I had an issue: 'Property __typename on Query does not exist'

[SalihCanBinboga]

Describe the issue A clear and concise description of what the problem is.

To Reproduce (MUST BE PROVIDED)

When I run the below code snippet I have the below error:

` final HttpLink httpLink = HttpLink( '$baseUrl/graphql', );

final AuthLink authLink = AuthLink(
  getToken: () async =>
      'Bearer $accessToken',
);

final Link link = authLink.concat(httpLink);

final GraphQLClient client = GraphQLClient(
  cache: GraphQLCache(),
  link: link,
);

const String readCategories = r'''

query GetCarCategories($parentId: Int!){ getCarCategories(parentId: $parentId) { id title } } ''';

final QueryResult<Object?> resulttt = await client.query(
  QueryOptions(
    document: gql(readCategories),
    variables: const <String, dynamic>{
      'parentId': 101,
    },
  ),
);

if (resulttt.hasException) {
  print(resulttt.exception.toString());
  /*
  OperationException(linkException: null, graphqlErrors: [
  GraphQLError(message: Property __typename on Query does not exist, 
  locations: [ErrorLocation(line: 2, column: 3)], path: [], extensions: null)])
   */
}`

Expected behavior I want to expect clear response.

device / execution context I have tried real device on ios. Remote server.

[budde377]

gql is adding the property __typename on every selectionset. It looks like your server doesn't support introspection on the Query type. Either enable introspection or use another implementation of gql. If you do not support the __typename introspection field in general, you can not expect caching to work properly.

[SalihCanBinboga]

@vincenzopalazzo @budde377 But I can add __typename parameter in my own query manager?w

[budde377]

Okay. I'm not sure what to tell you. The error message is from your server, it complains that you're trying to query Query.__typename. So you have two options:

• not fetch __typename
• fix your server

[vincenzopalazzo]

+1 for fix your server