This section maps the endpoint names you provided to createApi to the core Redux logic (thunks and selectors) used to trigger data fetches and read cached data for that endpoint. Data fetching is built on top of Redux, leveraging its state management system.

It generates another reducer to add to a redux store that may already have other reducers. In most cases, we will need to execute one request followed by another or multiple requests in parallel.For both of these cases, we should RTKQs onQueryStarted- an optional parameter for the endpoint of the first request. We now support supplying a queryFn option inside of an endpoint definition, in which case that specific endpoint will use the function you provided for fetching data. These tools are still in their infancy, but they are being actively developed. Personally, I am in favor of Kent C. Dodds approach to testing and a testing style that focuses on user experience and user interaction. Disable caching altogether, which comes in handy when you want to migrate toward RTK Query, avoiding cache issues as an initial step. These are the best practices, in my opinion, for the most commonly asked questions I heard from my peers while introducing RTK Query. (https://github.com/rtk-incubator/rtk-query/pull/123), Query endpoint definitions now support the same onStart, onError and onSuccess options that mutation endpoints already did. The generated selector is memoized using Reselect's createSelector. Chng ta s tip tc s dng v d ny demo: https://stackblitz.com/edit/react-router-redux-toolkit-fetch-api?file=src/App.js. Thanks to https://twitter.com/kahirokunn.

To take full advantage of it, we can, and should, use RTKQ for all requests. API definitions and cache invalidation strategies are located in one place. Why is this so important and useful? If you are using RTK Query with React, you'll need to change your imports to: Note that when we move RTK Query over into Redux Toolkit itself, we expect the final entry points to be: We recognize that the entry point paths are a bit lengthy, but we expect that most applications will only need to have these imports in a handful of API slice definition files. Using this configuration property allows us to: This step adds more functionality to the repository page by adding an ability to view commits for each repository, paginate those commits, and filter by branch. Both for persistence and the ability to dispatch the action, we need to define a store configuration for our authentication feature. prepareHeaders can now be an async function. There are many file changes introduced in this step. Have you ever wanted to use Redux with features like React Query provides? The useMutation hook now accepts a selectFromResult option similar to useQuery. Endpoint ny l private v nu khng c token s tr v li 401. Its most helpful when dealing with resources that have both query endpoints and mutation endpoints (e.g. Addon ny cn nhiu chc nng na nh caching, prefetching, polling, code splitting, cc bn hy c thm document trn trang ch ca th vin p dng vo d n. This boilerplate uses react-app-rewired and customize-cra to accomplish that functionality to introduce a custom babel configuration: This makes the developer experience better by allowing imports. That is required because RTK Query identifies and caches a piece of information by the arguments that were used to retrieve that information in the first place. Those are implemented as follows: This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. This requires more thought and work, and should definitely be addressed in a production-ready app. The main method of refreshing data with RTKQ is using Cache Tags. However, there are times you may want to use a custom function for making the request. Thank you!Check out your inbox to confirm your invite. For example, filter state, search term, toggle state, pagination state, etc. If you are using any of these fields and want some help renaming your code to match, we have an initial v2-v3 codemod available at https://github.com/rtk-incubator/rtk-query-codemods . This allows a user to 'optimize renders' by only rerendering when the selected values change. A much safer route than eject is to use something that can modify the configuration, especially if those modifications are small. Nu bn cha tng s dng Redux Toolkit th c th xem bi hng dn ny trc: Hng dn s dng React Router v Redux Toolkit. RTK Query is a good choice for someone already using the Redux ecosystem. We've fixed issues related to SSR and React Fast Refresh. Its important to know that createApi is just an abstraction level over RTKs createSlice(which in itself abstracts createReducer+createAction). Lets add API definitions required to cover the repositories functionality first: Once that is ready, lets introduce a Repository feature consisting of Search/Grid/Pagination: Interaction with the Repositories API is more complex than what we have encountered so far, so lets define custom hooks that will provide us with the ability to: Having this level of separation as a layer of abstraction is important in this case both from a readability perspective and due to the RTK Query requirements. In order for memoization to work correctly, you should create a given selector function once per cache key and reuse that selector function instance, rather than creating a new selector instance each time. // store the requestId to select the mutation result elsewhere. We can provide a tag to the query endpoint (a simple string tag or a more complex object tag), and all resources from this query endpoint will receive the tag. You can now generate full API definitions from OpenAPI definitions. // useMemo is used to only call `.select()` when required. Each endpoint structure contains the following fields: A Redux thunk action creator that you can dispatch to trigger data fetch queries or mutations.

