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Version: 3.xx.xx

1. Adding List Page

In Unit 2.4, we created the CRUD pages automatically with Inferencer. In this unit, we will create the CRUD pages manually using the codes generated by Inferencer. So, you can customize the pages as you wish.

Creating List Page

First, let's create our file under the src/pages/products folder. We will name it list.tsx. Then, we will copy the list 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/products in your browser.

  2. Click on the "Show Code" button in the bottom right corner of the page.

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

  4. Paste the code into the you created, list.tsx file.

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

http://localhost:3000/products

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

Understanding the List Component

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

Handling Relationships

Each product includes the category field which has id property. This is a foreign key that points to the categories resource which is different than "product" resource.

There is a title field In the categories resource. To display the category title in the table, we can use the useMany hook provided by refine.

This hook allows us to fetch data for multiple records in a single request by providing the id's of the related records. In this case, we need to provide the id's of the products categories. It is particularly useful when we need to fetch related data for multiple records.

Refer to the useMany documentation for more information

In this tutorial, each product record has a category field as below:

https://api.fake-rest.refine.dev/products
{
...
"category": {
"id": 1
}
...
},
{
...
"category": {
"id": 2
}
...
}

We can use the useMany hook to fetch the full category records for each of these products, like this:

import { useMany } from "@pankod/refine-core";

const { data } = useMany({
resource: "categories",
ids: products.map((product) => product.category.id),
});

This will pass the resource and ids to the dataProvider's getMany function. The dataProvider will then make a single request to the API to fetch the full records for each category related to the products. The resulting data variable will be an array of category records, like this:

[
{
id: 1,
title: "mock category title",
},
{
id: 2,
title: "another mock category title",
},
];

We can then use this data array to display the title of each category in the table.

Adding the List Page to the App

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

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

  2. Import the created ProductList component.

  3. Replace the MuiInferencer component with the ProductList component.

src/App.tsx
import { Refine } from "@pankod/refine-core";
import {
Layout,
ReadyPage,
ErrorComponent,
LightTheme,
CssBaseline,
GlobalStyles,
ThemeProvider,
RefineSnackbarProvider,
notificationProvider,
} 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 { ProductList } from "pages/products/list";

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={notificationProvider}
Layout={Layout}
ReadyPage={ReadyPage}
catchAll={<ErrorComponent />}
resources={[
{
name: "products",
list: ProductList,
edit: MuiInferencer,
show: MuiInferencer,
create: MuiInferencer,
},
]}
/>
</RefineSnackbarProvider>
</ThemeProvider>
);
};
export default App;

Now, we can see the list page in the browser at localhost:3000/products



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