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94
backend/ent/schema/redeem_code.go
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94
backend/ent/schema/redeem_code.go
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package schema
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import (
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"time"
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"github.com/Wei-Shaw/sub2api/internal/service"
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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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// RedeemCode holds the schema definition for the RedeemCode entity.
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//
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// 删除策略:硬删除
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// RedeemCode 使用硬删除而非软删除,原因如下:
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// - 兑换码具有一次性使用特性,删除后无需保留历史记录
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// - 已使用的兑换码通过 status 和 used_at 字段追踪,无需依赖软删除
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// - 减少数据库存储压力和查询复杂度
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//
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// 如需审计已删除的兑换码,建议在删除前将关键信息写入审计日志表。
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type RedeemCode struct {
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ent.Schema
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}
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func (RedeemCode) Annotations() []schema.Annotation {
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return []schema.Annotation{
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entsql.Annotation{Table: "redeem_codes"},
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}
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}
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func (RedeemCode) Fields() []ent.Field {
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return []ent.Field{
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field.String("code").
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MaxLen(32).
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NotEmpty().
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Unique(),
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field.String("type").
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MaxLen(20).
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Default(service.RedeemTypeBalance),
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field.Float("value").
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SchemaType(map[string]string{dialect.Postgres: "decimal(20,8)"}).
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Default(0),
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field.String("status").
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MaxLen(20).
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Default(service.StatusUnused),
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field.Int64("used_by").
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Optional().
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Nillable(),
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field.Time("used_at").
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Optional().
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Nillable().
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SchemaType(map[string]string{dialect.Postgres: "timestamptz"}),
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field.String("notes").
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Optional().
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Nillable().
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SchemaType(map[string]string{dialect.Postgres: "text"}),
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field.Time("created_at").
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Immutable().
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Default(time.Now).
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SchemaType(map[string]string{dialect.Postgres: "timestamptz"}),
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field.Int64("group_id").
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Optional().
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Nillable(),
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field.Int("validity_days").
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Default(30),
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}
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}
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func (RedeemCode) Edges() []ent.Edge {
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return []ent.Edge{
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edge.From("user", User.Type).
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Ref("redeem_codes").
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Field("used_by").
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Unique(),
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edge.From("group", Group.Type).
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Ref("redeem_codes").
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Field("group_id").
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Unique(),
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}
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}
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func (RedeemCode) Indexes() []ent.Index {
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return []ent.Index{
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// code 字段已在 Fields() 中声明 Unique(),无需重复索引
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index.Fields("status"),
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index.Fields("used_by"),
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index.Fields("group_id"),
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}
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}
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