Error when var is used in fragment only

[Yagger]

Error happens, when var is used in a fragment, but not on the top level

Steps to reproduce:

1. initialize with Anilist public graph API elm-gql init https://graphql.anilist.co
2. create the following query

query ($search: String!) {
  Page {
    ...foo
  }
}

fragment foo on Page {
  characters(search: $search) {
    name {
      full
    }
  }
}

3. run elm-gql run ./api/Api/schema.json
4. observe the following error in the log

--ELM GQL------------------------------------------------------src/myQuery.gql--

I found the following variables:

    $search

But I ran into an issue:

    $search is unused.

Here's what I think the variables should be:

• note that same query works in GraphQL explorer https://studio.apollographql.com/sandbox/explorer?endpoint=https%3A%2F%2Fgraphql.anilist.co

[georgesboris]

I've had the same issue but the error thrown was a bit misleading. May be worth looking into as well.

I had a query like this:

query ($topVar: String!, $fieldVar: String!) {
  topLevel(topVar: $topVar) {
    ...Record
  }
}

fragment Record on Record {
  fragmentQuery(fragmentVar: $fragmentVar) {
    fieldWithVar(fieldVar: $fieldVar) {
      result
    }
    subRecord {
      ...SubRecord
    }
  }
}

fragment SubRecord on SubRecord {
  fieldA
  fieldB
}

The error thrown was "can't find fragment on type SubRecord".
If I re-run elm-gql the error was ignored but the file was unchanged.
Sometimes it complained about other (valid) fragments but most times it complained about the type nested alongside the fragment that used a variable.

To find the actual error, I inlined the SubRecord fragment into Record - then I got the unused variable error.

query ($topVar: String!, $fieldVar: String!) {
  topLevel(topVar: $topVar) {
    ...Record
  }
}

fragment Record on Record {
  fragmentQuery(fragmentVar: $fragmentVar) {
    fieldWithVar(fieldVar: $fieldVar) {
      result
    }
    subRecord {
      fieldA
      fieldB
    }
  }
}

Finally, I inlined Record so the variable is used in the same scope and re-inserted SubRecord as a fragment and everything worked.

query ($topVar: String!, $fieldVar: String!) {
  topLevel(topVar: $topVar) {
    fieldWithVar(fieldVar: $fieldVar) {
      result
    }
    subRecord {
      ...SubRecord
    }
  }
}

fragment SubRecord on SubRecord {
  fieldA
  fieldB
}