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