TTC
Theo's Typesafe Cult•3y ago
EQ

One to one and one to many

Hello, I currently have 
model Event {
  active_meeting_id  String?
  active_meeting     Meeting @relation(name: "active_meeting", fields: [active_meeting_id], references: [id])

  old_meetings      Meeting[]     @relation(name: "old_meetings")
}

model Meeting {
  event_id          String?
  event             Event?         @relation(name: "active_meeting")
  old_event         Event?         @relation(name: "old_meetings", fields: [event_id], references: [id])
}
model Event {
  active_meeting_id  String?
  active_meeting     Meeting @relation(name: "active_meeting", fields: [active_meeting_id], references: [id])

  old_meetings      Meeting[]     @relation(name: "old_meetings")
}

model Meeting {
  event_id          String?
  event             Event?         @relation(name: "active_meeting")
  old_event         Event?         @relation(name: "old_meetings", fields: [event_id], references: [id])
}
But when I for example create an active meeting, the event_id stays null. Of course, I don't assign it to the active_meeting but idk how to do. Before this, I just had an event field with Event? type and events with Event[] but a meeting can only have 1 event, not an array and both event and old_event refer to the same event. Does someone know how to do this properly?
1 Reply
EQ
EQOP•3y ago
So basically what I want to achieve is something like (or even cleaner without having to use old_event)
model Event {
  active_meeting    Meeting?      @relation(name: "active_meeting")

  old_meetings      Meeting[]     @relation(name: "old_meetings")
}

model Meeting {
  event_id          String?        @unique
  event             Event?         @relation(name: "active_meeting", fields: [event_id], references: [id])
  old_event         Event?         @relation(name: "old_meetings", fields: [event_id], references: [id])
}
model Event {
  active_meeting    Meeting?      @relation(name: "active_meeting")

  old_meetings      Meeting[]     @relation(name: "old_meetings")
}

model Meeting {
  event_id          String?        @unique
  event             Event?         @relation(name: "active_meeting", fields: [event_id], references: [id])
  old_event         Event?         @relation(name: "old_meetings", fields: [event_id], references: [id])
}
but this gives the following error in the image

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