Redux RTK reloading state when calling getSelectors - react-redux

Question

I am new to Redux RTK so the problem might not exactly be on calling getSelectors(). However, when I'm using the state that comes from getSelectors() it reloads the entire state.
Problem
The baseline is that I have different Setup objects that I'm calling based on the documentId. These Setup objects are quite large so in the getSetups I am only fetching some basic properties. Then, when the user selects a specific Setup from the dropdown I want to save it in the setupSlice. But when I trigger the dispatch(setSetup(data)) the RTK reloads all the Setups.
I encounter an infinite loop when after fetching all the Setup objects I want to automatically assign the default Setup to the setupSlice.
Extra
Ideally when I assign a Setup to the setupSlice I would like to call the getSetup from RTK to fetch the entire Setup object of that specific Setup and store it in the setupSlice.
I am not sure if this is suppose to be happening but is there anyway to stop it? Otherwise is there any recommendation so I can move forward?
This is the component I'm trying to generate:
const SetupDropdown = () => {
const dispatch = useDispatch()
const { documentId } = useParams()
const { data, isFetching } = useGetSetupsQuery({ documentId })
let setupsMenu;
const { selectAll: selectAllSetups } = getSelectors({documentId})
const allSetups = useSelector(selectAllSetups)
if (!isFetching) {
const defaultSetup = allSetups.find((setup) => setup.default)
setupsMenu = allSetups.map(setup => {
return (<MenuItem value={setup.id}>{setup.name}</MenuItem>)
})
dispatch(setSetup(defaultSetup))
}
const setupId = useSelector(selectSetupId)
const handleChange = async (event) => {
// Here I ideally call the getSetup RTK Query to fetch the entire information of the single setup
const data = {
id: event.target.value,
name: 'Random name'
}
dispatch(setSetup(data))
};
return (
<FormControl sx={{ minWidth: 200 }} size="small">
<InputLabel>Setup</InputLabel>
<Select
value={setupId}
onChange={handleChange}
label="Setup"
>
{setupsMenu}
</Select>
</FormControl>
)
}
export default SetupDropdown;
This is the setupApiSlice:
const setupsAdapter = createEntityAdapter({
sortComparer: (a, b) => b.date.localeCompare(a.date)
})
const initialState = setupsAdapter.getInitialState()
export const setupsApiSlice = apiSlice.injectEndpoints({
tagTypes: ['Setup'],
endpoints: builder => ({
getSetups: builder.query({
query: ({ documentId }) => ({
url: `/documents/${documentId}/setups`,
method: 'GET'
}),
transformResponse: responseData => {
return setupsAdapter.setAll(initialState, responseData)
},
providesTags: (result, error, arg) => [
{ type: 'Setup', id: "LIST" },
...result.ids.map(id => ({ type: 'Setup', id }))
]
}),
getSetup: builder.query({
query: ({ documentId, setupId }) => ({
url: `/documents/${documentId}/setups/${setupId}`,
method: 'GET'
})
})
})
})
export const {
useGetSetupsQuery,
useGetSetupQuery
} = setupsApiSlice
// Define function to get selectors based on arguments (query) of getSetups
export const getSelectors = (
query,
) => {
const selectSetupsResult = setupsApiSlice.endpoints.getSetups.select(query)
const adapterSelectors = createSelector(
selectSetupsResult,
(result) => setupsAdapter.getSelectors(() => result?.data ?? initialState)
)
return {
selectAll: createSelector(adapterSelectors, (s) =>
s.selectAll(undefined)
),
selectEntities: createSelector(adapterSelectors, (s) =>
s.selectEntities(undefined)
),
selectIds: createSelector(adapterSelectors, (s) =>
s.selectIds(undefined)
),
selectTotal: createSelector(adapterSelectors, (s) =>
s.selectTotal(undefined)
),
selectById: (id) => createSelector(adapterSelectors, (s) =>
s.selectById(s, id)
),
}
}
This is the setupSplice:
const initialState = {
name: null,
filters: [],
data: {},
status: 'idle', //'idle' | 'loading' | 'succeeded' | 'failed'
error: null
}
const setupSlice = createSlice({
name: 'setup',
initialState,
reducers: {
setSetup: (state, action) => {
console.log('Dispatch')
const setup = action.payload;
console.log(setup)
state.id = setup.id;
state.name = setup.name;
state.filters = setup.filters;
state.data = setup.state;
state.status = 'succeeded';
}
}
})
export const { setSetup } = setupSlice.actions;
export const selectSetupId = (state) => state.setup.id;
export const selectSetupName = (state) => state.setup.name;
export const selectSetupFilters = (state) => state.setup.filters;
export const selectSetupData = (state) => state.setup.data;
export default setupSlice.reducer;

Answer 1

Tbh., you probably should be using selectFromResult in your useGetSetupsQuery instead of adding another useSelector hook. That would also reduce your code complexity by a lot.
Your problem as hand is that you are creating those selectors within your component on each render - so they don't have a chance to actually memoize and give you a stable result. If you do that in your component, wrap it in a useMemo call to keep your selector instances as stable as possible.