ent/examples/edgeindex/ent/street.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 ent, DO NOT EDIT.

package ent

import (
	"fmt"
	"strings"

	"entgo.io/ent/dialect/sql"
	"entgo.io/ent/examples/edgeindex/ent/city"
	"entgo.io/ent/examples/edgeindex/ent/street"
)

// Street is the model entity for the Street schema.
type Street struct {
	config `json:"-"`
	// ID of the ent.
	ID int `json:"id,omitempty"`
	// Name holds the value of the "name" field.
	Name string `json:"name,omitempty"`
	// Edges holds the relations/edges for other nodes in the graph.
	// The values are being populated by the StreetQuery when eager-loading is set.
	Edges        StreetEdges `json:"edges"`
	city_streets *int
}

// StreetEdges holds the relations/edges for other nodes in the graph.
type StreetEdges struct {
	// City holds the value of the city edge.
	City *City `json:"city,omitempty"`
	// loadedTypes holds the information for reporting if a
	// type was loaded (or requested) in eager-loading or not.
	loadedTypes [1]bool
}

// CityOrErr returns the City value or an error if the edge
// was not loaded in eager-loading, or loaded but was not found.
func (e StreetEdges) CityOrErr() (*City, error) {
	if e.loadedTypes[0] {
		if e.City == nil {
			// The edge city was loaded in eager-loading,
			// but was not found.
			return nil, &NotFoundError{label: city.Label}
		}
		return e.City, nil
	}
	return nil, &NotLoadedError{edge: "city"}
}

// scanValues returns the types for scanning values from sql.Rows.
func (*Street) scanValues(columns []string) ([]interface{}, error) {
	values := make([]interface{}, len(columns))
	for i := range columns {
		switch columns[i] {
		case street.FieldID:
			values[i] = new(sql.NullInt64)
		case street.FieldName:
			values[i] = new(sql.NullString)
		case street.ForeignKeys[0]: // city_streets
			values[i] = new(sql.NullInt64)
		default:
			return nil, fmt.Errorf("unexpected column %q for type Street", columns[i])
		}
	}
	return values, nil
}

// assignValues assigns the values that were returned from sql.Rows (after scanning)
// to the Street fields.
func (s *Street) assignValues(columns []string, values []interface{}) error {
	if m, n := len(values), len(columns); m < n {
		return fmt.Errorf("mismatch number of scan values: %d != %d", m, n)
	}
	for i := range columns {
		switch columns[i] {
		case street.FieldID:
			value, ok := values[i].(*sql.NullInt64)
			if !ok {
				return fmt.Errorf("unexpected type %T for field id", value)
			}
			s.ID = int(value.Int64)
		case street.FieldName:
			if value, ok := values[i].(*sql.NullString); !ok {
				return fmt.Errorf("unexpected type %T for field name", values[i])
			} else if value.Valid {
				s.Name = value.String
			}
		case street.ForeignKeys[0]:
			if value, ok := values[i].(*sql.NullInt64); !ok {
				return fmt.Errorf("unexpected type %T for edge-field city_streets", value)
			} else if value.Valid {
				s.city_streets = new(int)
				*s.city_streets = int(value.Int64)
			}
		}
	}
	return nil
}

// QueryCity queries the "city" edge of the Street entity.
func (s *Street) QueryCity() *CityQuery {
	return (&StreetClient{config: s.config}).QueryCity(s)
}

// Update returns a builder for updating this Street.
// Note that you need to call Street.Unwrap() before calling this method if this Street
// was returned from a transaction, and the transaction was committed or rolled back.
func (s *Street) Update() *StreetUpdateOne {
	return (&StreetClient{config: s.config}).UpdateOne(s)
}

// Unwrap unwraps the Street entity that was returned from a transaction after it was closed,
// so that all future queries will be executed through the driver which created the transaction.
func (s *Street) Unwrap() *Street {
	_tx, ok := s.config.driver.(*txDriver)
	if !ok {
		panic("ent: Street is not a transactional entity")
	}
	s.config.driver = _tx.drv
	return s
}

// String implements the fmt.Stringer.
func (s *Street) String() string {
	var builder strings.Builder
	builder.WriteString("Street(")
	builder.WriteString(fmt.Sprintf("id=%v, ", s.ID))
	builder.WriteString("name=")
	builder.WriteString(s.Name)
	builder.WriteByte(')')
	return builder.String()
}

// Streets is a parsable slice of Street.
type Streets []*Street

func (s Streets) config(cfg config) {
	for _i := range s {
		s[_i].config = cfg
	}
}