64 lines
1.5 KiB
Go
64 lines
1.5 KiB
Go
// Copyright 2019-present Facebook Inc. All rights reserved.
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// This source code is licensed under the Apache 2.0 license found
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// in the LICENSE file in the root directory of this source tree.
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package schema
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import (
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"time"
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"entgo.io/ent"
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"entgo.io/ent/schema/edge"
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"entgo.io/ent/schema/field"
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"entgo.io/ent/schema/index"
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)
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// Friendship holds the edge schema definition of the Friendship relationship.
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type Friendship struct {
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ent.Schema
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}
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// Fields of the Friendship.
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func (Friendship) Fields() []ent.Field {
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return []ent.Field{
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field.Int("weight").
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Default(1),
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field.Time("created_at").
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Default(time.Now),
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field.Int("user_id").
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Immutable(),
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field.Int("friend_id").
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Immutable(),
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}
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}
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// Edges of the Friendship.
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func (Friendship) Edges() []ent.Edge {
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return []ent.Edge{
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edge.To("user", User.Type).
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Unique().
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Required().
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Immutable().
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Field("user_id"),
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edge.To("friend", User.Type).
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Unique().
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Required().
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Immutable().
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Field("friend_id"),
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}
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}
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// Indexes of the Friendship.
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func (Friendship) Indexes() []ent.Index {
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return []ent.Index{
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index.Fields("created_at"),
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// By default, Ent generates a unique index named <T>_<FK1>_<FK2>
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// for edge-schemas with an ID field to enforce the uniqueness of
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// the edges reside in the join table. However, in this case it is
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// skipped because we define it explicitly in the definition below.
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index.Fields("user_id", "friend_id").
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Unique().
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StorageKey("friendships_edge"),
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}
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}
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