Add support for mutationMode in useCreate

docs/Create.md

@@ -60,6 +60,7 @@ You can customize the `<Create>` component using the following props:
 * `className`: passed to the root component
 * [`component`](#component): override the root component
 * [`disableAuthentication`](#disableauthentication): disable the authentication check
+* [`mutationMode`](#mutationmode): switch to optimistic or undoable mutations (pessimistic by default)
 * [`mutationOptions`](#mutationoptions): options for the `dataProvider.create()` call
 * [`record`](#record): initialize the form with a record
 * [`redirect`](#redirect): change the redirect location after successful creation
@@ -154,6 +155,34 @@ const PostCreate = () => (
 );
 ```
 
+## `mutationMode`
+
+The `<Create>` view exposes a Save button, which perform a "mutation" (i.e. it creates the data). React-admin offers three modes for mutations. The mode determines when the side effects (redirection, notifications, etc.) are executed:
+
+- `pessimistic` (default): The mutation is passed to the dataProvider first. When the dataProvider returns successfully, the mutation is applied locally, and the side effects are executed. 
+- `optimistic`: The mutation is applied locally and the side effects are executed immediately. Then the mutation is passed to the dataProvider. If the dataProvider returns successfully, nothing happens (as the mutation was already applied locally). If the dataProvider returns in error, the page is refreshed and an error notification is shown. 
+- `undoable`: The mutation is applied locally and the side effects are executed immediately. Then a notification is shown with an undo button. If the user clicks on undo, the mutation is never sent to the dataProvider, and the page is refreshed. Otherwise, after a 5 seconds delay, the mutation is passed to the dataProvider. If the dataProvider returns successfully, nothing happens (as the mutation was already applied locally). If the dataProvider returns in error, the page is refreshed and an error notification is shown.
+
+By default, pages using `<Create>` use the `pessimistic` mutation mode as the new record identifier is often generated on the backend. However, should you decide to generate this identifier client side, you can change the `mutationMode` to either `optimistic` or `undoable`:
+
+```jsx
+const PostCreate = () => (
+    <Create mutationMode="optimistic" transform={data => ({ id: generateId(), ...data })}>
+        // ...
+    </Create>
+);
+```
+
+And to make the record creation undoable:
+
+```jsx
+const PostCreate = () => (
+    <Create mutationMode="undoable" transform={data => ({ id: generateId(), ...data })}>
+        // ...
+    </Create>
+);
+```
+
 ## `mutationOptions`
 
 You can customize the options you pass to react-query's `useMutation` hook, e.g. to pass [a custom `meta`](./Actions.md#meta-parameter) to the `dataProvider.create()` call.

docs/CreateBase.md

@@ -46,6 +46,7 @@ You can customize the `<CreateBase>` component using the following props, docume
 
 * `children`: the components that renders the form
 * [`disableAuthentication`](./Create.md#disableauthentication): disable the authentication check
+* [`mutationMode`](./Create.md#mutationmode): Switch to optimistic or undoable mutations (pessimistic by default)
 * [`mutationOptions`](./Create.md#mutationoptions): options for the `dataProvider.create()` call
 * [`record`](./Create.md#record): initialize the form with a record
 * [`redirect`](./Create.md#redirect): change the redirect location after successful creation

docs/useCreate.md

@@ -9,7 +9,7 @@ This hook allows to call `dataProvider.create()` when the callback is executed.
 
 ## Syntax
 
-```jsx
+```tsx
 const [create, { data, isPending, error }] = useCreate(
     resource,
     { data, meta },
@@ -19,7 +19,7 @@ const [create, { data, isPending, error }] = useCreate(
 
 The `create()` method can be called with the same parameters as the hook:
 
-```jsx
+```tsx
 create(
     resource,
     { data },
@@ -31,7 +31,7 @@ So, should you pass the parameters when calling the hook, or when executing the
 
 ## Usage
 
-```jsx
+```tsx
 // set params when calling the hook
 import { useCreate, useRecordContext } from 'react-admin';
 
@@ -61,6 +61,267 @@ const LikeButton = () => {
 };
 ```
 
