v4.0.9版本更新-门店分类支持多选

server/dukang-api/prisma/migrate-store-category-link.sql

@@ -0,0 +1,21 @@
+-- 门店多分类关联表（v4.0.9+）
+-- 执行：mysql ... < migrate-store-category-link.sql
+
+CREATE TABLE IF NOT EXISTS store_category_link (
+  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
+  store_id BIGINT UNSIGNED NOT NULL,
+  category_id BIGINT UNSIGNED NOT NULL,
+  priority INT NOT NULL DEFAULT 0,
+  created_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
+  PRIMARY KEY (id),
+  UNIQUE KEY uk_store_category_link (store_id, category_id),
+  KEY idx_store_category_link_category (category_id),
+  CONSTRAINT fk_store_category_link_store FOREIGN KEY (store_id) REFERENCES store_store(id) ON DELETE CASCADE,
+  CONSTRAINT fk_store_category_link_category FOREIGN KEY (category_id) REFERENCES common_store_category(id) ON DELETE CASCADE
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+-- 从现有主分类回填
+INSERT IGNORE INTO store_category_link (store_id, category_id, priority)
+SELECT id, category_id, 0
+FROM store_store
+WHERE category_id IS NOT NULL;

server/dukang-api/prisma/schema.prisma

@@ -1000,12 +1000,29 @@ model CommonStoreCategory {
   parent   CommonStoreCategory?  @relation("StoreCategoryTree", fields: [parentId], references: [id], onDelete: Restrict)
   children CommonStoreCategory[] @relation("StoreCategoryTree")
   stores   Store[]
+  storeLinks StoreCategoryLink[]
 
   @@index([parentId, sort])
   @@index([status])
   @@map("common_store_category")
 }
 
+/// 门店 ↔ 二级分类多对多；store.category_id 保留主分类（排序第一）
+model StoreCategoryLink {
+  id         BigInt   @id @default(autoincrement()) @db.UnsignedBigInt
+  storeId    BigInt   @map("store_id") @db.UnsignedBigInt
+  categoryId BigInt   @map("category_id") @db.UnsignedBigInt
+  priority   Int      @default(0)
+  createdAt  DateTime @default(now()) @map("created_at") @db.DateTime(3)
+
+  store    Store               @relation(fields: [storeId], references: [id], onDelete: Cascade)
+  category CommonStoreCategory @relation(fields: [categoryId], references: [id], onDelete: Cascade)
+
+  @@unique([storeId, categoryId])
+  @@index([categoryId])
+  @@map("store_category_link")
+}
+
 model CommonPromoCode {
   id               BigInt          @id @default(autoincrement()) @db.UnsignedBigInt
   code             String          @unique @db.VarChar(32)
@@ -1542,6 +1559,7 @@ model Store {
   packages             StorePackage[]
   packageChangeRequests StorePackageChangeRequest[]
   infoChangeRequests    StoreInfoChangeRequest[]
+  categoryLinks        StoreCategoryLink[]
 
   @@index([cityId, status])
   @@index([partnerAccountId])