ent/entc/integration/ent/card_query.go

// 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 entc, DO NOT EDIT.

package ent

import (
	"context"
	"database/sql/driver"
	"errors"
	"fmt"
	"math"

	"github.com/facebook/ent/dialect/sql"
	"github.com/facebook/ent/dialect/sql/sqlgraph"
	"github.com/facebook/ent/entc/integration/ent/card"
	"github.com/facebook/ent/entc/integration/ent/predicate"
	"github.com/facebook/ent/entc/integration/ent/spec"
	"github.com/facebook/ent/entc/integration/ent/user"
	"github.com/facebook/ent/schema/field"
)

// CardQuery is the builder for querying Card entities.
type CardQuery struct {
	config
	limit      *int
	offset     *int
	order      []OrderFunc
	fields     []string
	predicates []predicate.Card
	// eager-loading edges.
	withOwner *UserQuery
	withSpec  *SpecQuery
	withFKs   bool
	// intermediate query (i.e. traversal path).
	sql  *sql.Selector
	path func(context.Context) (*sql.Selector, error)
}

// Where adds a new predicate for the CardQuery builder.
func (cq *CardQuery) Where(ps ...predicate.Card) *CardQuery {
	cq.predicates = append(cq.predicates, ps...)
	return cq
}

// Limit adds a limit step to the query.
func (cq *CardQuery) Limit(limit int) *CardQuery {
	cq.limit = &limit
	return cq
}

// Offset adds an offset step to the query.
func (cq *CardQuery) Offset(offset int) *CardQuery {
	cq.offset = &offset
	return cq
}

// Order adds an order step to the query.
func (cq *CardQuery) Order(o ...OrderFunc) *CardQuery {
	cq.order = append(cq.order, o...)
	return cq
}

// QueryOwner chains the current query on the "owner" edge.
func (cq *CardQuery) QueryOwner() *UserQuery {
	query := &UserQuery{config: cq.config}
	query.path = func(ctx context.Context) (fromU *sql.Selector, err error) {
		if err := cq.prepareQuery(ctx); err != nil {
			return nil, err
		}
		selector := cq.sqlQuery(ctx)
		if err := selector.Err(); err != nil {
			return nil, err
		}
		step := sqlgraph.NewStep(
			sqlgraph.From(card.Table, card.FieldID, selector),
			sqlgraph.To(user.Table, user.FieldID),
			sqlgraph.Edge(sqlgraph.O2O, true, card.OwnerTable, card.OwnerColumn),
		)
		fromU = sqlgraph.SetNeighbors(cq.driver.Dialect(), step)
		return fromU, nil
	}
	return query
}

// QuerySpec chains the current query on the "spec" edge.
func (cq *CardQuery) QuerySpec() *SpecQuery {
	query := &SpecQuery{config: cq.config}
	query.path = func(ctx context.Context) (fromU *sql.Selector, err error) {
		if err := cq.prepareQuery(ctx); err != nil {
			return nil, err
		}
		selector := cq.sqlQuery(ctx)
		if err := selector.Err(); err != nil {
			return nil, err
		}
		step := sqlgraph.NewStep(
			sqlgraph.From(card.Table, card.FieldID, selector),
			sqlgraph.To(spec.Table, spec.FieldID),
			sqlgraph.Edge(sqlgraph.M2M, true, card.SpecTable, card.SpecPrimaryKey...),
		)
		fromU = sqlgraph.SetNeighbors(cq.driver.Dialect(), step)
		return fromU, nil
	}
	return query
}

// First returns the first Card entity from the query.
// Returns a *NotFoundError when no Card was found.
func (cq *CardQuery) First(ctx context.Context) (*Card, error) {
	nodes, err := cq.Limit(1).All(ctx)
	if err != nil {
		return nil, err
	}
	if len(nodes) == 0 {
		return nil, &NotFoundError{card.Label}
	}
	return nodes[0], nil
}

// FirstX is like First, but panics if an error occurs.
func (cq *CardQuery) FirstX(ctx context.Context) *Card {
	node, err := cq.First(ctx)
	if err != nil && !IsNotFound(err) {
		panic(err)
	}
	return node
}

