82 lines
1.9 KiB
Go
82 lines
1.9 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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)
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// An example for an edge-schema (AttachedFile) that uses a custom name for its edges
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// (not foreign-keys) and Ent matches by the schema types and not foreign-key names.
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// Process holds the edge schema definition of the Process relationship.
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type Process struct {
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ent.Schema
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}
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// Edges of the Process.
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func (Process) Edges() []ent.Edge {
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return []ent.Edge{
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edge.To("files", File.Type).
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Through("attached_files", AttachedFile.Type).
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Comment("Files that were attached by this process"),
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}
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}
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// File holds the edge schema definition of the File relationship.
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type File struct {
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ent.Schema
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}
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// Fields of the File.
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func (File) Fields() []ent.Field {
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return []ent.Field{
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field.String("name"),
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}
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}
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// Edges of the File.
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func (File) Edges() []ent.Edge {
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return []ent.Edge{
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edge.From("processes", Process.Type).
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Ref("files"),
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}
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}
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// AttachedFile holds the edge schema definition of the File relationship.
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type AttachedFile struct {
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ent.Schema
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}
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// Fields of the AttachedFile.
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func (AttachedFile) Fields() []ent.Field {
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return []ent.Field{
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field.Time("attach_time").
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Default(time.Now),
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field.Int("f_id"),
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field.Int("proc_id"),
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}
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}
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// Edges of the AttachedFile.
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func (AttachedFile) Edges() []ent.Edge {
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return []ent.Edge{
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// Note: the two following edges use different name conventions (e.g., f_id <> file_id), but
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// Ent knows how to resolve this as there is only one usage of each type in this declaration.
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edge.To("fi", File.Type).
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Required().
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Unique().
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Field("f_id"),
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edge.To("proc", Process.Type).
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Required().
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Unique().
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Field("proc_id"),
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}
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}
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