// 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 (
	"context"
	"encoding/json"
	"errors"
	"fmt"
	"sync"
	"time"

	"entgo.io/ent"
	"entgo.io/ent/entc/integration/edgefield/ent/car"
	"entgo.io/ent/entc/integration/edgefield/ent/card"
	"entgo.io/ent/entc/integration/edgefield/ent/info"
	"entgo.io/ent/entc/integration/edgefield/ent/metadata"
	"entgo.io/ent/entc/integration/edgefield/ent/node"
	"entgo.io/ent/entc/integration/edgefield/ent/pet"
	"entgo.io/ent/entc/integration/edgefield/ent/post"
	"entgo.io/ent/entc/integration/edgefield/ent/rental"
	"entgo.io/ent/entc/integration/edgefield/ent/user"
	"github.com/google/uuid"
)

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

	// Node types.
	TypeCar      = "Car"
	TypeCard     = "Card"
	TypeInfo     = "Info"
	TypeMetadata = "Metadata"
	TypeNode     = "Node"
	TypePet      = "Pet"
	TypePost     = "Post"
	TypeRental   = "Rental"
	TypeUser     = "User"
)

// CarMutation represents an operation that mutates the Car nodes in the graph.
type CarMutation struct {
	car.Mutation
	config
	id       *uuid.UUID
	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
}

// SetID sets the value of the id field. Note that this
// operation is only accepted on creation of Car entities.
func (m *CarMutation) SetID(id uuid.UUID) {
	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 *CarMutation) ID() (id uuid.UUID, exists bool) {
	if m.id == nil {
		return
	}
	return *m.id, true
}

// withCarID sets the ID field of the mutation.
func withCarID(id uuid.UUID) 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("ent: 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) ([]uuid.UUID, error) {
	switch {
	case m.Op().Is(OpUpdateOne | OpDeleteOne):
		id, exists := m.ID()
		if exists {
			return []uuid.UUID{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())
	}
}

// OldNumber returns the old "number" 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) OldNumber(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldNumber is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldNumber requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldNumber: %w", err)
	}
	return oldValue.Number, 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.FieldNumber:
		return m.OldNumber(ctx)
	}
	return nil, fmt.Errorf("unknown Car field %s", name)
}

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

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

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

// newCardMutation creates new mutation for the Card entity.
func newCardMutation(c config, op Op, opts ...cardOption) *CardMutation {
	m := &CardMutation{
		Mutation: *card.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 *CardMutation) ID() (id int, exists bool) {
	if m.id == nil {
		return
	}
	return *m.id, true
}

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

// withCard sets the old Card of the mutation.
func withCard(node *Card) cardOption {
	return func(m *CardMutation) {
		m.oldValue = func(context.Context) (*Card, 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 CardMutation) 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 CardMutation) Tx() (*Tx, error) {
	if _, ok := m.driver.(*txDriver); !ok {
		return nil, errors.New("ent: 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 *CardMutation) 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().Card.Query().Where(m.Predicates()...).IDs(ctx)
	default:
		return nil, fmt.Errorf("IDs is not allowed on %s operations", m.Op())
	}
}

// OldNumber returns the old "number" field's value of the Card entity.
// If the Card 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 *CardMutation) OldNumber(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldNumber is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldNumber requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldNumber: %w", err)
	}
	return oldValue.Number, nil
}

// OldOwnerID returns the old "owner_id" field's value of the Card entity.
// If the Card 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 *CardMutation) OldOwnerID(ctx context.Context) (v int, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldOwnerID is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldOwnerID requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldOwnerID: %w", err)
	}
	return oldValue.OwnerID, 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 *CardMutation) OldField(ctx context.Context, name string) (ent.Value, error) {
	switch name {
	case card.FieldNumber:
		return m.OldNumber(ctx)
	case card.FieldOwnerID:
		return m.OldOwnerID(ctx)
	}
	return nil, fmt.Errorf("unknown Card field %s", name)
}

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

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

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

// newInfoMutation creates new mutation for the Info entity.
func newInfoMutation(c config, op Op, opts ...infoOption) *InfoMutation {
	m := &InfoMutation{
		Mutation: *info.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 Info entities.
func (m *InfoMutation) 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 *InfoMutation) ID() (id int, exists bool) {
	if m.id == nil {
		return
	}
	return *m.id, true
}

