feat: add import ids

Author: ksambhi

collection/prisma/migrations/20240821145041_add_import_id/migration.sql

@@ -0,0 +1,33 @@
+/*
+  Warnings:
+
+  - Added the required column `importId` to the `OrderItem` table without a default value. This is not possible if the table is not empty.
+
+*/
+-- AlterTable
+
+-- Begin by allowing NULL values
+ALTER TABLE "OrderItem" ADD COLUMN     "importId" UUID;
+
+-- CreateTable
+CREATE TABLE "OrderItemImport" (
+    "id" UUID NOT NULL,
+    "date" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "name" TEXT NOT NULL,
+
+    CONSTRAINT "OrderItemImport_pkey" PRIMARY KEY ("id")
+);
+
+
+
+-- AddForeignKey
+ALTER TABLE "OrderItem" ADD CONSTRAINT "OrderItem_importId_fkey" FOREIGN KEY ("importId") REFERENCES "OrderItemImport"("id") ON DELETE RESTRICT ON UPDATE CASCADE;
+
+-- Create import for everything so far called "Initial Import"
+INSERT INTO "OrderItemImport" ("id", "name") VALUES (gen_random_uuid (), 'Initial Import (academic year 22-23)');
+
+-- Set importId to the initial import
+UPDATE "OrderItem" SET "importId" = (SELECT "id" FROM "OrderItemImport" WHERE "name" = 'Initial Import (academic year 22-23)');
+
+-- Make non-NULL
+ALTER TABLE "OrderItem" ALTER COLUMN "importId" SET NOT NULL;

collection/prisma/schema.prisma

@@ -87,15 +87,28 @@ model Order {
     academicYearReference AcademicYear @relation(fields: [academicYear], references: [year])
 }
 
+// Imports of data, to allow rollback
+model OrderItemImport {
+    id   String   @id @default(cuid()) @db.Uuid
+    date DateTime @default(now())
+    name String
+
+    OrderItem OrderItem[]
+}
+
 // OrderItems are the items that make up an order
 model OrderItem {
     id        Int     @id @default(autoincrement())
     orderId   Int
     quantity  Int
     variantId Int
     collected Boolean
-    Order     Order   @relation(fields: [orderId], references: [id])
-    Variant   Variant @relation(fields: [variantId], references: [id])
+    // tag the import this came from
+    importId  String  @db.Uuid
+
+    Import  OrderItemImport @relation(fields: [importId], references: [id])
+    Order   Order           @relation(fields: [orderId], references: [id])
+    Variant Variant         @relation(fields: [variantId], references: [id])
 }
 
 // RootItems are what we sell, and have Variants