Undefined query parameter with fallback value is saved undefined in the cache

[ancaspatariu]

This one is rtk query related.

For a function like this:

query: ({
		page = DEFAULT_PAGE,
		size = DEFAULT_PAGE_SIZE,


	}) => {
		return {
			url: `...`,
			method: "GET",
			params: {
				page,
				size,
			},
		};
	},

If a parameter is omitted, the GET call is done properly, but the cache entry (as it is returned by api.util.selectInvalidatedBy(getState(), ["Tag"]) is saved with an undefined value instead of the fallback value.

[markerikson]

@ancaspatariu that looks like expected behavior to me.

You passed in undefined as the actual argument, so that's all that RTKQ has access to. RTKQ can't know that you had a default value inside the function, nor that it was intended to be used as the cache key.