Schema: How to map a field to more than one entity

Questions & Feedback
1

Hi
Is there a way to map a field to more than one entity?

E.g. that’s a game post

type GamePost @entity {
  id: ID! 
  game: Game!
}

and that’s a claim post

type ClaimPost @entity {
  id: ID! 
  claim: Claim!
}

but a post is a post, can I don something like that

type Post @entity {
  id: ID! 
  claim: Claim! | Game!
}
2

I’m assuming you mean a field that can have multiple different entity types, and yes, you can use interfaces, although the entity types you want to be able to populate that field will need to implement that interface

interface GenericInterface {
  id: ID!
}

type GamePost implements GenericInterface @entity {
  id: ID! 
  game: Game!
}

type ClaimPost implements GenericInterface @entity {
  id: ID! 
  claim: Claim!
}

type Post @entity {
  id: ID! 
  claim: GenericInterface!
}

Although from the entity type names it would almost seem as if you want to have a common interface between GamePost and ClaimPost that would be called Post

3

Hi,
Thanks for the response, but the idea was to only use one type of Post and have it connect with two different entities
Game’s posts & Claim’s posts.

These entities look something like so

type Game @entity {
id: ID! # contract address
posts: [GamePost!]! @derivedFrom(field: “entity”)
}

type Claim @entity {
id: ID! # contract address
posts: [ClaimPost!]! @derivedFrom(field: “entity”)
}