Error: Schema must contain uniquely named types but contains multiple types named "hasura_parties"

[ccalvarez]

Preliminary Checks

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Description

Trying to customize a Hasura GraphQL Type, following the Schema Customization API guide, throws the error:

Error: Schema must contain uniquely named types but contains multiple types named "hasura_parties".

Reproduction Link

https://github.com/ccalvarez/hasura-type-custom

Steps to Reproduce

1. Clone the reproducible test case repo
2. cd to folder hasura-type-custom
3. Run npm install to install dependencies
4. Run gatsby develop

Expected Result

1. The gatsby site 'hello-world' started

2. Able to query the hasura.parties list, including the new field idToString, via GraphiQL with this GraphQL query:

query MyQuery { hasura { parties { id name idToString } } }

Actual Result

1. The gatsby site doesn't start
2. Gatsby build process throws the error:

Missing onError handler for invocation 'building-schema', error was 'Error: Schema must contain uniquely named types but contains multiple types named "hasura_parties".'.

3. Build process hangs at step ⠇ building schema

Environment

System:
    OS: Windows 10 10.0.19042
    CPU: (8) x64 Intel(R) Core(TM) i7-6700HQ CPU @ 2.60GHz
  Binaries:
    Node: 14.17.1 - C:\Program Files\nodejs\node.EXE
    Yarn: 1.22.5 - C:\Program Files (x86)\Yarn\bin\yarn.CMD
    npm: 6.14.13 - C:\Program Files\nodejs\npm.CMD
  Browsers:
    Edge: Spartan (44.19041.423.0), Chromium (91.0.864.67)
  npmPackages:
    gatsby: ^3.9.1 => 3.9.1 
    gatsby-source-graphql: ^3.9.0 => 3.9.0 
  npmGlobalPackages:
    gatsby-cli: 3.9.0

Config Flags

I don't use any flag.

[LekoArts]

If hasura_parties already exists and you only want to add idToString you shouldn't use the @dontInfer flag and add it like this:

exports.createSchemaCustomization = ({ actions }) => {
  const { createTypes } = actions
  const typeDefs = `
    type hasura_parties implements Node {
      idToString: String
    }
  `
  createTypes(typeDefs)
}

exports.createResolvers = ({ createResolvers }) => {
  createResolvers({
    hasura_parties: {
      idToString: {
        type: "String",
        resolve: source => source.id.toString(),
      },
    },
  })
}

[ccalvarez]

@LekoArts thanks, I have made the change you suggest, I have removed the @dontInfer flag, but I'm still getting the same error:

Error: Schema must contain uniquely named types but contains multiple types named "hasura_parties".

I have updated the reproduction repo here: ccalvarez/hasura-type-custom@c6c591d

I have the same error, either declaring all the attributes of the type:

exports.createSchemaCustomization = ({ actions }) => {
  const { createTypes } = actions
  const typeDefs = `
    type hasura_parties implements Node {
      id: Int!,
      name: String!,
      idToString: String
    }
  `
  createTypes(typeDefs)
}

or declaring just the new attribute I want to add, as you suggested:

exports.createSchemaCustomization = ({ actions }) => {
  const { createTypes } = actions
  const typeDefs = `
    type hasura_parties implements Node {
      idToString: String
    }
  `
  createTypes(typeDefs)
}