// FirstID returns the first Card ID from the query.
// Returns a *NotFoundError when no Card ID was found.
func (cq *CardQuery) FirstID(ctx context.Context) (id int, err error) {
	var ids []int
	if ids, err = cq.Limit(1).IDs(ctx); err != nil {
		return
	}
	if len(ids) == 0 {
		err = &NotFoundError{card.Label}
		return
	}
	return ids[0], nil
}

// FirstIDX is like FirstID, but panics if an error occurs.
func (cq *CardQuery) FirstIDX(ctx context.Context) int {
	id, err := cq.FirstID(ctx)
	if err != nil && !IsNotFound(err) {
		panic(err)
	}
	return id
}

// Only returns a single Card entity found by the query, ensuring it only returns one.
// Returns a *NotSingularError when exactly one Card entity is not found.
// Returns a *NotFoundError when no Card entities are found.
func (cq *CardQuery) Only(ctx context.Context) (*Card, error) {
	nodes, err := cq.Limit(2).All(ctx)
	if err != nil {
		return nil, err
	}
	switch len(nodes) {
	case 1:
		return nodes[0], nil
	case 0:
		return nil, &NotFoundError{card.Label}
	default:
		return nil, &NotSingularError{card.Label}
	}
}

// OnlyX is like Only, but panics if an error occurs.
func (cq *CardQuery) OnlyX(ctx context.Context) *Card {
	node, err := cq.Only(ctx)
	if err != nil {
		panic(err)
	}
	return node
}

// OnlyID is like Only, but returns the only Card ID in the query.
// Returns a *NotSingularError when exactly one Card ID is not found.
// Returns a *NotFoundError when no entities are found.
func (cq *CardQuery) OnlyID(ctx context.Context) (id int, err error) {
	var ids []int
	if ids, err = cq.Limit(2).IDs(ctx); err != nil {
		return
	}
	switch len(ids) {
	case 1:
		id = ids[0]
	case 0:
		err = &NotFoundError{card.Label}
	default:
		err = &NotSingularError{card.Label}
	}
	return
}

// OnlyIDX is like OnlyID, but panics if an error occurs.
func (cq *CardQuery) OnlyIDX(ctx context.Context) int {
	id, err := cq.OnlyID(ctx)
	if err != nil {
		panic(err)
	}
	return id
}

// All executes the query and returns a list of Cards.
func (cq *CardQuery) All(ctx context.Context) ([]*Card, error) {
	if err := cq.prepareQuery(ctx); err != nil {
		return nil, err
	}
	return cq.sqlAll(ctx)
}

// AllX is like All, but panics if an error occurs.
func (cq *CardQuery) AllX(ctx context.Context) []*Card {
	nodes, err := cq.All(ctx)
	if err != nil {
		panic(err)
	}
	return nodes
}

// IDs executes the query and returns a list of Card IDs.
func (cq *CardQuery) IDs(ctx context.Context) ([]int, error) {
	var ids []int
	if err := cq.Select(card.FieldID).Scan(ctx, &ids); err != nil {
		return nil, err
	}
	return ids, nil
}

// IDsX is like IDs, but panics if an error occurs.
func (cq *CardQuery) IDsX(ctx context.Context) []int {
	ids, err := cq.IDs(ctx)
	if err != nil {
		panic(err)
	}
	return ids
}

// Count returns the count of the given query.
func (cq *CardQuery) Count(ctx context.Context) (int, error) {
	if err := cq.prepareQuery(ctx); err != nil {
		return 0, err
	}
	return cq.sqlCount(ctx)
}

// CountX is like Count, but panics if an error occurs.
func (cq *CardQuery) CountX(ctx context.Context) int {
	count, err := cq.Count(ctx)
	if err != nil {
		panic(err)
	}
	return count
}

// Exist returns true if the query has elements in the graph.
func (cq *CardQuery) Exist(ctx context.Context) (bool, error) {
	if err := cq.prepareQuery(ctx); err != nil {
		return false, err
	}
	return cq.sqlExist(ctx)
}

