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node.go
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node.go
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// 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 (
"fmt"
"strings"
"github.com/facebook/ent/dialect/sql"
"github.com/facebook/ent/examples/o2orecur/ent/node"
)
// Node is the model entity for the Node schema.
type Node struct {
config `json:"-"`
// ID of the ent.
ID int `json:"id,omitempty"`
// Value holds the value of the "value" field.
Value int `json:"value,omitempty"`
// Edges holds the relations/edges for other nodes in the graph.
// The values are being populated by the NodeQuery when eager-loading is set.
Edges NodeEdges `json:"edges"`
node_next *int
}
// NodeEdges holds the relations/edges for other nodes in the graph.
type NodeEdges struct {
// Prev holds the value of the prev edge.
Prev *Node
// Next holds the value of the next edge.
Next *Node
// loadedTypes holds the information for reporting if a
// type was loaded (or requested) in eager-loading or not.
loadedTypes [2]bool
}
// PrevOrErr returns the Prev value or an error if the edge
// was not loaded in eager-loading, or loaded but was not found.
func (e NodeEdges) PrevOrErr() (*Node, error) {
if e.loadedTypes[0] {
if e.Prev == nil {
// The edge prev was loaded in eager-loading,
// but was not found.
return nil, &NotFoundError{label: node.Label}
}
return e.Prev, nil
}
return nil, &NotLoadedError{edge: "prev"}
}
// NextOrErr returns the Next value or an error if the edge
// was not loaded in eager-loading, or loaded but was not found.
func (e NodeEdges) NextOrErr() (*Node, error) {
if e.loadedTypes[1] {
if e.Next == nil {
// The edge next was loaded in eager-loading,
// but was not found.
return nil, &NotFoundError{label: node.Label}
}
return e.Next, nil
}
return nil, &NotLoadedError{edge: "next"}
}
// scanValues returns the types for scanning values from sql.Rows.
func (*Node) scanValues() []interface{} {
return []interface{}{
&sql.NullInt64{}, // id
&sql.NullInt64{}, // value
}
}
// fkValues returns the types for scanning foreign-keys values from sql.Rows.
func (*Node) fkValues() []interface{} {
return []interface{}{
&sql.NullInt64{}, // node_next
}
}
// assignValues assigns the values that were returned from sql.Rows (after scanning)
// to the Node fields.
func (n *Node) assignValues(values ...interface{}) error {
if m, n := len(values), len(node.Columns); m < n {
return fmt.Errorf("mismatch number of scan values: %d != %d", m, n)
}
value, ok := values[0].(*sql.NullInt64)
if !ok {
return fmt.Errorf("unexpected type %T for field id", value)
}
n.ID = int(value.Int64)
values = values[1:]
if value, ok := values[0].(*sql.NullInt64); !ok {
return fmt.Errorf("unexpected type %T for field value", values[0])
} else if value.Valid {
n.Value = int(value.Int64)
}
values = values[1:]
if len(values) == len(node.ForeignKeys) {
if value, ok := values[0].(*sql.NullInt64); !ok {
return fmt.Errorf("unexpected type %T for edge-field node_next", value)
} else if value.Valid {
n.node_next = new(int)
*n.node_next = int(value.Int64)
}
}
return nil
}
// QueryPrev queries the prev edge of the Node.
func (n *Node) QueryPrev() *NodeQuery {
return (&NodeClient{config: n.config}).QueryPrev(n)
}
// QueryNext queries the next edge of the Node.
func (n *Node) QueryNext() *NodeQuery {
return (&NodeClient{config: n.config}).QueryNext(n)
}
// Update returns a builder for updating this Node.
// Note that, you need to call Node.Unwrap() before calling this method, if this Node
// was returned from a transaction, and the transaction was committed or rolled back.
func (n *Node) Update() *NodeUpdateOne {
return (&NodeClient{config: n.config}).UpdateOne(n)
}
// Unwrap unwraps the entity that was returned from a transaction after it was closed,
// so that all next queries will be executed through the driver which created the transaction.
func (n *Node) Unwrap() *Node {
tx, ok := n.config.driver.(*txDriver)
if !ok {
panic("ent: Node is not a transactional entity")
}
n.config.driver = tx.drv
return n
}
// String implements the fmt.Stringer.
func (n *Node) String() string {
var builder strings.Builder
builder.WriteString("Node(")
builder.WriteString(fmt.Sprintf("id=%v", n.ID))
builder.WriteString(", value=")
builder.WriteString(fmt.Sprintf("%v", n.Value))
builder.WriteByte(')')
return builder.String()
}
// Nodes is a parsable slice of Node.
type Nodes []*Node
func (n Nodes) config(cfg config) {
for _i := range n {
n[_i].config = cfg
}
}