GraphQL does not throw mutation errors

[chris-rudmin]

When doing a mutation shopify.graphql(mutationQuery) where the query is a mutation such as:

mutation {
  customerCreate(
    input: {
      ...
    }
  )
  {
    customer {
      id
      displayName
    }
    userErrors {
      field
      message
    }
  }
}

Errors are returned in the userErrors field. However the request promise resolves successfully. I was expecting the error to be thrown as it is done for normal queries.

[lpinca]

The field used to check for errors is errors:

Shopify-api-node/index.js

Lines 236 to 246 in c949c7d

	if (res.body.errors) {
	const first = res.body.errors[0];
	const err = new Error(first.message);
	err.locations = first.locations;
	err.path = first.path;
	err.extensions = first.extensions;
	err.response = res;
	throw err;
	}

[chris-rudmin]

@lpinca I see that. According to all the Shopify docs I have seen. Mutation queries will have any error in the field userErrors

Some example doc references:
https://shopify.dev/docs/admin-api/graphql/reference/customers/customeraddtaxexemptions
https://shopify.dev/docs/admin-api/graphql/reference/customers/customercreate
https://shopify.dev/docs/admin-api/graphql/reference/orders/ordereditsetquantity

[lpinca]

Feel free to open a PR.