Prisma is reporting a failure in enforcing uniqueness constraints, despite the absence of any unique fields defined in the schema

Question

Prisma is reporting a failure in enforcing uniqueness constraints, despite the absence of any unique fields defined in the schema

I am currently utilizing prisma in my project, which consists of three models:

model User {
  id               String            @id @default(cuid())
  name             String            @unique @db.VarChar(35)
  email            String            @unique @db.VarChar(512)
  password         String            @db.VarChar(1024)
  details          String            @default("") @db.VarChar(512)
  avatar           String            @default("/default-avatar.svg") @db.VarChar(150)
  activity         String            @default("Online") @db.VarChar(25)
  likes            Int               @default(0)
  suggestions      Boolean           @default(false)
  verified         Boolean           @default(false)
  blockedUsers     BlockedUser[]
  comments         Comment[]
  communities      Community[]
  communityMembers CommunityMember[]
  followers        Follower[]
  friends          Friend[]
  messages         Message[]
  posts            Post[]
  openDMs          DM[]
  interests        UserInterest[]

  @@map("user")
}

model Community {
  id          String              @id @default(cuid())
  title       String              @unique @db.VarChar(35)
  details     String              @db.VarChar(512)
  memberID    String?
  membersUser User[]
  members     CommunityMember[]
  interests   CommunityInterest[]
  posts       Post[]

  @@map("community")
}

model CommunityMember {
  id          String    @id @default(cuid())
  nickname    String?
  userID      String
  communityID String
  user        User      @relation(fields: [userID], references: [id])
  community   Community @relation(fields: [communityID], references: [id])
  owner       Boolean

  @@map("community_member")
}

A specific route in my backend is causing an issue. It involves creating a new table for community members using the prisma client and connecting existing users and communities by their IDs. However, this process results in an error message:

Unique constraint failed on the constraint: community_member_communityID_key

Shown below is the code snippet responsible for adding a community member:

await prisma.communityMember.create({
  data: {
    nickname: response.account.name,
    user: {
      connect: { id: response.account.id }
    },
    community: {
      connect: { id: communityID }
    },
    owner: false
  }
});

I have attempted to drop the database and reset prisma migrations, but the problem persists. Upon inspecting the MySQL table, it appears that both the communityID and userID fields are set as unique, leading me to suspect an issue with prisma migrate. Does anyone have insight into what might be causing this issue and how I can create these fields without encountering uniqueness constraints?

mysql typescript prisma

Answer 1

Answer №1

Have you considered using the create method instead of connect in this scenario? The documentation at https://www.prisma.io/docs/concepts/components/prisma-client/relation-queries#nested-writes suggests that nested writes should use the create method:

await prisma.communityMember.create({
    data: {
      nickname: response.account.name,
      user: {
        create: [
            {id: response.account.id}
        ]
      },
      community: {
        create: [
            {id: communityID}
        ]
      },
      owner: false
    }
})

Answer 2

Have you considered using the create method instead of connect in this scenario? The documentation at https://www.prisma.io/docs/concepts/components/prisma-client/relation-queries#nested-writes suggests that nested writes should use the create method:

await prisma.communityMember.create({
    data: {
      nickname: response.account.name,
      user: {
        create: [
            {id: response.account.id}
        ]
      },
      community: {
        create: [
            {id: communityID}
        ]
      },
      owner: false
    }
})

Prisma is reporting a failure in enforcing uniqueness constraints, despite the absence of any unique fields defined in the schema

Answer №1

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