This means we need to be able to get arguments required for an API call separately from the actual API call at any point in time. JavaScript is Synchronous! The typical approach for making actual API requests is to use the fetchBaseQuery wrapper included in RTKQ. There are a number of high-level benefits showcased throughout this article: There are some downsides worth noting as well: We covered a lot in this practical walkthrough using the GitHub API, but there is much more to RTK Query, such as: If youre intrigued by RTK Querys benefits, I encourage you to dig into those concepts further. There now are refetchOnFocus and refetchOnReconnect options for the hooks. * Defaults to `false`. Feel free to use this example as a basis to build on. We have introduced two more endpoints for getting branches and commits, as well as custom hooks for these endpoints, following the style we established during the implementation of repositories: Having done this, we can now improve the UX by prefetching commits data as soon as someone hovers over the repository name: While the hover may seem artificial, this heavily impacts UX in real-world applications, and it is always handy to have such functionality available in the toolset of the library we use for API interaction. in v gi thng tin c nhn c t vn min ph v cc chng trnh hc. You can specify a "minumum age" here. React Hooks users will most likely never need to use these directly, as the hooks automatically dispatch these actions as needed. Another big thing is code generation.

We'll lock this repo once we're ready to switch where issues should be filed. https://github.com/rtk-incubator/rtk-query-codemods, https://github.com/rtk-incubator/rtk-query/pull/106, https://rtk-query-docs.netlify.app/concepts/code-generation, https://rtk-query-docs.netlify.app/concepts/customizing-create-api, https://github.com/rtk-incubator/rtk-query/pull/90, https://github.com/rtk-incubator/rtk-query/pull/80, https://github.com/rtk-incubator/rtk-query/pull/91, https://github.com/rtk-incubator/rtk-query/pull/105, https://github.com/rtk-incubator/rtk-query/pull/117, https://github.com/rtk-incubator/rtk-query/pull/123, https://github.com/rtk-incubator/rtk-query/pull/130, https://github.com/rtk-incubator/rtk-query/pull/133, Add useLazyQuery (#177) @msutkowski, @phryneas, [minor breaking] remove internalQueryArgs, pass endpointDefinition into serializeQueryArgs, rename endpoint to endpointName or endpointDefinition everywhere (#156), Support FormData in fetchBaseQuery (#140) @msutkowski, Clear undefined values from headers (#146) @kahirokunn, Export FetchBaseQueryArgs (#145) @kahirokunn, SSR Support: delete substate.error property (#152) @gfortaine, TypeScript: Loosen dispatch types (#150) @kahirokunn, fetchBaseQuery: Fix: JSON.stringify body when it isJsonifiable and content-type is 'application/json' (#168) @gfortaine, Reset promiseRef on useQuery/Mutation hooks on unmount (#173) @msutkowski. Redux Toolkit has always been UI-agnostic, and the majority of RTK Query is UI-agnostic as well. Gurami always goes out of his way for a perfect solution and is looking forward to working with teams who love what they do as much as he does. This is vital and also requires a substantial amount of effort, which may be difficult to provide depending on the phase of development you are in. You can now call .unwrap on the result from the useMutation hook and mutation.initiate action creator to have the promise resolve with the returned value or throw an exception. The next feature list for authentication includes: To add the ability to retrieve the user, we will need some API boilerplate. Gurami is a full-stack developer for the healthcare, gaming, and entertainment industries. * Note: requires `setupListeners` to have been called. When selecting mutation results rather than queries, the function accepts a request ID instead. Keeping React Query and Redux in sync is painful and requires some custom code overhead, while RTK Query provides out-of-the-box compatibility. To do that, we need to define a middleware component: What this does is straightforward. RTK Query features tools for