Type extensions not working

[danielmcmillan]

If you have a schema definition that includes type extensions, e.g.

type Query {
  something
}
extend type Query {
  somethingElse
}

makeAugmentedSchema will fail with an error "Cannot extend type "Query" because it does not exist in the existing schema." (looks like extractTypeMapFromTypeDefs replaces the initial type definition since the second one has the same name).

makeExecutableSchema of graphql-tools will build a schema that includes the type extensions.
augmentSchema will ignore those type extensions and the resulting schema will only include the base type. (looks like extractTypeMapFromSchema takes astNode but ignores the extensionASTNodes array of GraphQLObjectType).

[JackDapid]

yes, same experience here

[johnymontana]

A possible workaround from @benjamin-rood

Benjamin Rood  9 hours ago
FYI if anyone encounters this, I got around it by using the @graphql-toolkit/schema-merging module, it will merge type extensions together, then you use print from graphql.js to export the typedefs back into an SDL string. (edited) 

Benjamin Rood  9 hours ago
Which then you can then pass into makeAugmentedSchema :slightly_smiling_face:

[benjamin-rood]

@johnymontana

Workaround:

Use mergeTypeDefs function from the @graphql-toolkit/schema-merging module, it will merge type extensions together, then you use print from graphql.js to export the typedefs back into an SDL string.

Which you can then pass back into makeAugmentedSchema.

pseudocode:

import { mergeTypeDefs } from '@graphql-toolkit/schema-merging';
import { print } from 'graphql';

const a = `type Query {
  rootQuery: String @cypher(statement: "WITH 'Wooorking 🐈 🐈 🐈 🐈' AS value RETURN value")
 }`;
const b = ` type Movie {
  title: String
  movieTestBase: String @cypher(statement: "WITH 'Wooorking 🐈 🐈 🐈 🐈' AS value RETURN value")
 }`;
const c = `extend type Movie {
  movieTestExtend: String @cypher(statement: "WITH 'Wooorking 🐈 🐈 🐈 🐈' AS value RETURN value")
 }`;
const d = `extend type Query {
  extendQuery: String @cypher(statement: "WITH 'NOT WORKING 😞 😞 😞 😞' AS value RETURN value")
 }
`;
const tdList = [a, b, c, d];
return print(mergeTypeDefs(tdlist));

[johnymontana]

This should be fixed now (by #418) Please reopen if you're still having problems with this.