(ctx)
	case user.FieldPhone:
		return m.OldPhone(ctx)
	case user.FieldBuffer:
		return m.OldBuffer(ctx)
	case user.FieldTitle:
		return m.OldTitle(ctx)
	case user.FieldNewName:
		return m.OldNewName(ctx)
	case user.FieldNewToken:
		return m.OldNewToken(ctx)
	case user.FieldBlob:
		return m.OldBlob(ctx)
	case user.FieldState:
		return m.OldState(ctx)
	case user.FieldStatus:
		return m.OldStatus(ctx)
	case user.FieldWorkplace:
		return m.OldWorkplace(ctx)
	case user.FieldRoles:
		return m.OldRoles(ctx)
	case user.FieldDefaultExpr:
		return m.OldDefaultExpr(ctx)
	case user.FieldDefaultExprs:
		return m.OldDefaultExprs(ctx)
	case user.FieldCreatedAt:
		return m.OldCreatedAt(ctx)
	case user.FieldDropOptional:
		return m.OldDropOptional(ctx)
	}
	return nil, fmt.Errorf("unknown User field %s", name)
}

// ZooMutation represents an operation that mutates the Zoo nodes in the graph.
type ZooMutation struct {
	zoo.Mutation
	config
	id       *int
	done     bool
	oldValue func(context.Context) (*Zoo, error)
}

var _ ent.Mutation = (*ZooMutation)(nil)

// zooOption allows management of the mutation configuration using functional options.
type zooOption func(*ZooMutation)

// newZooMutation creates new mutation for the Zoo entity.
func newZooMutation(c config, op Op, opts ...zooOption) *ZooMutation {
	m := &ZooMutation{
		Mutation: *zoo.NewMutation(op),
		config:   c,
	}
	for _, opt := range opts {
		opt(m)
	}
	return m
}

// SetID sets the value of the id field. Note that this
// operation is only accepted on creation of Zoo entities.
func (m *ZooMutation) SetID(id int) {
	m.id = &id
}

// ID returns the ID value in the mutation. Note that the ID is only available
// if it was provided to the builder or after it was returned from the database.
func (m *ZooMutation) ID() (id int, exists bool) {
	if m.id == nil {
		return
	}
	return *m.id, true
}

// withZooID sets the ID field of the mutation.
func withZooID(id int) zooOption {
	return func(m *ZooMutation) {
		var (
			err   error
			once  sync.Once
			value *Zoo
		)
		m.oldValue = func(ctx context.Context) (*Zoo, error) {
			once.Do(func() {
				if m.done {
					err = errors.New("querying old values post mutation is not allowed")
				} else {
					value, err = m.Client().Zoo.Get(ctx, id)
				}
			})
			return value, err
		}
		m.id = &id
	}
}

// withZoo sets the old Zoo of the mutation.
func withZoo(node *Zoo) zooOption {
	return func(m *ZooMutation) {
		m.oldValue = func(context.Context) (*Zoo, error) {
			return node, nil
		}
		m.id = &node.ID
	}
}

// Client returns a new `ent.Client` from the mutation. If the mutation was
// executed in a transaction (ent.Tx), a transactional client is returned.
func (m ZooMutation) Client() *Client {
	client := &Client{config: m.config}
	client.init()
	return client
}

// Tx returns an `ent.Tx` for mutations that were executed in transactions;
// it returns an error otherwise.
func (m ZooMutation) Tx() (*Tx, error) {
	if _, ok := m.driver.(*txDriver); !ok {
		return nil, errors.New("entv2: mutation is not running in a transaction")
	}
	tx := &Tx{config: m.config}
	tx.init()
	return tx, nil
}

// IDs queries the database and returns the entity ids that match the mutation's predicate.
// That means, if the mutation is applied within a transaction with an isolation level such
// as sql.LevelSerializable, the returned ids match the ids of the rows that will be updated
// or updated by the mutation.
func (m *ZooMutation) IDs(ctx context.Context) ([]int, error) {
	switch {
	case m.Op().Is(OpUpdateOne | OpDeleteOne):
		id, exists := m.ID()
		if exists {
			return []int{id}, nil
		}
		fallthrough
	case m.Op().Is(OpUpdate | OpDelete):
		return m.Client().Zoo.Query().Where(m.Predicates()...).IDs(ctx)
	default:
		return nil, fmt.Errorf("IDs is not allowed on %s operations", m.Op())
	}
}

// OldField returns the old value of the field from the database. An error is
// returned if the mutation operation is not UpdateOne, or the query to the
// database failed.
func (m *ZooMutation) OldField(ctx context.Context, name string) (ent.Value, error) {
	return nil, fmt.Errorf("unknown Zoo field %s", name)
}