// ExistX is like Exist, but panics if an error occurs.
func (cq *CardQuery) ExistX(ctx context.Context) bool {
	exist, err := cq.Exist(ctx)
	if err != nil {
		panic(err)
	}
	return exist
}

// Clone returns a duplicate of the CardQuery builder, including all associated steps. It can be
// used to prepare common query builders and use them differently after the clone is made.
func (cq *CardQuery) Clone() *CardQuery {
	if cq == nil {
		return nil
	}
	return &CardQuery{
		config:     cq.config,
		limit:      cq.limit,
		offset:     cq.offset,
		order:      append([]OrderFunc{}, cq.order...),
		predicates: append([]predicate.Card{}, cq.predicates...),
		withOwner:  cq.withOwner.Clone(),
		withSpec:   cq.withSpec.Clone(),
		// clone intermediate query.
		sql:  cq.sql.Clone(),
		path: cq.path,
	}
}

// WithOwner tells the query-builder to eager-load the nodes that are connected to
// the "owner" edge. The optional arguments are used to configure the query builder of the edge.
func (cq *CardQuery) WithOwner(opts ...func(*UserQuery)) *CardQuery {
	query := &UserQuery{config: cq.config}
	for _, opt := range opts {
		opt(query)
	}
	cq.withOwner = query
	return cq
}

// WithSpec tells the query-builder to eager-load the nodes that are connected to
// the "spec" edge. The optional arguments are used to configure the query builder of the edge.
func (cq *CardQuery) WithSpec(opts ...func(*SpecQuery)) *CardQuery {
	query := &SpecQuery{config: cq.config}
	for _, opt := range opts {
		opt(query)
	}
	cq.withSpec = query
	return cq
}

// GroupBy is used to group vertices by one or more fields/columns.
// It is often used with aggregate functions, like: count, max, mean, min, sum.
//
// Example:
//
//	var v []struct {
//		CreateTime time.Time `json:"create_time,omitempty"`
//		Count int `json:"count,omitempty"`
//	}
//
//	client.Card.Query().
//		GroupBy(card.FieldCreateTime).
//		Aggregate(ent.Count()).
//		Scan(ctx, &v)
//
func (cq *CardQuery) GroupBy(field string, fields ...string) *CardGroupBy {
	group := &CardGroupBy{config: cq.config}
	group.fields = append([]string{field}, fields...)
	group.path = func(ctx context.Context) (prev *sql.Selector, err error) {
		if err := cq.prepareQuery(ctx); err != nil {
			return nil, err
		}
		return cq.sqlQuery(ctx), nil
	}
	return group
}

// Select allows the selection one or more fields/columns for the given query,
// instead of selecting all fields in the entity.
//
// Example:
//
//	var v []struct {
//		CreateTime time.Time `json:"create_time,omitempty"`
//	}
//
//	client.Card.Query().
//		Select(card.FieldCreateTime).
//		Scan(ctx, &v)
//
func (cq *CardQuery) Select(field string, fields ...string) *CardSelect {
	cq.fields = append([]string{field}, fields...)
	return &CardSelect{CardQuery: cq}
}

func (cq *CardQuery) prepareQuery(ctx context.Context) error {
	for _, f := range cq.fields {
		if !card.ValidColumn(f) {
			return &ValidationError{Name: f, err: fmt.Errorf("ent: invalid field %q for query", f)}
		}
	}
	if cq.path != nil {
		prev, err := cq.path(ctx)
		if err != nil {
			return err
		}
		cq.sql = prev
	}
	return nil
}

