prisma: added grade relation to test

prisma/schema.prisma

@@ -1,38 +1,40 @@
-datasource db {
-    provider     = "mysql"
-    url          = env("DATABASE_URL")
-    relationMode = "prisma"
+generator client {
+  provider = "prisma-client-js"
 }
 
-generator client {
-    provider = "prisma-client-js"
+datasource db {
+  provider     = "mysql"
+  url          = env("DATABASE_URL")
+  relationMode = "prisma"
 }
 
 model Users {
-    id        Int       @id @default(autoincrement())
-    key       String    @unique
-    grades    Grade[]
-    firstName String
-    lastName  String
-    testOn    DateTime? @db.Date
-    isTeacher Boolean   @default(false)
-    test      Test?
-    createdAt DateTime  @default(now())
+  id        Int      @id @default(autoincrement())
+  key       String   @unique
+  firstName String
+  lastName  String
+  isTeacher Boolean  @default(false)
+  createdAt DateTime @default(now())
+  grades    Grade[]
+  test      Test?
 }
 
 model Test {
-    id        Int      @id @default(autoincrement())
-    testOf    Users    @relation(fields: [testOfId], references: [id])
-    testOfId  Int      @unique
-    testOn    DateTime @default(now())
-    createdAt DateTime @default(now())
+  id        Int      @id @default(autoincrement())
+  testOfId  Int      @unique
+  testOn    DateTime @db.Date
+  createdAt DateTime @default(now())
+  testOf    Users    @relation(fields: [testOfId], references: [id])
+  grades    Grade[]
 }
 
 model Grade {
-    id        Int      @id @default(autoincrement())
-    user      Users    @relation(fields: [userId], references: [id])
-    userId    Int
-    grade     Float
-    note      String?
-    createdAt DateTime @default(now())
+  id        Int      @id @default(autoincrement())
+  userId    Int
+  note      String?
+  createdAt DateTime @default(now())
+  grade     Float
+  testId    Int
+  test      Test     @relation(fields: [testId], references: [id])
+  user      Users    @relation(fields: [userId], references: [id])
 }