Headers from context are overwritten from mutate headers

[dan-cooke]

The components file generates react query mutations like this

export const useDocumentsControllerCreate = (
  options?: Omit<
    reactQuery.UseMutationOptions<
      Schemas.Document,
      DocumentsControllerCreateError,
      DocumentsControllerCreateVariables
    >,
    'mutationFn'
  >
) => {
  const { fetcherOptions } = useTempliContext();
  return reactQuery.useMutation<
    Schemas.Document,
    DocumentsControllerCreateError,
    DocumentsControllerCreateVariables
  >({
    mutationFn: (variables: DocumentsControllerCreateVariables) =>
      fetchDocumentsControllerCreate({ ...fetcherOptions, ...variables }),
    ...options,
  });
};

Current Behaviour

With this Context

export function use<namespace>Context...
 // -- snip
  return {
    fetcherOptions: {
      headers: {
        Authorization: `Bearer ${token}`,
      },
    },
    queryOptions: {
      enabled: token !== null && _queryOptions?.enabled,
    },
    queryKeyFn,
  };
}

And using a mutation somewhere

 const { mutate: create } = useDocumentsControllerCreate({});


// -- snip
    create({
      headers: {
        // 1. Headers set here will overwrite any headers set by the context
        'Content-Type': 'multipart/form-data',
      },
    });

This results in the context headers being overwritten (and any other fetcherOptions)
Ie. my mutation is sent without Authorisation header

Desired behaviour

The fetcherOptions should be merged with the mutation variables, this can be achieved with lodash merge or something similar

Desired change in generated code

export const useTemplatesControllerRemoveInput = (
  options?: Omit<
    reactQuery.UseMutationOptions<
      undefined,
      TemplatesControllerRemoveInputError,
      TemplatesControllerRemoveInputVariables
    >,
    'mutationFn'
  >
) => {
  const { fetcherOptions } = useTempliContext();
  return reactQuery.useMutation<
    undefined,
    TemplatesControllerRemoveInputError,
    TemplatesControllerRemoveInputVariables
  >({
    mutationFn: (variables: TemplatesControllerRemoveInputVariables) =>
---       fetchTemplatesControllerRemoveInput({ ...fetcherOptions, ...variables }),
+++       fetchTemplatesControllerRemoveInput({ merge(fetcherOptions, variables) }),
    ...options,
  });
};