func (cq *CardQuery) sqlAll(ctx context.Context) ([]*Card, error) {
	var (
		nodes       = []*Card{}
		withFKs     = cq.withFKs
		_spec       = cq.querySpec()
		loadedTypes = [2]bool{
			cq.withOwner != nil,
			cq.withSpec != nil,
		}
	)
	if cq.withOwner != nil {
		withFKs = true
	}
	if withFKs {
		_spec.Node.Columns = append(_spec.Node.Columns, card.ForeignKeys...)
	}
	_spec.ScanValues = func(columns []string) ([]interface{}, error) {
		node := &Card{config: cq.config}
		nodes = append(nodes, node)
		return node.scanValues(columns)
	}
	_spec.Assign = func(columns []string, values []interface{}) error {
		if len(nodes) == 0 {
			return fmt.Errorf("ent: Assign called without calling ScanValues")
		}
		node := nodes[len(nodes)-1]
		node.Edges.loadedTypes = loadedTypes
		return node.assignValues(columns, values)
	}
	if err := sqlgraph.QueryNodes(ctx, cq.driver, _spec); err != nil {
		return nil, err
	}
	if len(nodes) == 0 {
		return nodes, nil
	}

	if query := cq.withOwner; query != nil {
		ids := make([]int, 0, len(nodes))
		nodeids := make(map[int][]*Card)
		for i := range nodes {
			if fk := nodes[i].user_card; fk != nil {
				ids = append(ids, *fk)
				nodeids[*fk] = append(nodeids[*fk], nodes[i])
			}
		}
		query.Where(user.IDIn(ids...))
		neighbors, err := query.All(ctx)
		if err != nil {
			return nil, err
		}
		for _, n := range neighbors {
			nodes, ok := nodeids[n.ID]
			if !ok {
				return nil, fmt.Errorf(`unexpected foreign-key "user_card" returned %v`, n.ID)
			}
			for i := range nodes {
				nodes[i].Edges.Owner = n
			}
		}
	}

	if query := cq.withSpec; query != nil {
		fks := make([]driver.Value, 0, len(nodes))
		ids := make(map[int]*Card, len(nodes))
		for _, node := range nodes {
			ids[node.ID] = node
			fks = append(fks, node.ID)
			node.Edges.Spec = []*Spec{}
		}
		var (
			edgeids []int
			edges   = make(map[int][]*Card)
		)
		_spec := &sqlgraph.EdgeQuerySpec{
			Edge: &sqlgraph.EdgeSpec{
				Inverse: true,
				Table:   card.SpecTable,
				Columns: card.SpecPrimaryKey,
			},
			Predicate: func(s *sql.Selector) {
				s.Where(sql.InValues(card.SpecPrimaryKey[1], fks...))
			},

			ScanValues: func() [2]interface{} {
				return [2]interface{}{&sql.NullInt64{}, &sql.NullInt64{}}
			},
			Assign: func(out, in interface{}) error {
				eout, ok := out.(*sql.NullInt64)
				if !ok || eout == nil {
					return fmt.Errorf("unexpected id value for edge-out")
				}
				ein, ok := in.(*sql.NullInt64)
				if !ok || ein == nil {
					return fmt.Errorf("unexpected id value for edge-in")
				}
				outValue := int(eout.Int64)
				inValue := int(ein.Int64)
				node, ok := ids[outValue]
				if !ok {
					return fmt.Errorf("unexpected node id in edges: %v", outValue)
				}
				edgeids = append(edgeids, inValue)
				edges[inValue] = append(edges[inValue], node)
				return nil
			},
		}
		if err := sqlgraph.QueryEdges(ctx, cq.driver, _spec); err != nil {
			return nil, fmt.Errorf(`query edges "spec": %v`, err)
		}
		query.Where(spec.IDIn(edgeids...))
		neighbors, err := query.All(ctx)
		if err != nil {
			return nil, err
		}
		for _, n := range neighbors {
			nodes, ok := edges[n.ID]
			if !ok {
				return nil, fmt.Errorf(`unexpected "spec" node returned %v`, n.ID)
			}
			for i := range nodes {
				nodes[i].Edges.Spec = append(nodes[i].Edges.Spec, n)
			}
		}
	}

	return nodes, nil
}

func (cq *CardQuery) sqlCount(ctx context.Context) (int, error) {
	_spec := cq.querySpec()
	return sqlgraph.CountNodes(ctx, cq.driver, _spec)
}

