refactor

prisma/migrations/20230207142155_ondelete/migration.sql

@@ -0,0 +1,5 @@
+-- DropForeignKey
+ALTER TABLE "Article" DROP CONSTRAINT "Article_categoryId_fkey";
+
+-- AddForeignKey
+ALTER TABLE "Article" ADD CONSTRAINT "Article_categoryId_fkey" FOREIGN KEY ("categoryId") REFERENCES "Category"("id") ON DELETE CASCADE ON UPDATE CASCADE;

prisma/schema.prisma

@@ -16,7 +16,7 @@ model Article {
   markdown     String
   contentTable Json?
   categoryId   String
-  category     Category @relation(fields: [categoryId], references: [id])
+  category     Category @relation(fields: [categoryId], references: [id], onDelete: Cascade)
   dateCreated  DateTime @default(now())
   dateUpdated  DateTime @default(now())
 }