graphql-code-generator: Got a duplicate identifier issue

@ardatan Thank you so much for the response! I’ll remove the client preset and see if that fixes it

Edit: It did! You’re amazing, thank you again!

For anyone who runs into this in the future, in codegen.ts I changed

generates: {
    'app/javascript/generated/graphql': {
      preset: 'client',
      plugins: ['typescript', 'typescript-operations', 'typescript-react-apollo'],
    },
  }

to

generates: {
  "app/javascript/generated/graphql.tsx": {
    plugins: ['typescript', 'typescript-operations', 'typescript-react-apollo'],
  },
}

@RomanBaiocco You get duplicate error because client preset is defined with plugins. You get validation error because you don’t have tsx extension as output in TS Config.

@llanginger, you need to not have the following in your plugins array: typescript, typescript-operations and typescript-react-apollo. So you config should look like

const config = {
overwrite: true,
  schema: [
    {
      'myurl': {
        headers: {
          Authorization: "Bearer " + TOKEN,
          ["x-correlation-id"]: uuidv4()
        }
      }
    }
  ],
  documents: ['src/graphql/testQuery/*.{ts,tsx}'],
  generates: {
    './src/__generated__/': {
      preset: 'client',
      plugins: [
      // don't need to add plugins when using the client preset
       ],
      config: {
        withHooks: true,
        withComponent: false,
        futureProofEnums: true
      },
      presetConfig: {
        gqlTagName: 'gql',
        fragmentMasking: false,
      },
    },
  },
  ignoreNoDocuments: true,
}
export default config

This issue won’t be reproducible with newer version of codegen that raises an error when plugins are listed along with preset: "client"

Still happening

I get the same issue coming from the typescript plugin

I was getting this error also and resolved it after trying futureProofEnums (thank you @luizakp!). In-case it is useful, our config looks a bit like this;

const config: CodegenConfig = {
  overwrite: true,
  schema: [
    {
      'https://graphql.datocms.com/': {
        headers: {
          // ... 
        },
      },
    },
  ],
  generates: {
    'src/generated/graphql.ts': {
      plugins: ['typescript'],
      config: {
        enumsAsTypes: true,
        futureProofEnums: true,
      },
    },
    './graphql.schema.json': {
      plugins: ['introspection'],
    },
  },
}

@llanginger, I misread your original post. Uhm, I think the preset will write to a directory, while the typescript-react-apollo wants to write to a file. So if you remove the preset, you have to change generates key to a file name instead of a directory, i.e. ./src/__generated__/ needs to become something like ./src/__generated__/generated-hooks.ts

This approach does not allow to keep the preset features, because typescript-react-apollo writes the code dependent from the graphql.ts generated by the ‘client’ preset.

I want to keep the functionality of the preset (with fragment masking, gpl and index files) and I need an apollo plugin. So, is it possible?

I got the same issues with the following config:

ignoreNoDocuments: true, hooks: { afterAllFileWrite: ['prettier --write'] }, documents: ['src/graphql/data/**/*.ts'], schema: { [API_URL]: { headers: { 'key': API_KEY } } }, generates: { './src/graphql/codegen/': { preset: 'client', plugins: [], config: { useTypeImports: true, documentMode: 'string', namingConvention: 'keep' }, presetConfig: { fragmentMasking: { unmaskFunctionName: 'unmaskFragment' } }, documentTransforms: [addTypenameSelectionDocumentTransform] } }

The output is:

export type Explainers = { .... } export type Explainers = Explainers & { .... }

I solved it by adding namingConvention: ‘keep’ in the config and the second type is now:

export type explainers = Explainers & { ... }

@ardatan Thank you so much for the response! I’ll remove the client preset and see if that fixes it

Edit: It did! You’re amazing, thank you again!

For anyone who runs into this in the future, in codegen.ts I changed

generates: {
    'app/javascript/generated/graphql': {
      preset: 'client',
      plugins: ['typescript', 'typescript-operations', 'typescript-react-apollo'],
    },
  }

to

generates: {
  "app/javascript/generated/graphql.tsx": {
    plugins: ['typescript', 'typescript-operations', 'typescript-react-apollo'],
  },
}

But how u guys using without the preset: 'client',, her if i run without it in gives an error: Command failed with exit code 1.

Using futureProofEnums worked for me

I encountered the same issue here, with plugins typescript, typescript-operations and typescript-urql

@llanginger, I misread your original post. Uhm, I think the preset will write to a directory, while the typescript-react-apollo wants to write to a file. So if you remove the preset, you have to change generates key to a file name instead of a directory, i.e. ./src/__generated__/ needs to become something like ./src/__generated__/generated-hooks.ts

@RomanBaiocco You get duplicate error because client preset is defined with plugins. You get validation error because you don’t have tsx extension as output in TS Config.

This issue won’t be reproducible with newer version of codegen that raises an error when plugins are listed along with preset: "client"