67 lines
1.5 KiB
Go
67 lines
1.5 KiB
Go
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/dialect"
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"entgo.io/ent/dialect/entsql"
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"entgo.io/ent/schema"
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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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// PromoCodeUsage holds the schema definition for the PromoCodeUsage entity.
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//
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// 优惠码使用记录：记录每个用户使用优惠码的情况
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type PromoCodeUsage struct {
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ent.Schema
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}
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func (PromoCodeUsage) Annotations() []schema.Annotation {
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return []schema.Annotation{
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entsql.Annotation{Table: "promo_code_usages"},
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}
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}
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func (PromoCodeUsage) Fields() []ent.Field {
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return []ent.Field{
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field.Int64("promo_code_id").
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Comment("优惠码ID"),
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field.Int64("user_id").
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Comment("使用用户ID"),
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field.Float("bonus_amount").
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SchemaType(map[string]string{dialect.Postgres: "decimal(20,8)"}).
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Comment("实际赠送金额"),
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field.Time("used_at").
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Default(time.Now).
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SchemaType(map[string]string{dialect.Postgres: "timestamptz"}).
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Comment("使用时间"),
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}
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}
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func (PromoCodeUsage) Edges() []ent.Edge {
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return []ent.Edge{
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edge.From("promo_code", PromoCode.Type).
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Ref("usage_records").
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Field("promo_code_id").
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Required().
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Unique(),
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edge.From("user", User.Type).
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Ref("promo_code_usages").
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Field("user_id").
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Required().
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Unique(),
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}
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}
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func (PromoCodeUsage) Indexes() []ent.Index {
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return []ent.Index{
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index.Fields("promo_code_id"),
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index.Fields("user_id"),
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// 每个用户每个优惠码只能使用一次
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index.Fields("promo_code_id", "user_id").Unique(),
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}
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}
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