Paginaton

How does the pagination work how should the backend api be created

40 Replies

Hi @natztheking. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- Refine provides a useTable hook that has a pagination feature. The pagination is done by passing the current and pageSize keys to the pagination object. The current is the current page, and the pageSize is the number of records per page. By default, the current is 1 and the pageSize is 10. You can change default values by passing the pagination.current and pagination.pageSize props to the useTable hook. You can also change the current and pageSize values by using the setCurrent and setPageSize functions that are returned by the useTable hook. Every change will trigger a new fetch. By default, pagination happens on the server side. If you want to do pagination handling on the client side, you can pass the pagination.mode property and set it to "client". Also, you can disable the pagination by setting it to "off". Here is an example of how you can use the useTable hook for pagination:

import React from "react";  
import { useMany, useTable, HttpError } from "@refinedev/core";  
  
interface IPost {  
 id: number;  
 title: string;  
 content: string;  
 status: "published" | "draft" | "rejected";  
 createdAt: string;  
}  
  
const PostList: React.FC = () => {  
 const {  
 tableQueryResult,  
 current,  
 setCurrent,  
 pageSize,  
 setPageSize,  
 pageCount,  
 } = useTable<IPost, HttpError>();  
  
 // Fetches the posts for the current page  
 const posts = tableQueryResult?.data?.data ?? [];  
 // Checks if there is a next page available  
 const hasNext = current < pageCount;  
 // Checks if there is a previous page available  
 const hasPrev = current > 1;  
  
 return (  
 <div>  
 <h1>Posts</h1>  
 <table>  
 <thead>  
 <tr>  
 <th>ID</th>  
 <th>Title</th>  
 <th>Status</th>  
 <th>Created At</th>  
 </tr>  
 </thead>  
 <tbody>  
 {tableQueryResult.data?.data.map((post) => (  
 <tr key={post.id}>  
 <td>{post.id}</td>  
...

import React from "react";  
import { useMany, useTable, HttpError } from "@refinedev/core";  
  
interface IPost {  
 id: number;  
 title: string;  
 content: string;  
 status: "published" | "draft" | "rejected";  
 createdAt: string;  
}  
  
const PostList: React.FC = () => {  
 const {  
 tableQueryResult,  
 current,  
 setCurrent,  
 pageSize,  
 setPageSize,  
 pageCount,  
 } = useTable<IPost, HttpError>();  
  
 // Fetches the posts for the current page  
 const posts = tableQueryResult?.data?.data ?? [];  
 // Checks if there is a next page available  
 const hasNext = current < pageCount;  
 // Checks if there is a previous page available  
 const hasPrev = current > 1;  
  
 return (  
 <div>  
 <h1>Posts</h1>  
 <table>  
 <thead>  
 <tr>  
 <th>ID</th>  
 <th>Title</th>  
 <th>Status</th>  
 <th>Created At</th>  
 </tr>  
 </thead>  
 <tbody>  
 {tableQueryResult.data?.data.map((post) => (  
 <tr key={post.id}>  
 <td>{post.id}</td>  
...

As for the backend API, it should be designed to accept parameters for the current page and the number of records per page, and return the corresponding records. The exact implementation would depend on the specific backend technology and database you are using. For more information, you can refer to the Refine documentation on the useTable hook (https://refine.dev/docs/data/hooks/use-table#pagination). Please note that the backend API should also handle the case where the client-side pagination is used. In this case, the backend should return all records and the client-side code will handle the pagination. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•5mo ago

<@445580191104761857> kapa.ai is still learning and improving, please let us know how it did by reacting below

afraid-scarlet•5mo ago

using simple rest api @kapa.ai using simple rest api

kapa.ai•5mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- When using the Simple REST data provider with Refine, the backend API should be designed to handle pagination parameters. The Simple REST data provider sends HTTP requests to the API with query parameters for pagination, sorting, and filtering. For pagination, the Simple REST data provider sends the page and pageSize parameters in the URL. The page parameter represents the current page number, and the pageSize parameter represents the number of records per page. Here's an example of how the URL might look for a getList request:

