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Graph/redux-action-creator-mismatch

AntiPattern

Redux Action Creator Mismatch

redux-action-creator-mismatch

Action creators and reducers disagree on the expected shape—argument handling, namespacing, thunk status, or TypeScript action types—so RTK dispatches actions that never match .addCase or fail type checks.

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Updated6/27/2026

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30 linked nodes

MATCHESSolution

Tension: despite that being what the react-query docs suggested. Outcome: This solved the type errors too.

MATCHESSolution

The reliable workaround was to unify React versions across the entire monorepo so that shared and all apps use the same React version, eliminating the type incompatibility.

MATCHESSolution

Cast through `unknown` first: `} as unknown as RequestInit)`. — Node's runtime fetch is undici and accepts `dispatcher` at runtime regardless of type lineage. Tension: This bypasses the structural overlap check entirely. Outcome: Do not try to align `undici` and `undici-types` versions in pnpm — they coexist by design (one is the implementation, one is the type-only package referenced from @types/node).

MATCHESSolution

Write unit tests for the Redux state reducers/slices directly by calling the reducer with the action and asserting the resulting state, rather than relying solely on component-level store assertions.

MATCHESSolution

Add a null guard before mutating nested properties (e.g., `if (state) { state.role = action.payload; }`). For setUser, return the next state value instead of reassigning `state` (e.g., `return action.payload`).

MATCHESSolution

Add Reactotron using it as a store enhancer (e.g., via store `enhancers: [Reactotron.createEnhancer()]`) and ensure it’s configured/used with the Redux store instance before calling `.connect()`.

MATCHESSolution

Move the `router.post` logout call and `onFinish` handling into an async action (e.g., `createAsyncThunk`), then update `isLogouting`/`isOpeLogoutDialogue` in the slice via `extraReducers` on pending/fulfilled/rejected to ensure the flags are reset.

MATCHESSolution

Align the state interface with the real thunk payload types (use `Goal[]` instead of `[]`) and explicitly type/cast the thunk `fulfilled` payload and the reducer `action` (including casting `action.error` to `string`).

MATCHESSolution

Use the `CaseReducerWithPrepare` form by providing an object with both `reducer` and `prepare`, so the action’s `PayloadAction` type includes `error`.

MATCHESSolution

Mock `useAppDispatch` to return a `vi.fn()` dispatch function, then assert that the mock dispatch was called with the expected action (e.g., `resetStates()`).

MATCHESSolution

Update the `editTodo` reducer to always return a value in the `map()` callback (return the original `todo` for non-matches), or mutate the found todo directly using Immer without returning `undefined` elements.

MATCHESSolution

Fix the reducer to use only one approach: either mutate the draft without returning a new value (e.g., remove the `return` or use `void`), or avoid mutation and return a fully new state array from `map`.

MATCHESSolution

you need to use the specific customized `AppDispatch` type from the store — For `useDispatch`, the default `Dispatch` type does not know about thunks. Outcome: Update your `src/Client/RedGranite.Client.Web/src/app/hooks.ts` file to the current suggestion.

MATCHESSolution

Define the action creator directly using `createAction` (and pass `type` and payload correctly), e.g., `export const setAbsences = createAction(ABSENCE_ACTION_TYPES.SET_ABSENCES);`, then dispatch it with `dispatch(setAbsences(absences))`.

MATCHESSolution

Dispatch actions using the correct namespaced `type`, e.g. `dispatch({ type: `transactions/${action}`, amount })`, or ensure `action` already includes the `transactions/` prefix.

MATCHESSolution

Tension: cannot itself access any Redux context because none is provided to it from higher up the ReactTree. Outcome: so it can access the provided Redux context.

MATCHESSolution

You are not allowed in Redux, ever, to dispatch from inside a reducer. — Reducer logic has to be a pure synchronous function without side effects. Tension: You might want to do the logic you are currently doing in a thunk or with the listener middleware instead. Outcome: You have to use `createAsyncThunk` for that.

MATCHESSolution

An async function was passed to useActionState.

MATCHESSolution

Redux-Toolkit also ships with Thunk middleware included and enabled by default — If you needed to configure and/or add middleware, use the `getDefaultMiddleware` utility.

MATCHESSolution

Define the payloadCreator with only the thunkApi argument: use `async (_, { rejectWithValue }) => { ... }` or `async ({ rejectWithValue }) => { ... }` style as appropriate, and dispatch the thunk without any argument.

MATCHESSolution

convert the object into the builder callback syntax — createSlice({ name, initialState, reducers: { /* case reducers here */ },. Tension: object syntax for `createSlice.extraReducers` has been deprecated. Outcome: builder => { builder.addCase(todoAdded, (state, action) => {}) }.

MATCHESSolution

Move the `Auth()` invocation into a thunk action (or call it from the component) and have the reducer handle only state updates based on the thunk’s dispatched success/failure actions.

MATCHESSolution

Stop using `nativeEvent.path` in the action payload. Dispatch explicit values instead (e.g., pass the trait `id` and input value directly in `payload` from the UI) and update the reducer based on those fields.

MATCHESSolution

Update the reducer logic to access into `action.payload.applicationUser` property. — Redux-Toolkit slice reducers. Tension: the reducer is accessing some `user` property that doesn't exist in the response object. Outcome: Mutate state directly.

MATCHESSolution

Add extraReducers/addMatchers for each mutation endpoint (addTour, editTour, removeTour) to update `state.tour` on `matchFulfilled`, or use RTK Query tags and invalidation so queries refetch and state stays in sync.

MATCHESSolution

Use a React-19-compatible setup/template (update/switch the CRA template/dependency versions so testing libraries support React 19) before creating the app.

MATCHESSolution

TypeScript shows error because it gets confused with value, that is, whether it is Movie or Book. — I was creating Select component in React with Typescript. Tension: But, if we use type narrowing then not working anyways. Outcome: Does using a type guard work for you?

MATCHESSolution

case "CallbackRouteError": return { error: "Invalid credentials!" } — in my `login.ts` server action in the switch case clause. Tension: to return the correct errors. Outcome: bypass this error.

MATCHESSolution

It's also stated in the upgraded note to switch — to React 19 RC to try out some of its features and mitigate breaking changes ahead of time. Outcome: If you’re using `propTypes`, we recommend migrating to TypeScript or another type-checking solution.

MATCHESSolution

Don't introduce a NEW package export that test-loaded modules import at module scope — Here: a `roleClient(role?)` helper in the consumer package (`etl/llm-route.ts`). Tension: it forces you to update every `vi.mock` factory, and missing one re-breaks CI.

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