Enum cannot represent value, when querying for defaultValue

I’m using ariadne and suddenly started encountering an error from the introspection query issued by GraphQL Playground when I upgraded from ariadne 0.12.0 to 0.13.0.

I’ve boiled the problem down as simply as possible and actually it seems to have nothing to do with ariadne, but instead is a change in behaviour from graphql-core 3.0 -> 3.1.

The following works in graphql-core 3.0, but not in 3.1:

import graphql
import pprint

schema = graphql.build_schema("""
    enum Role {
        ADMIN
        USER
    }

    type Query {
        hello(r: Role = USER): String
    }
""")

query = "{__schema{types{name,fields{name,args{name,defaultValue}}}}}"

result = graphql.graphql_sync(schema, query)

pprint.pprint(result)

In graphql-core 3.1, it throws the error: Enum 'Role' cannot represent value: 'USER'

Could someone tell me if I’m doing something wrong? Have I been making an incorrect assumption which errorneously passed in 3.0 and has now been “fixed”? Or is this a regression?

[dkbarn]

@bnaoki do you still get the error message if you completely remove ariadne from the equation? I took my code snippet above and changed the default value to be non-nullable, and the error goes away with graphql-core 3.1.4.

I think the problem might be in ariadne now. Even after upgrading to graphql-core 3.1.4, I still get the error you’re seeing when I have an enum as a default argument value in my SDL. But I think this is because ariadne does not properly support this case yet. See: https://github.com/mirumee/ariadne/issues/293

For the time being I’ve had to remove these default values from my schema to make ariadne 0.13.0 happy.

[bnaoki]

Ahh, you’re right. It does seem to be an issue with ariadne. Thanks for this info!