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

// withInfo sets the old Info of the mutation.
func withInfo(node *Info) infoOption {
	return func(m *InfoMutation) {
		m.oldValue = func(context.Context) (*Info, 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 InfoMutation) 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 InfoMutation) Tx() (*Tx, error) {
	if _, ok := m.driver.(*txDriver); !ok {
		return nil, errors.New("ent: 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 *InfoMutation) 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().Info.Query().Where(m.Predicates()...).IDs(ctx)
	default:
		return nil, fmt.Errorf("IDs is not allowed on %s operations", m.Op())
	}
}

// OldContent returns the old "content" field's value of the Info entity.
// If the Info 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 *InfoMutation) OldContent(ctx context.Context) (v json.RawMessage, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldContent is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldContent requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldContent: %w", err)
	}
	return oldValue.Content, 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 *InfoMutation) OldField(ctx context.Context, name string) (ent.Value, error) {
	switch name {
	case info.FieldContent:
		return m.OldContent(ctx)
	}
	return nil, fmt.Errorf("unknown Info field %s", name)
}

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

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

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

// newMetadataMutation creates new mutation for the Metadata entity.
func newMetadataMutation(c config, op Op, opts ...metadataOption) *MetadataMutation {
	m := &MetadataMutation{
		Mutation: *metadata.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 Metadata entities.
func (m *MetadataMutation) 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 *MetadataMutation) ID() (id int, exists bool) {
	if m.id == nil {
		return
	}
	return *m.id, true
}

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

// withMetadata sets the old Metadata of the mutation.
func withMetadata(node *Metadata) metadataOption {
	return func(m *MetadataMutation) {
		m.oldValue = func(context.Context) (*Metadata, 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 MetadataMutation) 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 MetadataMutation) Tx() (*Tx, error) {
	if _, ok := m.driver.(*txDriver); !ok {
		return nil, errors.New("ent: 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 *MetadataMutation) 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().Metadata.Query().Where(m.Predicates()...).IDs(ctx)
	default:
		return nil, fmt.Errorf("IDs is not allowed on %s operations", m.Op())
	}
}

// OldAge returns the old "age" field's value of the Metadata entity.
// If the Metadata 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 *MetadataMutation) 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
}

// OldParentID returns the old "parent_id" field's value of the Metadata entity.
// If the Metadata 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 *MetadataMutation) OldParentID(ctx context.Context) (v int, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldParentID is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldParentID requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldParentID: %w", err)
	}
	return oldValue.ParentID, 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 *MetadataMutation) OldField(ctx context.Context, name string) (ent.Value, error) {
	switch name {
	case metadata.FieldAge:
		return m.OldAge(ctx)
	case metadata.FieldParentID:
		return m.OldParentID(ctx)
	}
	return nil, fmt.Errorf("unknown Metadata field %s", name)
}

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

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

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

// newNodeMutation creates new mutation for the Node entity.
func newNodeMutation(c config, op Op, opts ...nodeOption) *NodeMutation {
	m := &NodeMutation{
		Mutation: *node.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 *NodeMutation) ID() (id int, exists bool) {
	if m.id == nil {
		return
	}
	return *m.id, true
}

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

// withNode sets the old Node of the mutation.
func withNode(node *Node) nodeOption {
	return func(m *NodeMutation) {
		m.oldValue = func(context.Context) (*Node, 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 NodeMutation) 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 NodeMutation) Tx() (*Tx, error) {
	if _, ok := m.driver.(*txDriver); !ok {
		return nil, errors.New("ent: 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 *NodeMutation) 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().Node.Query().Where(m.Predicates()...).IDs(ctx)
	default:
		return nil, fmt.Errorf("IDs is not allowed on %s operations", m.Op())
	}
}

// OldValue returns the old "value" field's value of the Node entity.
// If the Node 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 *NodeMutation) OldValue(ctx context.Context) (v int, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldValue is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldValue requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldValue: %w", err)
	}
	return oldValue.Value, nil
}

// OldPrevID returns the old "prev_id" field's value of the Node entity.
// If the Node 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 *NodeMutation) OldPrevID(ctx context.Context) (v int, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldPrevID is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldPrevID requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldPrevID: %w", err)
	}
	return oldValue.PrevID, 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 *NodeMutation) OldField(ctx context.Context, name string) (ent.Value, error) {
	switch name {
	case node.FieldValue:
		return m.OldValue(ctx)
	case node.FieldPrevID:
		return m.OldPrevID(ctx)
	}
	return nil, fmt.Errorf("unknown Node 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("ent: 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())
	}
}

// OldOwnerID returns the old "owner_id" 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) OldOwnerID(ctx context.Context) (v int, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldOwnerID is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldOwnerID requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldOwnerID: %w", err)
	}
	return oldValue.OwnerID, 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.FieldOwnerID:
		return m.OldOwnerID(ctx)
	}
	return nil, fmt.Errorf("unknown Pet field %s", name)
}