<https://api.example.com/resource?page=1&pageSize=10>

<https://api.example.com/resource?page=1&pageSize=10>

In this case, the backend API should return the first page of records, with 10 records per page. The backend API should also return the total number of records in the X-Total-Count header. This is used by Refine to calculate the total number of pages. Here's an example of how the backend API might handle a getList request:

app.get('/resource', (req, res) => {
  const { page, pageSize } = req.query;
  const offset = (page - 1) * pageSize;
  const records = db.get('resource').slice(offset, offset + pageSize);
  const totalCount = db.get('resource').size().value();
  res.set('X-Total-Count', totalCount);
  res.json(records);
});

app.get('/resource', (req, res) => {
  const { page, pageSize } = req.query;
  const offset = (page - 1) * pageSize;
  const records = db.get('resource').slice(offset, offset + pageSize);
  const totalCount = db.get('resource').size().value();
  res.set('X-Total-Count', totalCount);
  res.json(records);
});

In this example, db is a lowdb instance, which is a small local JSON database. This is just an example, and the actual implementation would depend on your specific backend technology and database. For more information, you can refer to the Refine documentation on the Simple REST data provider (https://refine.dev/docs/data/packages/simple-rest). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•5mo ago

<@445580191104761857> kapa.ai is still learning and improving, please let us know how it did by reacting below

afraid-scarlet•5mo ago

@kapa.ai I have changed it but still the front end doesnt paginate

kapa.ai•5mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- If you've set up your backend correctly and you're still having issues with pagination on the frontend, there could be a few reasons why this is happening. Here are a few things you can check: 1. Check your useTable hook: Make sure you're using the useTable hook correctly in your component. The useTable hook should be used with the pagination prop. Here's an example:

const {
    tableProps,
    paginationProps,
    // other returned props
} = useTable({
    resource: "posts",
    columns,
    pagination: {
        defaultCurrent: 1,
        defaultPageSize: 10,
        pageSizeOptions: ["10", "20", "50", "100"],
    },
});

const {
    tableProps,
    paginationProps,
    // other returned props
} = useTable({
    resource: "posts",
    columns,
    pagination: {
        defaultCurrent: 1,
        defaultPageSize: 10,
        pageSizeOptions: ["10", "20", "50", "100"],
    },
});

2. Check your API response: Make sure your API is returning the correct data and headers. The API should return the data for the current page in the response body, and the total count of records in the X-Total-Count header. 3. Check your API request: Look at the network tab in your browser's developer tools to see the request that's being sent to your API. The request should include the page and pageSize parameters in the URL. 4. Check your error messages: If there are any error messages in your browser's console, they could provide a clue as to what's going wrong. If you're still having issues after checking these things, it would be helpful to have more specific information about what's happening. For example, what exactly happens when you try to paginate? Are there any error messages? What does the API request and response look like? For more information, you can refer to the Refine documentation on the useTable hook (https://refine.dev/docs/data/hooks/use-table#pagination) and the Refine documentation on the Simple REST data provider (https://refine.dev/docs/data/packages/simple-rest). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

afraid-scarlet•5mo ago

@kapa.ai Can you give a front end

kapa.ai•5mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- Sure, here's an example of how you can use the useTable hook in a Refine project to create a paginated table. This example assumes you have a resource named "posts".

import { useTable, IResourceComponentsProps, HttpError } from "@pankod/refine";

interface IPost {
    id: string;
    title: string;
    content: string;
}

export const PostList: React.FC<IResourceComponentsProps> = () => {
    const { tableProps, paginationProps } = useTable<IPost, HttpError>({
        resource: "posts",
        columns: [
            {
                title: "Title",
                dataIndex: "title",
                key: "title",
            },
            {
                title: "Content",
                dataIndex: "content",
                key: "content",
            },
        ],
        pagination: {
            defaultPageSize: 10,
            pageSizeOptions: ["10", "20", "50", "100"],
        },
    });

    return (
        <Table {...tableProps} rowKey="id">
            <Table.Column dataIndex="title" title="Title" />
            <Table.Column dataIndex="content" title="Content" />
            <Table.Pagination {...paginationProps} />
        </Table>
    );
};

import { useTable, IResourceComponentsProps, HttpError } from "@pankod/refine";

interface IPost {
    id: string;
    title: string;
    content: string;
}

export const PostList: React.FC<IResourceComponentsProps> = () => {
    const { tableProps, paginationProps } = useTable<IPost, HttpError>({
        resource: "posts",
        columns: [
            {
                title: "Title",
                dataIndex: "title",
                key: "title",
            },
            {
                title: "Content",
                dataIndex: "content",
                key: "content",
            },
        ],
        pagination: {
            defaultPageSize: 10,
            pageSizeOptions: ["10", "20", "50", "100"],
        },
    });

    return (
        <Table {...tableProps} rowKey="id">
            <Table.Column dataIndex="title" title="Title" />
            <Table.Column dataIndex="content" title="Content" />
            <Table.Pagination {...paginationProps} />
        </Table>
    );
};

