Strange Behavior with Union

[deweyjose]

Hi,

I'm seeing a strange issue where all data in my Union types is removed from the response when I used a shield. Even if the query isn't part of any rule.

Have you seen anything like this?

[maticzav]

Hi,

Please add a reproduction or a bit more than just "strange issue". I haven't seen anything like it so far. From the top of my head, however, I think this might stem from you not "allowing" the union type or one of the types it consists of.

I can probably help you better if you post permissions object.

[deweyjose]

Apologies on the vagueness ...

gql
schema {
query: RootQueryType
}

type BookType {
author: String!
}

type MovieType {
director: String!
}

type RootQueryType {
unionTest: SearchableType!
}

union SearchableType = MovieType | BookType
``

shield( { BookType: allow, MovieType: allow, SearchableType: allow } );

[maticzav]

Could you merge the two comments and format the response? I need more information about what you've tried and what you think might be the problem. GraphQLShield doesn't manipulate the response, though. If it were a permissions issue, you wouldn't get any response in unionTest sine it's a non-nullable field.

Have you tried setting the debug option to true in shield and checking for any errors?

[deweyjose]

The unionTest query is hard coded to return { director: 'John' }

This is what I'm seeing:

query test {
unionTest {
__typename
... on MovieType {
director
}
... on BookType {
author
}
}
}

{
"data": {
"unionTest": {
"__typename": "MovieType"
}
}
}

[deweyjose]

@maticzav we figured it out on our end.

The following code snippet will produce expected results now. I changed the return value in resolveType to a string of the class name rather than the value MovieType or BookType. One thing to note though, either return values for resolveType work if I do not applyMiddleware() the schema.

`
const MovieType = new GraphQLObjectType({
name: 'MovieType',
fields: {
director: { type: new GraphQLNonNull(GraphQLString) }
}
});

const BookType = new GraphQLObjectType({
name: 'BookType',
fields: {
author: { type: new GraphQLNonNull(GraphQLString) }
}
});

const DATA = [{ director: 'catherine hardwicke' }, { author: 'catherine cookson' }];

const SearchableType = new GraphQLUnionType({
name: 'SearchableType',
types: [MovieType, BookType],
resolveType(data) {
if (data.director) {
return 'MovieType';
}
if (data.author) {
return 'BookType';
}
return null;
}
});
`