auto-generating API definitions using OpenAPI standards or GraphQL. We've restructured the docs to better document what is part of createApi, vs what is in the API slice objects generated by createApi. We've had some discussion & requests around the possibility to just subscribe to part of a query result instead of the full result and isFetching/isSuccess/etc., to have more granular rerenders. The APIs are stable enough that you can consider using them in production. Trong trng hp cn lu d liu vo trong store, v d cp nht state Slice khc th lm tng t nh khi dng createAsyncThunk. I usually use `@` pattern when using aliases though but to be honest i don't see a ton of usefulness in it unless used in mono repository context. One thing that we had to add to make this possible is "structural sharing". We're working on filling out the missing docs content now, and will have a complete set of documentation when RTK 1.6 is ready. A big thanks to everyone I forgot to mention here who discussed with us on github, in @reactiflux, or here on Twitter. Now lets add some functionality. RTK Query vn b ph thuc vo s cng knh ca Redux, Vui lng nhp s in thoi xc thc ti khon ca bn. If you want to enforce that all endpoints in a given API slice must supply a queryFn, you can set the API slice to use the fakeBaseQuery instance instead of fetchBaseQuery. The ability to retrieve the user from the GitHub API and provide it for the rest of the app. If you are just concerned about how quickly we find ourselves using many hooks in one component (that uses multiple kinds of data/mutations), you can easily extract all of the hooks calls to a separate custom hook. * If you just want to manually trigger this mutation using `dispatch` and don't care about the. // Return the `unsubscribe` callback to be called in the `useEffect` cleanup step, // The `track` property can be set `false` in situations where we aren't, // interested in the result of the mutation. There is one more thing you need to pay attention to in this piece of code in our API definition: Why? So, if you have a second request that comes back with (partially) similar data, we try to recycle as many object references from the last query result as possible, to prevent unneccessary rerender. It will visit your profile and have the ability to search for repositories and sort them based on certain criteria. An example of optimizing this behavior might look like yourEndpoint.useMutation(undefined, { selectFromResult: () => ({}) }). Now you can, by using the Redux Toolkit and its latest addition: RTK Query. In an enterprise application, it is much easier to contemplate the integrated API, as well as client caching, when everything is in one place. I found RTK Query to be very flexible in that regard. In June 2021, Redux Toolkit introduced a powerful tool for data fetching and caching called RTK Query. In my opinion, connecting more components to the store is not a bad practice and also improves performance. Thanks for https://twitter.com/kahirokunn for bringing this up. RTK Query offers big improvements over Thunk/Saga usage for API interaction with Redux, namely in caching, refetching, prefetching, streaming updates, and optimistic updates, which requires a lot of custom work on top of existing functionality to be accomplished with Thunk and Saga. If people like this API, we might add this to RTKs createAsncThunk as an alternative to unwrapResult. They can handle any global state that is not server data. It also tries to mimic the functionality that youd get on a GitHub page. A set of Redux Toolkit action matching utilities that match the pending, fulfilled, and rejected actions that will be dispatched by this thunk. Big thanks to @fgnass who let us use the type generation from his oazapfts library. The next step is to define an API for retrieving user information from GitHub: We use our custom base query here, meaning that every request in the scope of userApi will include an Authorization header. TLDR; In this post, Ill address the main questions and concerns that fellow developers in my group brought up since we started using RTK Query in our newer apps.