React Query Database Plugin: Sample code for advanced data manipulation

React Query Database Plugin: Sample Code for Advanced Data Operations

Introduction:
React Query is a library for processing data that provides powerful Query, data caching and state management functions. By using React Query, data manipulation in React applications is easier and more efficient. This article will introduce the database plugin for React Query and provide some sample code for advanced data operations.

1. Install and configure the React Query database plug-in
Before using the React Query database plug-in, we need to prepare the environment first. First, we need to install React Query and the database plugin. It can be installed with the following command:

npm install react-query
npm install react-query-plugin-database

Next, create a database.js file in the root directory of the project and add the following code:

import { createDatabasePlugin } from 'react-query-plugin-database';

const databasePlugin = createDatabasePlugin({
  // 在这里配置数据库插件的选项
});

export default databasePlugin;

This way, We have completed the installation and configuration of the React Query database plug-in.

2. Sample Code
Next, we will use some sample code to demonstrate the advanced data manipulation functions of the React Query database plug-in.

1. Get data
   Use the useDatabaseQuery hook to easily get data from the database. Here is an example:

   import { useDatabaseQuery } from 'react-query-plugin-database';
   
   const Component = () => {
     const { data, isLoading, isError } = useDatabaseQuery('todos');
   
     if (isLoading) {
    return <div>Loading...</div>;
     }
   
     if (isError) {
    return <div>Error occurred while fetching data</div>;
     }
   
     return (
    <div>
      {data.map((todo) => (
        <div key={todo.id}>{todo.title}</div>
      ))}
    </div>
     );
   };

   In the above example, we get data from the database table named 'todos' and display it on the page.

2. Add data
   Use the useDatabaseMutation hook to easily add data to the database. Here is an example:

   import { useDatabaseMutation } from 'react-query-plugin-database';
   
   const Component = () => {
     const { mutate } = useDatabaseMutation('todos');
   
     const addTodo = (title) => {
    mutate((data) => [
      ...data,
      { id: Date.now(), title }
    ]);
     };
   
     return (
    <div>
      <button onClick={() => addTodo('New Todo')}>Add Todo</button>
    </div>
     );
   };

   In the above example, we add a new todo data by clicking the button.

3. Update data
   Use the useDatabaseMutation hook to easily update data in the database. Here is an example:

   import { useDatabaseMutation } from 'react-query-plugin-database';
   
   const Component = () => {
     const { mutate } = useDatabaseMutation('todos');
   
     const updateTodo = (id, newTitle) => {
    mutate((data) =>
      data.map((todo) => {
        if (todo.id === id) {
          return { ...todo, title: newTitle };
        }
        return todo;
      })
    );
     };
   
     return (
    <div>
      <button onClick={() => updateTodo(1, 'Updated Todo')}>Update Todo</button>
    </div>
     );
   };

   In the above example, we update the title of the todo with id 1 by clicking the button.

4. Delete data
   Use the useDatabaseMutation hook to conveniently delete data in the database. Here is an example:

   import { useDatabaseMutation } from 'react-query-plugin-database';
   
   const Component = () => {
     const { mutate } = useDatabaseMutation('todos');
   
     const deleteTodo = (id) => {
    mutate((data) => data.filter((todo) => todo.id !== id));
     };
   
     return (
    <div>
      <button onClick={() => deleteTodo(1)}>Delete Todo</button>
    </div>
     );
   };

   In the above example, we delete the todo data with id 1 by clicking the button.

   Conclusion:
   Through the introduction of this article, we have learned how to install and configure the React Query database plug-in, and demonstrated some of its advanced data manipulation functions through sample code. The React Query database plug-in is very convenient and efficient in processing data operations, and can greatly improve development efficiency. I hope this article was helpful and guided you to better use the React Query database plugin.

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