compileGatsbyFragments: cannot use __typename on field of interface type

[vladar]

Say we have the following custom fragment:

fragment Example on MyInterface {
  __typename
  someField
}

The compileNodeQueries will transform it to something like this for node query:

fragment Example on MyInterface {
  remoteTypeName: __typename
  someField
}

And compileGatsbyFragments will transform it to:

fragment Example on PrefixMyInterface {
  remoteTypeName
  someField
}

The problem though is that the field remoteTypeName is not added to PrefixMyInterface and as a result, Gatsby query fails with an error.