58 lines
1.3 KiB
Go
58 lines
1.3 KiB
Go
package mixin
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import (
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"context"
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"time"
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"entgo.io/ent"
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"entgo.io/ent/schema/field"
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"entgo.io/ent/schema/mixin"
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)
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// TimeFormat ISO 8601 时间格式
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const TimeFormat = time.RFC3339
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// NowString 返回当前时间的 ISO 8601 格式字符串
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func NowString() string {
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return time.Now().Format(TimeFormat)
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}
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// TimeMixin 时间字段混入
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// created_at: 创建时间
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// updated_at: 更新时间（自动更新）
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type TimeMixin struct {
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mixin.Schema
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}
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// Fields of the TimeMixin.
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func (TimeMixin) Fields() []ent.Field {
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return []ent.Field{
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field.String("created_at").
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DefaultFunc(NowString).
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Immutable().
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StructTag(`json:"created_at"`).
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Comment("creation time"),
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field.String("updated_at").
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DefaultFunc(NowString).
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StructTag(`json:"updated_at"`).
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Comment("update time"),
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}
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}
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// Hooks of the TimeMixin.
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func (TimeMixin) Hooks() []ent.Hook {
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return []ent.Hook{
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func(next ent.Mutator) ent.Mutator {
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return ent.MutateFunc(func(ctx context.Context, m ent.Mutation) (ent.Value, error) {
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// 只在更新操作时设置 updated_at
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if m.Op().Is(ent.OpUpdate | ent.OpUpdateOne) {
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if setter, ok := m.(interface{ SetUpdatedAt(string) }); ok {
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setter.SetUpdatedAt(NowString())
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}
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}
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return next.Mutate(ctx, m)
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})
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},
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}
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}
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