[BUG] Using GraphQL as the data provider, Refines hooks like useUpdate, onMutationSuccess, onSuccess, etc return undefined data

[maximdolphin]

Describe the bug

I am trying to make a form submission with Refine, and for some reason anytime I try to receive the data from the mutation, it returns it as undefined but says the mutation was successful. Here's what my backend returns for instance:
{
"id": 37,
"title": "schedule",
"semesterId": "Spring 2025",
"entries": []
}

Steps To Reproduce

    const {formProps, modalProps, close, mutationResult} = useModalForm({
            action: "create",
            defaultVisible: true,
            meta: {
                select: "*",
                gqlMutation: CREATE_CLASS_SCHEDULE_MUTATION,
            },
        onMutationSuccess: (response) => {
            console.log('Full response:', response);
            const createdSchedule = response?.data?.createClassSchedule;
            if (createdSchedule) {
                console.log('Created schedule:', createdSchedule);
                onFinish(createdSchedule as ClassSchedule);
                close();
                onClose();
            } else {
                console.error('Created schedule data is missing from the response');
            }
        },
            onMutationError: () => {
                throw new Error("Failed to create schedule");
            },
        }
    );

Expected behavior

The data should've returned in that aforementioned style, but yet it keeps returning data undefined and context undefined

Packages

• @refinedev/[email protected]
• @refinedev/[email protected]

Additional Context

No response

[alicanerdurmaz]

Hello @maximdolphin, thanks for the issue.

By default, @refinedev/graphql gets data from a response like this:

• https://github.com/refinedev/refine/blob/main/packages/graphql/src/dataProvider/index.ts#L159
• https://github.com/refinedev/refine/blob/main/packages/graphql/src/dataProvider/options.ts#L214

const key = `updateOne${camelcase(singular(params.resource), {
       pascalCase: true,
})}`;

return response.data?.[key]

If your backend returns a different format, you need to give your dataMapper to get your data.