func (cq *CardQuery) sqlExist(ctx context.Context) (bool, error) {
	n, err := cq.sqlCount(ctx)
	if err != nil {
		return false, fmt.Errorf("ent: check existence: %v", err)
	}
	return n > 0, nil
}

func (cq *CardQuery) querySpec() *sqlgraph.QuerySpec {
	_spec := &sqlgraph.QuerySpec{
		Node: &sqlgraph.NodeSpec{
			Table:   card.Table,
			Columns: card.Columns,
			ID: &sqlgraph.FieldSpec{
				Type:   field.TypeInt,
				Column: card.FieldID,
			},
		},
		From:   cq.sql,
		Unique: true,
	}
	if fields := cq.fields; len(fields) > 0 {
		_spec.Node.Columns = make([]string, 0, len(fields))
		_spec.Node.Columns = append(_spec.Node.Columns, card.FieldID)
		for i := range fields {
			if fields[i] != card.FieldID {
				_spec.Node.Columns = append(_spec.Node.Columns, fields[i])
			}
		}
	}
	if ps := cq.predicates; len(ps) > 0 {
		_spec.Predicate = func(selector *sql.Selector) {
			for i := range ps {
				ps[i](selector)
			}
		}
	}
	if limit := cq.limit; limit != nil {
		_spec.Limit = *limit
	}
	if offset := cq.offset; offset != nil {
		_spec.Offset = *offset
	}
	if ps := cq.order; len(ps) > 0 {
		_spec.Order = func(selector *sql.Selector) {
			for i := range ps {
				ps[i](selector, card.ValidColumn)
			}
		}
	}
	return _spec
}

func (cq *CardQuery) sqlQuery(ctx context.Context) *sql.Selector {
	builder := sql.Dialect(cq.driver.Dialect())
	t1 := builder.Table(card.Table)
	selector := builder.Select(t1.Columns(card.Columns...)...).From(t1)
	if cq.sql != nil {
		selector = cq.sql
		selector.Select(selector.Columns(card.Columns...)...)
	}
	for _, p := range cq.predicates {
		p(selector)
	}
	for _, p := range cq.order {
		p(selector, card.ValidColumn)
	}
	if offset := cq.offset; offset != nil {
		// limit is mandatory for offset clause. We start
		// with default value, and override it below if needed.
		selector.Offset(*offset).Limit(math.MaxInt32)
	}
	if limit := cq.limit; limit != nil {
		selector.Limit(*limit)
	}
	return selector
}

// CardGroupBy is the group-by builder for Card entities.
type CardGroupBy struct {
	config
	fields []string
	fns    []AggregateFunc
	// intermediate query (i.e. traversal path).
	sql  *sql.Selector
	path func(context.Context) (*sql.Selector, error)
}

// Aggregate adds the given aggregation functions to the group-by query.
func (cgb *CardGroupBy) Aggregate(fns ...AggregateFunc) *CardGroupBy {
	cgb.fns = append(cgb.fns, fns...)
	return cgb
}

// Scan applies the group-by query and scans the result into the given value.
func (cgb *CardGroupBy) Scan(ctx context.Context, v interface{}) error {
	query, err := cgb.path(ctx)
	if err != nil {
		return err
	}
	cgb.sql = query
	return cgb.sqlScan(ctx, v)
}

// ScanX is like Scan, but panics if an error occurs.
func (cgb *CardGroupBy) ScanX(ctx context.Context, v interface{}) {
	if err := cgb.Scan(ctx, v); err != nil {
		panic(err)
	}
}

// Strings returns list of strings from group-by.
// It is only allowed when executing a group-by query with one field.
func (cgb *CardGroupBy) Strings(ctx context.Context) ([]string, error) {
	if len(cgb.fields) > 1 {
		return nil, errors.New("ent: CardGroupBy.Strings is not achievable when grouping more than 1 field")
	}
	var v []string
	if err := cgb.Scan(ctx, &v); err != nil {
		return nil, err
	}
	return v, nil
}

