完善套餐与账单接口 & 完善支付数据保存，记录实付价格并关联优惠券

scripts/sql/init.sql

@@ -747,7 +747,7 @@ create table product_sku (
     id          int generated by default as identity primary key,
     product_id  int     not null,
     discount_id int,
-    code        text    not null,
+    code        text    not null unique,
     name        text    not null,
     price       decimal not null,
     created_at  timestamptz default current_timestamp,
@@ -756,7 +756,7 @@ create table product_sku (
 );
 create index idx_product_sku_product_id on product_sku (product_id) where deleted_at is null;
 create index idx_product_sku_discount_id on product_sku (discount_id) where deleted_at is null;
-create index idx_product_sku_code on product_sku (code) where deleted_at is null;
+create unique index idx_product_sku_code on product_sku (code) where deleted_at is null;
 
 -- product_sku表字段注释
 comment on table product_sku is '产品SKU表';
@@ -977,10 +977,12 @@ create table bill (
     trade_id    int,
     resource_id int,
     refund_id   int,
+    coupon_id   int,
     bill_no     text           not null,
     info        text,
     type        int            not null,
     amount      decimal(12, 2) not null default 0,
+    actual      decimal(12, 2) not null default 0,
     created_at  timestamptz default current_timestamp,
     updated_at  timestamptz default current_timestamp,
     deleted_at  timestamptz
@@ -990,6 +992,7 @@ create index idx_bill_user_id on bill (user_id) where deleted_at is null;
 create index idx_bill_trade_id on bill (trade_id) where deleted_at is null;
 create index idx_bill_resource_id on bill (resource_id) where deleted_at is null;
 create index idx_bill_refund_id on bill (refund_id) where deleted_at is null;
+create index idx_bill_coupon_id on bill (coupon_id) where deleted_at is null;
 create index idx_bill_created_at on bill (created_at) where deleted_at is null;
 
 -- bill表字段注释
@@ -1002,7 +1005,8 @@ comment on column bill.refund_id is '退款ID';
 comment on column bill.bill_no is '易读账单号';
 comment on column bill.info is '产品可读信息';
 comment on column bill.type is '账单类型：1-消费，2-退款，3-充值';
-comment on column bill.amount is '账单金额';
+comment on column bill.amount is '应付金额';
+comment on column bill.actual is '实付金额';
 comment on column bill.created_at is '创建时间';
 comment on column bill.updated_at is '更新时间';
 comment on column bill.deleted_at is '删除时间';
@@ -1107,14 +1111,20 @@ alter table channel
 -- resource表外键
 alter table resource
     add constraint fk_resource_user_id foreign key (user_id) references "user" (id) on delete cascade;
+alter table resource
+    add constraint fk_product_code foreign key (code) references product (code) on update cascade on delete restrict;
 
 -- resource_short表外键
 alter table resource_short
     add constraint fk_resource_short_resource_id foreign key (resource_id) references resource (id) on delete cascade;
+alter table resource_short
+    add constraint fk_resource_short_code foreign key (code) references product_sku (code) on update cascade on delete restrict;
 
 -- resource_long表外键
 alter table resource_long
     add constraint fk_resource_long_resource_id foreign key (resource_id) references resource (id) on delete cascade;
+alter table resource_long
+    add constraint fk_resource_long_code foreign key (code) references product_sku (code) on update cascade on delete restrict;
 
 -- trade表外键
 alter table trade
@@ -1135,6 +1145,8 @@ alter table bill
     add constraint fk_bill_resource_id foreign key (resource_id) references resource (id) on delete set null;
 alter table bill
     add constraint fk_bill_refund_id foreign key (refund_id) references refund (id) on delete set null;
+alter table bill
+    add constraint fk_bill_coupon_id foreign key (coupon_id) references coupon (id) on delete set null;
 
 -- coupon表外键
 alter table coupon