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

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

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

// newPostMutation creates new mutation for the Post entity.
func newPostMutation(c config, op Op, opts ...postOption) *PostMutation {
	m := &PostMutation{
		Mutation: *post.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 *PostMutation) ID() (id int, exists bool) {
	if m.id == nil {
		return
	}
	return *m.id, true
}

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

// withPost sets the old Post of the mutation.
func withPost(node *Post) postOption {
	return func(m *PostMutation) {
		m.oldValue = func(context.Context) (*Post, 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 PostMutation) 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 PostMutation) Tx() (*Tx, error) {
	if _, ok := m.driver.(*txDriver); !ok {
		return nil, errors.New("ent: 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 *PostMutation) 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().Post.Query().Where(m.Predicates()...).IDs(ctx)
	default:
		return nil, fmt.Errorf("IDs is not allowed on %s operations", m.Op())
	}
}

// OldText returns the old "text" field's value of the Post entity.
// If the Post 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 *PostMutation) 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
}

// OldAuthorID returns the old "author_id" field's value of the Post entity.
// If the Post 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 *PostMutation) OldAuthorID(ctx context.Context) (v *int, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldAuthorID is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldAuthorID requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldAuthorID: %w", err)
	}
	return oldValue.AuthorID, 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 *PostMutation) OldField(ctx context.Context, name string) (ent.Value, error) {
	switch name {
	case post.FieldText:
		return m.OldText(ctx)
	case post.FieldAuthorID:
		return m.OldAuthorID(ctx)
	}
	return nil, fmt.Errorf("unknown Post field %s", name)
}

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

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

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

// newRentalMutation creates new mutation for the Rental entity.
func newRentalMutation(c config, op Op, opts ...rentalOption) *RentalMutation {
	m := &RentalMutation{
		Mutation: *rental.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 *RentalMutation) ID() (id int, exists bool) {
	if m.id == nil {
		return
	}
	return *m.id, true
}

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

// withRental sets the old Rental of the mutation.
func withRental(node *Rental) rentalOption {
	return func(m *RentalMutation) {
		m.oldValue = func(context.Context) (*Rental, 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 RentalMutation) 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 RentalMutation) Tx() (*Tx, error) {
	if _, ok := m.driver.(*txDriver); !ok {
		return nil, errors.New("ent: 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 *RentalMutation) 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().Rental.Query().Where(m.Predicates()...).IDs(ctx)
	default:
		return nil, fmt.Errorf("IDs is not allowed on %s operations", m.Op())
	}
}

// OldDate returns the old "date" field's value of the Rental entity.
// If the Rental 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 *RentalMutation) OldDate(ctx context.Context) (v time.Time, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldDate is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldDate requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldDate: %w", err)
	}
	return oldValue.Date, nil
}

// OldUserID returns the old "user_id" field's value of the Rental entity.
// If the Rental 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 *RentalMutation) OldUserID(ctx context.Context) (v int, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldUserID is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldUserID requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldUserID: %w", err)
	}
	return oldValue.UserID, nil
}

// OldCarID returns the old "car_id" field's value of the Rental entity.
// If the Rental 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 *RentalMutation) OldCarID(ctx context.Context) (v uuid.UUID, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldCarID is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldCarID requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldCarID: %w", err)
	}
	return oldValue.CarID, 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 *RentalMutation) OldField(ctx context.Context, name string) (ent.Value, error) {
	switch name {
	case rental.FieldDate:
		return m.OldDate(ctx)
	case rental.FieldUserID:
		return m.OldUserID(ctx)
	case rental.FieldCarID:
		return m.OldCarID(ctx)
	}
	return nil, fmt.Errorf("unknown Rental 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("ent: 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())
	}
}

// OldParentID returns the old "parent_id" 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) OldParentID(ctx context.Context) (v int, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldParentID is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldParentID requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldParentID: %w", err)
	}
	return oldValue.ParentID, nil
}

// OldSpouseID returns the old "spouse_id" 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) OldSpouseID(ctx context.Context) (v int, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldSpouseID is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldSpouseID requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldSpouseID: %w", err)
	}
	return oldValue.SpouseID, 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.FieldParentID:
		return m.OldParentID(ctx)
	case user.FieldSpouseID:
		return m.OldSpouseID(ctx)
	}
	return nil, fmt.Errorf("unknown User field %s", name)
}