// StringsX is like Strings, but panics if an error occurs.
func (cgb *CardGroupBy) StringsX(ctx context.Context) []string {
	v, err := cgb.Strings(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// String returns a single string from a group-by query.
// It is only allowed when executing a group-by query with one field.
func (cgb *CardGroupBy) String(ctx context.Context) (_ string, err error) {
	var v []string
	if v, err = cgb.Strings(ctx); err != nil {
		return
	}
	switch len(v) {
	case 1:
		return v[0], nil
	case 0:
		err = &NotFoundError{card.Label}
	default:
		err = fmt.Errorf("ent: CardGroupBy.Strings returned %d results when one was expected", len(v))
	}
	return
}

// StringX is like String, but panics if an error occurs.
func (cgb *CardGroupBy) StringX(ctx context.Context) string {
	v, err := cgb.String(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// Ints returns list of ints from group-by.
// It is only allowed when executing a group-by query with one field.
func (cgb *CardGroupBy) Ints(ctx context.Context) ([]int, error) {
	if len(cgb.fields) > 1 {
		return nil, errors.New("ent: CardGroupBy.Ints is not achievable when grouping more than 1 field")
	}
	var v []int
	if err := cgb.Scan(ctx, &v); err != nil {
		return nil, err
	}
	return v, nil
}

// IntsX is like Ints, but panics if an error occurs.
func (cgb *CardGroupBy) IntsX(ctx context.Context) []int {
	v, err := cgb.Ints(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// Int returns a single int from a group-by query.
// It is only allowed when executing a group-by query with one field.
func (cgb *CardGroupBy) Int(ctx context.Context) (_ int, err error) {
	var v []int
	if v, err = cgb.Ints(ctx); err != nil {
		return
	}
	switch len(v) {
	case 1:
		return v[0], nil
	case 0:
		err = &NotFoundError{card.Label}
	default:
		err = fmt.Errorf("ent: CardGroupBy.Ints returned %d results when one was expected", len(v))
	}
	return
}

// IntX is like Int, but panics if an error occurs.
func (cgb *CardGroupBy) IntX(ctx context.Context) int {
	v, err := cgb.Int(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// Float64s returns list of float64s from group-by.
// It is only allowed when executing a group-by query with one field.
func (cgb *CardGroupBy) Float64s(ctx context.Context) ([]float64, error) {
	if len(cgb.fields) > 1 {
		return nil, errors.New("ent: CardGroupBy.Float64s is not achievable when grouping more than 1 field")
	}
	var v []float64
	if err := cgb.Scan(ctx, &v); err != nil {
		return nil, err
	}
	return v, nil
}

// Float64sX is like Float64s, but panics if an error occurs.
func (cgb *CardGroupBy) Float64sX(ctx context.Context) []float64 {
	v, err := cgb.Float64s(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// Float64 returns a single float64 from a group-by query.
// It is only allowed when executing a group-by query with one field.
func (cgb *CardGroupBy) Float64(ctx context.Context) (_ float64, err error) {
	var v []float64
	if v, err = cgb.Float64s(ctx); err != nil {
		return
	}
	switch len(v) {
	case 1:
		return v[0], nil
	case 0:
		err = &NotFoundError{card.Label}
	default:
		err = fmt.Errorf("ent: CardGroupBy.Float64s returned %d results when one was expected", len(v))
	}
	return
}

// Float64X is like Float64, but panics if an error occurs.
func (cgb *CardGroupBy) Float64X(ctx context.Context) float64 {
	v, err := cgb.Float64(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// Bools returns list of bools from group-by.
// It is only allowed when executing a group-by query with one field.
func (cgb *CardGroupBy) Bools(ctx context.Context) ([]bool, error) {
	if len(cgb.fields) > 1 {
		return nil, errors.New("ent: CardGroupBy.Bools is not achievable when grouping more than 1 field")
	}
	var v []bool
	if err := cgb.Scan(ctx, &v); err != nil {
		return nil, err
	}
	return v, nil
}

