2. Adding Edit Page

First, let's create our file under the src/pages/blog-posts folder. We will name it edit.tsx. Then, we will copy the edit page code generated by Inferencer and paste it into the file.

To copy the code and paste it into the file, follow the steps below:

1. Navigate to the localhost:3000/blog-posts in your browser.

2. To open the edit page, click any "Edit" button in the "Actions" column of the table.

3. On the edit page, click on the "Show Code" button in the bottom right corner of the page.

4. You can see the edit page code generated by Inferencer. Click on the "Copy" button to copy the code.

5. Paste the code into the you created, edit.tsx file.

You can see the edit page code generated by Inferencer below:

Instead of coding the edit page component from scratch, Inferencer created the required code based on API response, so that we can customize.

We will go through the edit page components and hooks one by one.

• <Edit/> is a refine component that is used to presentation purposes like showing the title of the page, save button, refresh button etc.

  Refer to the <Edit/> documentation for more information →

• useForm hook, imported from @pankod/refine-react-hook-form package, has been developed by using the React Hook Form and useForm hook imported from @pankod/refine-core package.

  It provides all the features of the useForm hook from @pankod/refine-core package as well as the useForm hook from React Hook Form.

  It also provides the saveButtonProps prop that we can pass to the submit button of the form.

  When you use useForm in the edit page, it automatically fetches the data of the record by using the id in the URL, then fills the form with the data. It sends the form data to dataProvider's update method when the form is submitted.

  Refer to the @pankod/refine-react-hook-form useForm documentation for more information →

  Refer to the React Hook Form documentation for more information →

• All other components provided by Material UI are used to display the form fields.

  Refer to the Material UI documentation for more information →

In the edit page, we may need to select a record from another resource. For example, we may need to select a category from the categories resource to assign the blog post to the category. In this case, we can use the useAutocomplete hook provided by refine. This hook fetches the data by passing the params to the dataProvider's getList method. Then, it returns the necessary props for the <Autocomplete/> component.

Refer to the useAutocomplete documentation for more information →

Refer to the Material UI <Autocomplete/> documentation for more information →

In the auto-generated edit page code, Inferencer used the useAutocomplete hook to select a category from the categories resource like below:

const { autocompleteProps: categoryAutocompleteProps } = useAutocomplete({
  resource: "categories",
});

useAutocomplete returns 10 record by default, but the category of the blog post may not be in the first 10 records. To solve this problem, we can use the defaultValue prop to set the default value of the useAutocomplete hook like below:

const { autocompleteProps: categoryAutocompleteProps } = useAutocomplete({
  resource: "categories",
  defaultValue: blogPostsData?.category?.id,
});

Now that we have created the edit page, we need to add it to the App.tsx file.

1. Open src/App.tsx file on your editor.

2. Import the created BlogPostEdit component.

3. Replace the MuiInferencer component with the BlogPostEdit component.

import { Refine } from "@pankod/refine-core";
import {
  Layout,
  ReadyPage,
  ErrorComponent,
  LightTheme,
  CssBaseline,
  GlobalStyles,
  ThemeProvider,
  RefineSnackbarProvider,
  useNotificationProvider,
} from "@pankod/refine-mui";
import routerProvider from "@pankod/refine-react-router-v6";
import dataProvider from "@pankod/refine-simple-rest";
import { MuiInferencer } from "@pankod/refine-inferencer/mui";

import { BlogPostList } from "pages/blog-posts/list";
import { BlogPostEdit } from "pages/blog-posts/edit";

const App: React.FC = () => {
  return (
    <ThemeProvider theme={LightTheme}>
      <CssBaseline />
      <GlobalStyles styles={{ html: { WebkitFontSmoothing: "auto" } }} />
      <RefineSnackbarProvider>
        <Refine
          routerProvider={routerProvider}
          dataProvider={dataProvider("https://api.fake-rest.refine.dev")}
          notificationProvider={useNotificationProvider}
          Layout={Layout}
          ReadyPage={ReadyPage}
          catchAll={<ErrorComponent />}
          resources={[
            {
              name: "blog_posts",
              list: BlogPostList,
              edit: BlogPostEdit,
              show: MuiInferencer,
              create: MuiInferencer,
            },
          ]}
        />
      </RefineSnackbarProvider>
    </ThemeProvider>
  );
};
export default App;

Now, we can see the edit page in the browser at localhost:3000/blog-posts/edit/123