✨ Create ContestTaskPair table (#2627)

Author: KATO-Hiro

prisma/ERD.md

@@ -126,6 +126,16 @@ OTHERS OTHERS
     }
   
 
+  "contesttaskpair" {
+    String id "🗝️"
+    String contestId 
+    String taskTableIndex 
+    String taskId 
+    DateTime createdAt 
+    DateTime updatedAt 
+    }
+  
+
   "tag" {
     String id "🗝️"
     Boolean is_published 
@@ -195,28 +205,27 @@ OTHERS OTHERS
     }
   
     "user" o|--|| "Roles" : "enum:role"
-    "user" o{--}o "session" : "auth_session"
-    "user" o{--}o "key" : "key"
-    "user" o{--}o "taskanswer" : "taskAnswer"
-    "user" o{--}o "workbook" : "workBooks"
+    "user" o{--}o "session" : ""
+    "user" o{--}o "key" : ""
+    "user" o{--}o "taskanswer" : ""
+    "user" o{--}o "workbook" : ""
     "session" o|--|| "user" : "user"
     "key" o|--|| "user" : "user"
     "task" o|--|| "ContestType" : "enum:contest_type"
     "task" o|--|| "TaskGrade" : "enum:grade"
     "task" o|--|| "AtcoderProblemsDifficulty" : "enum:atcoder_problems_difficulty"
-    "task" o{--}o "tasktag" : "tags"
-    "task" o{--}o "taskanswer" : "task_answers"
-    "task" o{--}o "workbooktask" : "workBookTasks"
-    "tag" o{--}o "tasktag" : "tasks"
+    "task" o{--}o "tasktag" : ""
+    "task" o{--}o "taskanswer" : ""
+    "task" o{--}o "workbooktask" : ""
+    "tag" o{--}o "tasktag" : ""
     "tasktag" o|--|o "task" : "task"
     "tasktag" o|--|o "tag" : "tag"
     "taskanswer" o|--|o "task" : "task"
     "taskanswer" o|--|o "user" : "user"
     "taskanswer" o|--|o "submissionstatus" : "status"
-    "submissionstatus" o{--}o "taskanswer" : "task_answer"
     "workbook" o|--|| "WorkBookType" : "enum:workBookType"
     "workbook" o|--|| "user" : "user"
-    "workbook" o{--}o "workbooktask" : "workBookTasks"
+    "workbook" o{--}o "workbooktask" : ""
     "workbooktask" o|--|| "workbook" : "workBook"
     "workbooktask" o|--|| "task" : "task"
 ```

prisma/migrations/20250928072152_create_contest_task_pair/migration.sql

@@ -0,0 +1,17 @@
+-- CreateTable
+CREATE TABLE "public"."contesttaskpair" (
+    "id" TEXT NOT NULL,
+    "contestId" TEXT NOT NULL,
+    "taskTableIndex" TEXT NOT NULL,
+    "taskId" TEXT NOT NULL,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "contesttaskpair_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE INDEX "contesttaskpair_contestId_idx" ON "public"."contesttaskpair"("contestId");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "contesttaskpair_contestId_taskId_key" ON "public"."contesttaskpair"("contestId", "taskId");

prisma/schema.prisma

@@ -5,9 +5,8 @@
 // https://www.prisma.io/docs/concepts/components/prisma-schema/generators
 // https://www.prisma.io/docs/orm/prisma-client/deployment/edge/deploy-to-vercel
 generator client {
-  provider        = "prisma-client-js"
-  binaryTargets   = ["native", "rhel-openssl-3.0.x"]
-  previewFeatures = ["driverAdapters"]
+  provider      = "prisma-client-js"
+  binaryTargets = ["native", "rhel-openssl-3.0.x"]
 }
 
 // See:
@@ -109,6 +108,20 @@ model Task {
   @@map("task")
 }
 
+// Handling cases where the same problem is used in different contests.
+model ContestTaskPair {
+  id             String   @id @default(uuid())
+  contestId      String
+  taskTableIndex String
+  taskId         String
+  createdAt      DateTime @default(now())
+  updatedAt      DateTime @updatedAt
+
+  @@unique([contestId, taskId]) // Prevent duplicate pairs of (contestId, taskId)
+  @@index([contestId]) // Add index on contestId to speed up queries filtering by contestId
+  @@map("contesttaskpair")
+}
+
 model Tag {
   id           String   @id @unique
   is_published Boolean  @default(false)