// BoolsX is like Bools, but panics if an error occurs.
func (cgb *CardGroupBy) BoolsX(ctx context.Context) []bool {
	v, err := cgb.Bools(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// Bool returns a single bool from a group-by query.
// It is only allowed when executing a group-by query with one field.
func (cgb *CardGroupBy) Bool(ctx context.Context) (_ bool, err error) {
	var v []bool
	if v, err = cgb.Bools(ctx); err != nil {
		return
	}
	switch len(v) {
	case 1:
		return v[0], nil
	case 0:
		err = &NotFoundError{card.Label}
	default:
		err = fmt.Errorf("ent: CardGroupBy.Bools returned %d results when one was expected", len(v))
	}
	return
}

// BoolX is like Bool, but panics if an error occurs.
func (cgb *CardGroupBy) BoolX(ctx context.Context) bool {
	v, err := cgb.Bool(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

func (cgb *CardGroupBy) sqlScan(ctx context.Context, v interface{}) error {
	for _, f := range cgb.fields {
		if !card.ValidColumn(f) {
			return &ValidationError{Name: f, err: fmt.Errorf("invalid field %q for group-by", f)}
		}
	}
	selector := cgb.sqlQuery()
	if err := selector.Err(); err != nil {
		return err
	}
	rows := &sql.Rows{}
	query, args := selector.Query()
	if err := cgb.driver.Query(ctx, query, args, rows); err != nil {
		return err
	}
	defer rows.Close()
	return sql.ScanSlice(rows, v)
}

func (cgb *CardGroupBy) sqlQuery() *sql.Selector {
	selector := cgb.sql
	columns := make([]string, 0, len(cgb.fields)+len(cgb.fns))
	columns = append(columns, cgb.fields...)
	for _, fn := range cgb.fns {
		columns = append(columns, fn(selector, card.ValidColumn))
	}
	return selector.Select(columns...).GroupBy(cgb.fields...)
}

// CardSelect is the builder for selecting fields of Card entities.
type CardSelect struct {
	*CardQuery
	// intermediate query (i.e. traversal path).
	sql *sql.Selector
}

// Scan applies the selector query and scans the result into the given value.
func (cs *CardSelect) Scan(ctx context.Context, v interface{}) error {
	if err := cs.prepareQuery(ctx); err != nil {
		return err
	}
	cs.sql = cs.CardQuery.sqlQuery(ctx)
	return cs.sqlScan(ctx, v)
}

// ScanX is like Scan, but panics if an error occurs.
func (cs *CardSelect) ScanX(ctx context.Context, v interface{}) {
	if err := cs.Scan(ctx, v); err != nil {
		panic(err)
	}
}

// Strings returns list of strings from a selector. It is only allowed when selecting one field.
func (cs *CardSelect) Strings(ctx context.Context) ([]string, error) {
	if len(cs.fields) > 1 {
		return nil, errors.New("ent: CardSelect.Strings is not achievable when selecting more than 1 field")
	}
	var v []string
	if err := cs.Scan(ctx, &v); err != nil {
		return nil, err
	}
	return v, nil
}

// StringsX is like Strings, but panics if an error occurs.
func (cs *CardSelect) StringsX(ctx context.Context) []string {
	v, err := cs.Strings(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// String returns a single string from a selector. It is only allowed when selecting one field.
func (cs *CardSelect) String(ctx context.Context) (_ string, err error) {
	var v []string
	if v, err = cs.Strings(ctx); err != nil {
		return
	}
	switch len(v) {
	case 1:
		return v[0], nil
	case 0:
		err = &NotFoundError{card.Label}
	default:
		err = fmt.Errorf("ent: CardSelect.Strings returned %d results when one was expected", len(v))
	}
	return
}

// StringX is like String, but panics if an error occurs.
func (cs *CardSelect) StringX(ctx context.Context) string {
	v, err := cs.String(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// Ints returns list of ints from a selector. It is only allowed when selecting one field.
func (cs *CardSelect) Ints(ctx context.Context) ([]int, error) {
	if len(cs.fields) > 1 {
		return nil, errors.New("ent: CardSelect.Ints is not achievable when selecting more than 1 field")
	}
	var v []int
	if err := cs.Scan(ctx, &v); err != nil {
		return nil, err
	}
	return v, nil
}