+## Params
+
+The second argument of the `useCreate` hook is an object with the following properties:
+
+- `data`: the new data for the record,
+- `meta`: an object to pass additional information to the dataProvider (optional).
+
+```tsx
+const LikeButton = () => {
+    const record = useRecordContext();
+    const like = { postId: record.id };
+    const [create, { isPending, error }] = useCreate('likes', { data: like });
+    const handleClick = () => {
+        create()
+    }
+    if (error) { return <p>ERROR</p>; }
+    return <button disabled={isPending} onClick={handleClick}>Like</button>;
+};```
+
+`data` the record to create.
+
+`meta` is helpful for passing additional information to the dataProvider. For instance, you can pass the current user to let a server-side audit system know who made the creation.
+
+## Options
+
+`useCreate`'s third parameter is an `options` object with the following properties:
+
+- `mutationMode`,
+- `onError`,
+- `onSettled`,
+- `onSuccess`,
+- `returnPromise`.
+
+```tsx
+const notify = useNotify();
+const redirect = useRedirect();
+const like = { postId: record.id };
+const [create, { isPending, error }] = useCreate(
+    'likes',
+    { data: like },
+    {
+        mutationMode: 'optimistic',
+        onSuccess: () => {
+            notify('Like created');
+            redirect('/reviews');
+        },
+        onError: (error) => {
+            notify(`Like creation error: ${error.message}`, { type: 'error' });
+        },
+    });
+
+```
+
+Additional options are passed to [React Query](https://tanstack.com/query/v5/)'s [`useMutation`](https://tanstack.com/query/v5/docs/react/reference/useMutation) hook. This includes:
+
+- `gcTime`,
+- `networkMode`,
+- `onMutate`,
+- `retry`,
+- `retryDelay`,
+- `mutationKey`,
+- `throwOnError`.
+
+Check [the useMutation documentation](https://tanstack.com/query/v5/docs/react/reference/useMutation) for a detailed description of all options.
+
+**Tip**: In react-admin components that use `useCreate`, you can override the mutation options using the `mutationOptions` prop. This is very common when using mutation hooks like `useCreate`, e.g., to display a notification or redirect to another page.
+
+For instance, here is a button using `<Create mutationOptions>` to notify the user of success using the bottom notification banner:
+
+{% raw %}
+```tsx
+import * as React from 'react';
+import { useNotify, useRedirect, Create, SimpleForm } from 'react-admin';
+
+const PostCreate = () => {
+    const notify = useNotify();
+    const redirect = useRedirect();
+
+    const onSuccess = (data) => {
+        notify(`Changes saved`);
+        redirect(`/posts/${data.id}`);
+    };
+
+    return (
+        <Create mutationOptions={{ onSuccess }}>
+            <SimpleForm>
+                ...
+            </SimpleForm>
+        </Create>
+    );
+}
+```
+{% endraw %}
+
+## Return Value
+
+The `useCreate` hook returns an array with two values:
+
+- the `create` callback, and
+- a mutation state object with the following properties:
+  - `data`,
+  - `error`,
+  - `isError`,
+  - `isIdle`,
+  - `isPending`,
+  - `isPaused`,
+  - `isSuccess`,
+  - `failureCount`,
+  - `failureReason`,
+  - `mutate`,
+  - `mutateAsync`,
+  - `reset`,
+  - `status`,
+  - `submittedAt`,
+  - `variables`.
+
+The `create` callback can be called with a `resource` and a `param` argument, or, if these arguments were defined when calling `useCreate`, with no argument at all:
+
+```jsx
+// Option 1: define the resource and params when calling the callback
+const [create, { isPending }] = useCreate();
+const handleClick = () => {
+    create(resource, params, options);
+};
+
+// Option 2: define the resource and params when calling the hook
+const [create, { isPending }] = useCreate(resource, params, options);
+const handleClick = () => {
+    create();
+};
+```
+
+For a detailed description of the mutation state, check React-query's [`useMutation` documentation](https://tanstack.com/query/v5/docs/react/reference/useMutation).
+
+Since `useCreate` is mainly used in event handlers, success and error side effects are usually handled in the `onSuccess` and `onError` callbacks. In most cases, the mutation state is just used to disable the save button while the mutation is pending.
+
+## `mutationMode`
+
+The `mutationMode` option lets you switch between three rendering modes, which change how the success side effects are triggered:
+
+- `pessimistic` (the default)
+- `optimistic`, and
+- `undoable`
+
+**Note**: For `optimistic` and `undoable` modes, the record `id` must be generated client side. Those two modes are useful when building local first applications.
+
+Here is an example of using the `optimistic` mode:
+
+```jsx
+// In optimistic mode, ids must be generated client side
+const id = uuid.v4();
+const [create, { data, isPending, error }] = useCreate(
+    'comments',
+    { data: { id, message: 'Lorem ipsum' } },
+    { 
+        mutationMode: 'optimistic',
+        onSuccess: () => { /* ... */},
+        onError: () => { /* ... */},
+    }
+);
+```
+
+In `pessimistic` mode, the `onSuccess` side effect executes *after* the dataProvider responds.
+
+In `optimistic` mode, the `onSuccess` side effect executes just before the `dataProvider.create()` is called, without waiting for the response.
+
+In `undoable` mode, the `onSuccess` side effect fires immediately. The actual call to the dataProvider is delayed until the create notification hides. If the user clicks the undo button, the `dataProvider.create()` call is never made.
+
+See [Optimistic Rendering and Undo](./Actions.md#optimistic-rendering-and-undo) for more details.
+
+**Tip**: If you need a side effect to be triggered after the dataProvider response in `optimistic` and `undoable` modes, use the `onSettled` callback.
+
+## `onError`
+
+The `onError` callback is called when the mutation fails. It's the perfect place to display an error message to the user.
+
+```jsx
+const notify = useNotify();
+const [create, { data, isPending, error }] = useCreate(
+    'comments',
+    { id: record.id, data: { isApproved: true } },
+    { 
+        onError: () => {
+            notify('Error: comment not approved',  { type: 'error' });
+        },
+    }
+);
+```
+
+**Note**: If you use the `retry` option, the `onError` callback is called only after the last retry has failed.
+
+## `onSettled`
+
+The `onSettled` callback is called at the end of the mutation, whether it succeeds or fails. It will receive either the `data` or the `error`.
+
+```jsx
+const notify = useNotify();
+const [create, { data, isPending, error }] = useCreate(
+    'comments',
+    { id: record.id, data: { isApproved: true } },
+    { 
+        onSettled: (data, error) => {
+            // ...
+        },
+    }
+);
+```
+
+**Tip**: The `onSettled` callback is perfect for calling a success side effect after the dataProvider response in `optimistic` and `undoable` modes.
+
+## `onSuccess`
+
+The `onSuccess` callback is called when the mutation succeeds. It's the perfect place to display a notification or to redirect the user to another page.
+
+```jsx
+const notify = useNotify();
+const redirect = useRedirect();
+const [create, { data, isPending, error }] = useCreate(
+    'comments',
+    { id: record.id, data: { isApproved: true } },
+    { 
+        onSuccess: () => {
+            notify('Comment approved');
+            redirect('/comments');
+        },
+    }
+);
+```
+
+In `pessimistic` mutation mode, `onSuccess` executes *after* the `dataProvider.create()` responds. React-admin passes the result of the `dataProvider.create()` call as the first argument to the `onSuccess` callback.
+
+In `optimistic` mutation mode, `onSuccess` executes *before* the `dataProvider.create()` is called, without waiting for the response. The callback receives no argument.
+
+In `undoable` mutation mode, `onSuccess` executes *before* the `dataProvider.create()` is called. The actual call to the dataProvider is delayed until the create notification hides. If the user clicks the undo button, the `dataProvider.create()` call is never made. The callback receives no argument.
+
+## `returnPromise`
+
+By default, the `create` callback that `useCreate` returns is synchronous and returns nothing. To execute a side effect after the mutation has succeeded, you can use the `onSuccess` callback.
+
+If this is not enough, you can use the `returnPromise` option so that the `create` callback returns a promise that resolves when the mutation has succeeded and rejects when the mutation has failed.
+
+This can be useful if the server changes the record, and you need the newly created data to create/update another record. 
+
+```jsx
+const [create] = useCreate(
+    'posts',
+    { id: record.id, data: { isPublished: true } },
+    { returnPromise: true }
+);
+const [create] = useCreate('auditLogs');
+
+const createPost = async () => {
+    try {
+        const post = await create();
+        create('auditLogs', { data: { action: 'create', recordId: post.id, date: post.createdAt } });
+    } catch (error) {
+        // handle error
+    }
+};
+```
+
 ## TypeScript
 
