How to implement master-slave synchronization of database in React Query?

How to implement master-slave synchronization of database in React Query?

Introduction:
React Query is a library for managing data, which can make data request, cache, update and other operations in front-end applications more concise and efficient. Since modern applications often need to interact with back-end databases, achieving master-slave synchronization of the database in React Query is a very important feature. This article will introduce how to use React Query to implement master-slave synchronization of the database, and provide detailed code examples.

1. What is the master-slave synchronization of the database?
The master-slave synchronization of the database refers to synchronizing the update operations (insert, update, delete, etc.) of one database to multiple other databases to achieve data replication and redundant storage. The master database is responsible for receiving and processing user write requests, while the slave database is responsible for copying the data of the master database and using it for read operations. This can improve the read and write performance and availability of the database.

2. Use React Query to achieve master-slave synchronization of the database
React Query provides a very flexible data management mechanism that can easily achieve master-slave synchronization of the database. The following are the steps for one implementation:

1. Create Query Client for React Query
   First, we need to create a Query Client in the application. Query Client is responsible for managing data requests, caching and updating operations. You can refer to the following code example:

import { QueryClient, QueryClientProvider } from 'react-query';
const queryClient = new QueryClient();

function App() {
  return (
    <QueryClientProvider client={queryClient}>
      {/* 应用程序代码 */}
    </QueryClientProvider>
  );
}

export default App;

2. Define Hook for database query
   In React Query, we use useQuery Hook to define database query. You can refer to the following code examples:

import { useQuery } from 'react-query';

function useDatabaseQuery() {
  return useQuery('databaseQuery', async () => {
    // 发起数据库查询请求的代码
    // 返回查询结果
  });
}

function MyComponent() {
  const { data, isLoading } = useDatabaseQuery();

  if (isLoading) {
    return <div>Loading...</div>;
  }

  return <div>{data}</div>;
}

3. Implementing master-slave synchronization of data
   Master-slave synchronization of data can be achieved through the invalidateQueries method of React Query. After the master database updates the data, we can call the invalidateQueries method to notify the slave database to requery the data. For specific implementation, please refer to the following code examples:

import { useMutation, useQueryClient } from 'react-query';

function useUpdateData() {
  const queryClient = useQueryClient();

  return useMutation(async (data) => {
    // 发起数据库更新请求的代码
    // 更新数据之后，调用 invalidateQueries 方法
    queryClient.invalidateQueries('databaseQuery');
    // 返回更新后的数据
  });
}

function MyComponent() {
  const { mutate } = useUpdateData();

  const handleUpdateData = async () => {
    // 更新数据的代码
    await mutate(updatedData);
  };

  return <button onClick={handleUpdateData}>Update Data</button>;
}

3. Summary
This article introduces how to use React Query to achieve master-slave synchronization of the database. By creating Query Client, defining Hooks for database queries and calling the invalidateQueries method, we can easily achieve master-slave synchronization of data. I hope this article can help readers better understand and use React Query and improve application performance and usability.

The above is the detailed content of How to implement master-slave synchronization of database in React Query?. For more information, please follow other related articles on the PHP Chinese website!