[backend] Remove tags

backend/prisma/migrations/20241211122626_remove_tags/migration.sql

@@ -0,0 +1,21 @@
+/*
+  Warnings:
+
+  - You are about to drop the `ProblemTag` table. If the table is not empty, all the data it contains will be lost.
+  - You are about to drop the `Tag` table. If the table is not empty, all the data it contains will be lost.
+
+*/
+-- DropForeignKey
+ALTER TABLE "ProblemStatement" DROP CONSTRAINT "ProblemStatement_tagId_fkey";
+
+-- DropForeignKey
+ALTER TABLE "ProblemTag" DROP CONSTRAINT "ProblemTag_problemId_fkey";
+
+-- DropForeignKey
+ALTER TABLE "ProblemTag" DROP CONSTRAINT "ProblemTag_tagId_fkey";
+
+-- DropTable
+DROP TABLE "ProblemTag";
+
+-- DropTable
+DROP TABLE "Tag";

backend/prisma/schema.prisma

@@ -66,9 +66,7 @@ model ProblemStatement {
     submissions Submission[]
     testCase    Testcase[]
     editorials  Editorial[]
-    Tag         Tag?         @relation(fields: [tagId], references: [id])
     tagId       String?
-    ProblemTag  ProblemTag[]
 }
 
 model Testcase {
@@ -92,19 +90,3 @@ model Editorial {
     createdAt          DateTime         @default(now())
     updatedAt          DateTime         @updatedAt
 }
-
-model Tag {
-    id         String             @id @default(cuid())
-    name       String
-    problems   ProblemStatement[]
-    ProblemTag ProblemTag[]
-}
-
-model ProblemTag {
-    id        String           @id @default(cuid())
-    problem   ProblemStatement @relation(fields: [problemId], references: [id], onDelete: Cascade)
-    problemId String
-    tag       Tag              @relation(fields: [tagId], references: [id], onDelete: Cascade)
-    tagId     String
-    createdAt DateTime         @default(now())
-}