// IntsX is like Ints, but panics if an error occurs.
func (cs *CardSelect) IntsX(ctx context.Context) []int {
	v, err := cs.Ints(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// Int returns a single int from a selector. It is only allowed when selecting one field.
func (cs *CardSelect) Int(ctx context.Context) (_ int, err error) {
	var v []int
	if v, err = cs.Ints(ctx); err != nil {
		return
	}
	switch len(v) {
	case 1:
		return v[0], nil
	case 0:
		err = &NotFoundError{card.Label}
	default:
		err = fmt.Errorf("ent: CardSelect.Ints returned %d results when one was expected", len(v))
	}
	return
}

// IntX is like Int, but panics if an error occurs.
func (cs *CardSelect) IntX(ctx context.Context) int {
	v, err := cs.Int(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// Float64s returns list of float64s from a selector. It is only allowed when selecting one field.
func (cs *CardSelect) Float64s(ctx context.Context) ([]float64, error) {
	if len(cs.fields) > 1 {
		return nil, errors.New("ent: CardSelect.Float64s is not achievable when selecting more than 1 field")
	}
	var v []float64
	if err := cs.Scan(ctx, &v); err != nil {
		return nil, err
	}
	return v, nil
}

// Float64sX is like Float64s, but panics if an error occurs.
func (cs *CardSelect) Float64sX(ctx context.Context) []float64 {
	v, err := cs.Float64s(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// Float64 returns a single float64 from a selector. It is only allowed when selecting one field.
func (cs *CardSelect) Float64(ctx context.Context) (_ float64, err error) {
	var v []float64
	if v, err = cs.Float64s(ctx); err != nil {
		return
	}
	switch len(v) {
	case 1:
		return v[0], nil
	case 0:
		err = &NotFoundError{card.Label}
	default:
		err = fmt.Errorf("ent: CardSelect.Float64s returned %d results when one was expected", len(v))
	}
	return
}

// Float64X is like Float64, but panics if an error occurs.
func (cs *CardSelect) Float64X(ctx context.Context) float64 {
	v, err := cs.Float64(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// Bools returns list of bools from a selector. It is only allowed when selecting one field.
func (cs *CardSelect) Bools(ctx context.Context) ([]bool, error) {
	if len(cs.fields) > 1 {
		return nil, errors.New("ent: CardSelect.Bools is not achievable when selecting more than 1 field")
	}
	var v []bool
	if err := cs.Scan(ctx, &v); err != nil {
		return nil, err
	}
	return v, nil
}

// BoolsX is like Bools, but panics if an error occurs.
func (cs *CardSelect) BoolsX(ctx context.Context) []bool {
	v, err := cs.Bools(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// Bool returns a single bool from a selector. It is only allowed when selecting one field.
func (cs *CardSelect) Bool(ctx context.Context) (_ bool, err error) {
	var v []bool
	if v, err = cs.Bools(ctx); err != nil {
		return
	}
	switch len(v) {
	case 1:
		return v[0], nil
	case 0:
		err = &NotFoundError{card.Label}
	default:
		err = fmt.Errorf("ent: CardSelect.Bools returned %d results when one was expected", len(v))
	}
	return
}

// BoolX is like Bool, but panics if an error occurs.
func (cs *CardSelect) BoolX(ctx context.Context) bool {
	v, err := cs.Bool(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

func (cs *CardSelect) sqlScan(ctx context.Context, v interface{}) error {
	rows := &sql.Rows{}
	query, args := cs.sqlQuery().Query()
	if err := cs.driver.Query(ctx, query, args, rows); err != nil {
		return err
	}
	defer rows.Close()
	return sql.ScanSlice(rows, v)
}

func (cs *CardSelect) sqlQuery() sql.Querier {
	selector := cs.sql
	selector.Select(selector.Columns(cs.fields...)...)
	return selector
}