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128 lines
3.0 KiB
Go
128 lines
3.0 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 mixin
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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"
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"entgo.io/ent/schema/field"
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)
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// Schema is the default implementation for the ent.Mixin interface.
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// It should be embedded in end-user mixin as follows:
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//
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// type M struct {
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// mixin.Schema
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// }
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type Schema struct{}
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// Fields of the mixin.
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func (Schema) Fields() []ent.Field { return nil }
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// Edges of the mixin.
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func (Schema) Edges() []ent.Edge { return nil }
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// Indexes of the mixin.
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func (Schema) Indexes() []ent.Index { return nil }
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// Hooks of the mixin.
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func (Schema) Hooks() []ent.Hook { return nil }
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// Interceptors of the schema.
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func (Schema) Interceptors() []ent.Interceptor { return nil }
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// Policy of the mixin.
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func (Schema) Policy() ent.Policy { return nil }
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// Annotations of the mixin.
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func (Schema) Annotations() []schema.Annotation { return nil }
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// schema mixin must implement `Mixin` interface.
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var _ ent.Mixin = (*Schema)(nil)
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// CreateTime adds created at time field.
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type CreateTime struct{ Schema }
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// Fields of the create time mixin.
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func (CreateTime) Fields() []ent.Field {
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return []ent.Field{
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field.Time("create_time").
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Default(time.Now).
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Immutable(),
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}
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}
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// create time mixin must implement `Mixin` interface.
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var _ ent.Mixin = (*CreateTime)(nil)
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// UpdateTime adds updated at time field.
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type UpdateTime struct{ Schema }
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// Fields of the update time mixin.
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func (UpdateTime) Fields() []ent.Field {
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return []ent.Field{
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field.Time("update_time").
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Default(time.Now).
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UpdateDefault(time.Now),
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}
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}
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// update time mixin must implement `Mixin` interface.
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var _ ent.Mixin = (*UpdateTime)(nil)
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// Time composes create/update time mixin.
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type Time struct{ Schema }
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// Fields of the time mixin.
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func (Time) Fields() []ent.Field {
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return append(
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CreateTime{}.Fields(),
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UpdateTime{}.Fields()...,
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)
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}
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// time mixin must implement `Mixin` interface.
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var _ ent.Mixin = (*Time)(nil)
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// AnnotateFields adds field annotations to underlying mixin fields.
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func AnnotateFields(m ent.Mixin, annotations ...schema.Annotation) ent.Mixin {
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return fieldAnnotator{Mixin: m, annotations: annotations}
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}
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// AnnotateEdges adds edge annotations to underlying mixin edges.
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func AnnotateEdges(m ent.Mixin, annotations ...schema.Annotation) ent.Mixin {
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return edgeAnnotator{Mixin: m, annotations: annotations}
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}
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type fieldAnnotator struct {
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ent.Mixin
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annotations []schema.Annotation
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}
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func (a fieldAnnotator) Fields() []ent.Field {
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fields := a.Mixin.Fields()
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for i := range fields {
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desc := fields[i].Descriptor()
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desc.Annotations = append(desc.Annotations, a.annotations...)
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}
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return fields
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}
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type edgeAnnotator struct {
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ent.Mixin
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annotations []schema.Annotation
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}
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func (a edgeAnnotator) Edges() []ent.Edge {
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edges := a.Mixin.Edges()
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for i := range edges {
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desc := edges[i].Descriptor()
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desc.Annotations = append(desc.Annotations, a.annotations...)
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}
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return edges
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}
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