Add a meta prop to react-admin reference components

[Dreamsorcerer]

Is your feature request related to a problem? Please describe.
I need to pass a boolean flag to the backend when using ReferenceManyField.

Describe the solution you'd like
A meta prop that can be used to send data in the request using the optional meta parameter in the dataProvider.
i.e. <ReferenceManyField ... meta={orm: true}> would result in a referenceMany() call with meta={orm: true}.

Describe alternatives you've considered
As a simple workaround, I've instead done filter={'__meta__': {orm: true}} and then popped it out of the filters in the backend. Though this is a bit of a hack and makes the code less maintainable.

Based on the documentation, it makes it sound like the recommendation is to write a custom component. For such a simple thing, this appears to require copying hundreds of lines of code out of react-admin and maintaining it, which doesn't seem like a viable solution.

[adguernier]

Thanks for this report.

Indeed, <ReferenceManyField> should accept queryOptions with meta inside.
For now, you can use the beforeGetManyReference callback from the withLifecycleCallbacks helper to add meta:

const dataProvider = withLifecycleCallbacks(baseDataProvider, [
    {
        resource: 'comments',
        beforeGetManyReference: async params => {
            return { ...params, meta: { orm: true } };
        },
    },
]);

Feel free to open a PR if you come up with a fix of your own. 🙏 (the <ReferenceOneField> component is a good start).

[christiaanwesterbeek]

Running into this one again. While coding I intuitively add it but I seem to keep forgetting there isn't a queryOptions in ReferenceManyField... It's unfortunate that RA4 is not going to have this feature, since all PR's need to have the next branch as base. Instead I will use useGetManyReference and iterate the data.