prisma: added grade relation to test

prisma/schema.prisma

@@ -1,38 +1,40 @@
+generator client {
+  provider = "prisma-client-js"
+}
+
 datasource db {
   provider     = "mysql"
   url          = env("DATABASE_URL")
   relationMode = "prisma"
 }
 
-generator client {
-    provider = "prisma-client-js"
-}
-
 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())
+  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())
+  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())
+  grade     Float
+  testId    Int
+  test      Test     @relation(fields: [testId], references: [id])
+  user      Users    @relation(fields: [userId], references: [id])
 }