// 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.

package schema

import (
	"entgo.io/ent"
	"entgo.io/ent/schema/edge"
	"entgo.io/ent/schema/field"
)

// Node holds the schema definition for the Node entity.
type Node struct {
	ent.Schema
}

// Fields of the Node.
func (Node) Fields() []ent.Field {
	return []ent.Field{
		field.Int("value"),
		field.Int("parent_id").
			Optional(),
	}
}

// Edges of the Node.
func (Node) Edges() []ent.Edge {
	return []ent.Edge{
		edge.To("children", Node.Type).
			From("parent").
			Field("parent_id").
			Unique(),
	}
}