In this example, useTable is used to create a table for the "posts" resource. The columns prop defines the columns of the table. The pagination prop is used to configure the pagination. The defaultPageSize is the initial page size, and pageSizeOptions are the options for page size that the user can select. The tableProps and paginationProps returned by useTable are spread into the Table and Table.Pagination components to apply the pagination behavior. Please note that this is a basic example and you might need to adjust it according to your needs. For more information, you can refer to the Refine documentation on the useTable hook (https://refine.dev/docs/data/hooks/use-table#pagination). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•5mo ago

<@445580191104761857> kapa.ai is still learning and improving, please let us know how it did by reacting below

afraid-scarlet•5mo ago

@kapa.ai This is the one i use const { tableProps } = useTable({ syncWithLocation: true, pagination: { mode: "server", }, }); return ( <List> <Table {...tableProps} rowKey="_id"> {/* <Table.Column dataIndex="id" title="ID" /> */} <Table.Column dataIndex="clientname" title="Client Name" /> <Table.Column dataIndex="jobname" title="Job Name" /> <Table.Column dataIndex="invoiceno" title="Invoice Number" /> <Table.Column dataIndex="jobstatus" title="Job Status" /> <Table.Column dataIndex="createdAt" title="Created At" render={(value: any) => <DateField value={value} />} /> <Table.Column title="Actions" dataIndex="actions" render={(: any, record: BaseRecord) => ( <Space> <EditButton hideText size="small" recordItemId={record._id} /> <ShowButton hideText size="small" recordItemId={record._id} /> <DeleteButton hideText size="small" recordItemId={record._id} /> </Space> )} /> </Table> </List> ); };

kapa.ai•5mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- Your code seems correct for setting up a server-side paginated table with Refine's useTable hook. The syncWithLocation: true option will synchronize the table's state (including pagination) with the URL. The pagination: { mode: "server" } option indicates that pagination is handled on the server side. If you're still having issues with pagination, here are a few things you can check: 1. Check your API response: Make sure your API is returning the correct data and headers. The API should return the data for the current page in the response body, and the total count of records in the X-Total-Count header. 2. Check your API request: Look at the network tab in your browser's developer tools to see the request that's being sent to your API. The request should include the page and pageSize parameters in the URL. 3. Check your error messages: If there are any error messages in your browser's console, they could provide a clue as to what's going wrong. If you're still having issues after checking these things, it would be helpful to have more specific information about what's happening. For example, what exactly happens when you try to paginate? Are there any error messages? What does the API request and response look like? For more information, you can refer to the Refine documentation on the useTable hook (https://refine.dev/docs/data/hooks/use-table#pagination) and the Refine documentation on the Simple REST data provider (https://refine.dev/docs/data/packages/simple-rest). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•5mo ago

<@445580191104761857> kapa.ai is still learning and improving, please let us know how it did by reacting below

afraid-scarlet•5mo ago

@kapa.ai was there any update recently on useTable it is not using the total-x-count in response headers

kapa.ai•5mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- Refine's useTable hook uses the X-Total-Count header to determine the total number of pages for pagination. This is a standard practice in many REST APIs. If the useTable hook is not recognizing the X-Total-Count header, there could be a few reasons: 1. Check the header name: Make sure the header name is spelled and capitalized correctly as X-Total-Count. 2. Check the header value: The X-Total-Count header should contain the total number of records as a number. Make sure the value is correct and is being sent as a number, not a string. 3. Check your API configuration: Some servers or frameworks may require specific configuration to allow custom headers like X-Total-Count. Make sure your server is configured to allow this header. 4. Check your CORS configuration: If your API is on a different domain, you may need to configure CORS (Cross-Origin Resource Sharing) to allow the X-Total-Count header. The Access-Control-Expose-Headers header can be used to expose the X-Total-Count header to the browser. If you're still having issues, it would be helpful to have more specific information about your API and how you're using the useTable hook. For more information, you can refer to the Refine documentation on the useTable hook (https://refine.dev/docs/data/hooks/use-table#pagination) and the Refine documentation on the Simple REST data provider (https://refine.dev/docs/data/packages/simple-rest). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------