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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.
package schema
import (
"entgo.io/ent"
"entgo.io/ent/schema"
"entgo.io/ent/schema/edge"
"entgo.io/ent/schema/field"
"entgo.io/ent/schema/index"
)
// Relationship holds the schema definition for the Relationship entity.
type Relationship struct {
ent.Schema
}
func (Relationship) Annotations() []schema.Annotation {
return []schema.Annotation{
field.ID("user_id", "relative_id"),
}
}
// Fields of the Relationship.
func (Relationship) Fields() []ent.Field {
return []ent.Field{
field.Int("weight").
Default(1),
// Edge fields for the fields that compose this edge.
// They also function as the primary key of the table.
field.Int("user_id"),
field.Int("relative_id"),
// An edge field to external node that holds
// additional information about this edge.
field.Int("info_id").
Optional(),
}
}
// Edges of the Relationship.
func (Relationship) Edges() []ent.Edge {
return []ent.Edge{
edge.To("user", User.Type).
Required().
Unique().
Field("user_id"),
edge.To("relative", User.Type).
Required().
Unique().
Field("relative_id"),
// An optional edge to an entity that holds
// information about this relationship.
edge.To("info", RelationshipInfo.Type).
Field("info_id").
Unique(),
}
}
// Indexes of the Relationship.
func (Relationship) Indexes() []ent.Index {
return []ent.Index{
index.Fields("weight"),
// A relationship-info can be connected to no more
// than one relationship object (and edge schema).
index.Edges("info").
Unique(),
}
}
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