RTKQ: useLazyQuery - calling of trigger function with different arguments makes unsubscribe

[greskosa]

Hello 👋

Documentation for useLazyQuery says about one of the feature:

'Subscribes' the component to keep cached data in the store, and 'unsubscribes' when the component unmounts

But there is no mention about unsubscribing when trigger function was called a few times with different arguments.

Example:

const preferCacheValue = true; // use the value from a cache if exists
const [trigger, { data }] = useLazyEnpointQuery();

trigger({ id: 1 }, preferCacheValue); 
// asynchronous fetching of data for id 1 and putting it to the cache

trigger({ id: 2 }, preferCacheValue); 
// first action [nameOfApi]/subscriptions/unsubscribeQueryResult is called
// that causes clearing of cache for previous id, and then
// asynchronous fetching of data for id 2 and putting it to the cache

It always makes unsubscribe and clearing of cache for previous id but I need to keep both results in the cache and clear them only on component unmount. Is there any way to control that?

Thanks for help!

[phryneas]

No, that's not supported. The hooks are generally always only meant to monitor the "last result", so any results previous to that will be unsubscribed.

You probably need hand-written logic that dispatches endpoint.initiate() calls.

[greskosa]

@phryneas thanks for the quick reply. Is there any chance to update the documentation to have a more precise description of how cache clearing works for this particular case?

[phryneas]

A PR would be very welcome.