 The `useCreate` hook accepts a generic parameter for the record type and another for the error type:

docs/useCreateController.md

@@ -50,6 +50,7 @@ export const BookCreate = () => {
 `useCreateController` accepts an object with the following keys, all optional:
 
 * [`disableAuthentication`](./Create.md#disableauthentication): Disable the authentication check
+* [`mutationMode`](./Create.md#mutationmode): Switch to optimistic or undoable mutations (pessimistic by default)
 * [`mutationOptions`](./Create.md#mutationoptions): Options for the `dataProvider.create()` call
 * [`record`](./Create.md#record): Use the provided record as base instead of fetching it
 * [`redirect`](./Create.md#redirect): Change the redirect location after successful creation
@@ -65,6 +66,7 @@ These fields are documented in [the `<Create>` component](./Create.md) documenta
 ```jsx
 const {
     defaultTitle, // Translated title based on the resource, e.g. 'Create New Post'
+    mutationMode, // Mutation mode argument passed as parameter, or 'pessimistic' if not defined
     record, // Default values of the creation form
     redirect, // Default redirect route. Defaults to 'list'
     resource, // Resource name, deduced from the location. e.g. 'posts'

packages/ra-core/src/controller/create/CreateBase.spec.tsx

@@ -53,7 +53,7 @@ describe('CreateBase', () => {
                     test: 'test',
                 },
                 { data: { test: 'test' }, resource: 'posts' },
-                undefined
+                { snapshot: [] }
             );
         });
     });
@@ -85,7 +85,7 @@ describe('CreateBase', () => {
                     test: 'test',
                 },
                 { data: { test: 'test' }, resource: 'posts' },
-                undefined
+                { snapshot: [] }
             );
         });
         expect(onSuccess).not.toHaveBeenCalled();
@@ -112,7 +112,7 @@ describe('CreateBase', () => {
             expect(onError).toHaveBeenCalledWith(
                 { message: 'test' },
                 { data: { test: 'test' }, resource: 'posts' },
-                undefined
+                { snapshot: [] }
             );
         });
     });
@@ -139,7 +139,7 @@ describe('CreateBase', () => {
             expect(onErrorOverride).toHaveBeenCalledWith(
                 { message: 'test' },
                 { data: { test: 'test' }, resource: 'posts' },
-                undefined
+                { snapshot: [] }
             );
         });
         expect(onError).not.toHaveBeenCalled();