feat: add variants attributes and values tables, remove price from products

prisma/migrations/20250820183901_add_tables_variants_products/migration.sql

@@ -0,0 +1,43 @@
+/*
+  Warnings:
+
+  - You are about to drop the column `price` on the `products` table. All the data in the column will be lost.
+
+*/
+-- AlterTable
+ALTER TABLE "products" DROP COLUMN "price";
+
+-- CreateTable
+CREATE TABLE "variants_attributes" (
+    "id" SERIAL NOT NULL,
+    "name" TEXT NOT NULL,
+    "created_at" TIMESTAMP(0) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updated_at" TIMESTAMP(0) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    CONSTRAINT "variants_attributes_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "variants_attributes_values" (
+    "id" SERIAL NOT NULL,
+    "attribute_id" INTEGER NOT NULL,
+    "product_id" INTEGER NOT NULL,
+    "value" TEXT NOT NULL,
+    "price" DECIMAL(10,2) NOT NULL,
+    "created_at" TIMESTAMP(0) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updated_at" TIMESTAMP(0) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    CONSTRAINT "variants_attributes_values_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE UNIQUE INDEX "variants_attributes_name_key" ON "variants_attributes"("name");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "variants_attributes_values_attribute_id_product_id_value_key" ON "variants_attributes_values"("attribute_id", "product_id", "value");
+
+-- AddForeignKey
+ALTER TABLE "variants_attributes_values" ADD CONSTRAINT "variants_attributes_values_attribute_id_fkey" FOREIGN KEY ("attribute_id") REFERENCES "variants_attributes"("id") ON DELETE RESTRICT ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "variants_attributes_values" ADD CONSTRAINT "variants_attributes_values_product_id_fkey" FOREIGN KEY ("product_id") REFERENCES "products"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

prisma/schema.prisma

@@ -55,21 +55,48 @@ model Product {
   title       String
   imgSrc      String   @map("img_src")
   alt         String?
-  price       Decimal  @db.Decimal(10, 2)
   description String?
   categoryId  Int?     @map("category_id")
   isOnSale    Boolean  @default(false) @map("is_on_sale")
   features    String[]
   createdAt   DateTime @default(now()) @map("created_at") @db.Timestamp(0)
   updatedAt   DateTime @default(now()) @map("updated_at") @db.Timestamp(0)
 
-  category   Category?   @relation(fields: [categoryId], references: [id], onDelete: SetNull)
-  cartItems  CartItem[]
-  orderItems OrderItem[]
+  category               Category?                @relation(fields: [categoryId], references: [id], onDelete: SetNull)
+  cartItems              CartItem[]
+  orderItems             OrderItem[]
+  variantAttributeValues VariantAttributeValue[]
 
   @@map("products")
 }
 
+model VariantAttribute {
+  id        Int      @id @default(autoincrement())
+  name      String   @unique
+  createdAt DateTime @default(now()) @map("created_at") @db.Timestamp(0)
+  updatedAt DateTime @default(now()) @map("updated_at") @db.Timestamp(0)
+
+  variantsAttributeValue VariantAttributeValue[]
+
+  @@map("variants_attributes")
+}
+
+model VariantAttributeValue {
+  id          Int      @id @default(autoincrement())
+  attributeId Int      @map("attribute_id")
+  productId   Int      @map("product_id")
+  value       String
+  price       Decimal  @db.Decimal(10, 2)
+  createdAt   DateTime @default(now()) @map("created_at") @db.Timestamp(0)
+  updatedAt   DateTime @default(now()) @map("updated_at") @db.Timestamp(0)
+
+  variantAttribute VariantAttribute @relation(fields: [attributeId], references: [id])
+  product          Product           @relation(fields: [productId], references: [id])
+
+  @@unique([attributeId, productId, value], name: "unique_attribute_product_value")
+  @@map("variants_attributes_values")
+}
+
 model Cart {
   id            Int      @id @default(autoincrement())
   sessionCartId String   @unique @default(dbgenerated("gen_random_uuid()")) @map("session_cart_id") @db.Uuid