Let's talk about fuzzy query of Vue background management project

With the continuous development of the Internet, more and more enterprises have begun to pay attention to information construction, and the backend management system is an indispensable part of enterprise information construction. As an excellent front-end framework, Vue is also widely used in back-end management systems. In the background management system, fuzzy query is a very common requirement. Let's introduce the implementation method of fuzzy query in the Vue background management project.

1. Introduction to the vue project

Vue is an open source JavaScript framework for building user interfaces. Vue's core library only focuses on the view layer and is very easy to learn. Vue can also be integrated into existing projects and new applications built using single-file components. Vue's Chinese documentation is detailed and easy to understand, and its community support is also very good. It is a very excellent front-end framework.

2. Implementation method of fuzzy query

In the Vue background management project, fuzzy query can be implemented by combining the front-end and back-end.

1. Front-end implementation

In the front-end, the keywords entered by the user can be obtained through the input box, and then fuzzy queries can be performed through these keywords.

First, add an input box in the Vue component:

<template>
   <div>
       <input type="text" v-model="keyword" placeholder="请输入关键字" />
       <button @click="handleSearch">搜索</button>
   </div>
 </template>

Among them, the v-model directive is used to implement two-way binding. When the user inputs, the value of the keyword will also change. The @click directive is used to bind click events. When the user clicks the search button, the handleSearch method will be triggered.

Next, implement the handleSearch method:

methods: {
   handleSearch() {
       axios.get("/api/search", {
           params: {
               keyword: this.keyword
           }
       }).then(res => {
           //......
       }).catch(error => {
           console.log(error);
       });
   }
}

In this code, the background interface is requested through axios, and the keywords entered by the user are passed as parameters to the background. The background uses this keyword to perform fuzzy queries and returns the query results to the front end. The front end can perform corresponding data display operations based on the returned data.

2. Backend implementation

In the backend, database operations can be easily performed by using the ORM framework. Here we take Sequelize in Node.js as an example.

First, define a model (Model):

const sequelize = require("../db"); //sequelize实例
const { DataTypes } = require("sequelize");

const User = sequelize.define("User", {
   name: {
       type: DataTypes.STRING
   },
   age: {
       type: DataTypes.INTEGER
   }
});

Among them, sequelize is a Sequelize instance, and DataTypes is used to define the data type.

Next, define the fuzzy query interface:

router.get("/search", async (req, res) => {
   const { keyword } = req.query;
   const users = await User.findAll({
       where: {
           name: {
               [Op.like]: `%${keyword}%`
           }
       }
   });
   res.json(users);
});

Here, Sequelize’s findAll method is used to facilitate query operations. Among them, [Op.like] represents fuzzy query, and % is used to represent wildcards, which can match any character.

3. Summary

Through the above introduction, it can be seen that the implementation of fuzzy query for Vue background management projects is very simple. This function can be easily realized by combining the front-end and back-end. In actual development, we also need to pay attention to issues such as security and query efficiency to achieve better user experience and application performance.

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