3 replies

Flattening Polymorphic Relationships in Ash GraphQL

Hey folks

I’m working with polymorphic relationships in Ash and followed the guide here: https://hexdocs.pm/ash/polymorphic-relationships.html. I tried exposing it through the GraphQL API, and I’m a bit unsure if there’s a way to shape the schema the way I want.

Right now, when I query

bankAccounts

bankAccounts

, I get something like this:

query {
  bankAccounts {
    id
    name
    implementation {
      ... on CheckingAccount {
        overdraftLimit
      }
      ... on SavingsAccount {
        interestRate
      }
    }
  }
}

query {
  bankAccounts {
    id
    name
    implementation {
      ... on CheckingAccount {
        overdraftLimit
      }
      ... on SavingsAccount {
        interestRate
      }
    }
  }
}

So BankAccount gives me the shared fields, and the account-specific fields are nested under implementation.

What I’d like instead is something more “flattened,” where the

bankAccounts

bankAccounts

field itself is the union/interface, so I can query like this:

query {
  bankAccounts {
    id
    name
    ... on CheckingAccount {
      overdraftLimit
    }
    ... on SavingsAccount {
      interestRate
    }
  }
}

query {
  bankAccounts {
    id
    name
    ... on CheckingAccount {
      overdraftLimit
    }
    ... on SavingsAccount {
      interestRate
    }
  }
}

That way, the shared fields (

id

id

name

name

) and the resource-specific fields (

overdraftLimit

overdraftLimit

interestRate

interestRate

) all come back directly, without the extra implementation wrapper.

In my mind, this seems like it could involve creating a custom type and resolver, but I wasn’t sure if I should dive down that path or if there’s a simpler/standard way in Ash to achieve this.

Is there a way to configure Ash GraphQL to expose polymorphic relationships like this, or is the nested implementation structure the standard/only approach?

Thanks a lot!

Solution

no that would be graphql interfaces IIRC and we don't really have anything for this at the moment

Jump to solution

Ash Framework•6mo ago•

3 replies

Geril

Flattening Polymorphic Relationships in Ash GraphQL

Hey folks

bankAccounts

bankAccounts

, I get something like this:

query {
  bankAccounts {
    id
    name
    implementation {
      ... on CheckingAccount {
        overdraftLimit
      }
      ... on SavingsAccount {
        interestRate
      }
    }
  }
}

query {
  bankAccounts {
    id
    name
    implementation {
      ... on CheckingAccount {
        overdraftLimit
      }
      ... on SavingsAccount {
        interestRate
      }
    }
  }
}

So BankAccount gives me the shared fields, and the account-specific fields are nested under implementation.

What I’d like instead is something more “flattened,” where the

bankAccounts

bankAccounts

field itself is the union/interface, so I can query like this:

query {
  bankAccounts {
    id
    name
    ... on CheckingAccount {
      overdraftLimit
    }
    ... on SavingsAccount {
      interestRate
    }
  }
}

query {
  bankAccounts {
    id
    name
    ... on CheckingAccount {
      overdraftLimit
    }
    ... on SavingsAccount {
      interestRate
    }
  }
}

That way, the shared fields (

id

id

name

name

) and the resource-specific fields (

overdraftLimit

overdraftLimit

interestRate

interestRate

Solution

no that would be graphql interfaces IIRC and we don't really have anything for this at the moment

Jump to solution

Flattening Polymorphic Relationships in Ash GraphQL

Flattening Polymorphic Relationships in Ash GraphQL

Similar Threads

Similar Threads

Similar Threads