How to build an editable table component using Go language and Vue.js

In modern web applications, tables are a frequently used basic component, so being able to build editable table components will provide developers with great convenience. This article will introduce how to build an editable table component using Go language and Vue.js.

1. What is an editable table component

The editable table component is a user interface component that allows users to enter, edit and modify the form. , and also provides some additional functions, such as adding new rows, deleting rows, sorting, filtering, and searching. The editable table component is very useful for both displaying data and data entry processing, and is very suitable for various data display and data management systems.

2. Writing a back-end program using Go language

Before we start building front-end components using Vue.js, we need to first write a back-end program to handle data storage and data Update operation. So, here we will write the backend program using Go language.

First, we need to use the Go language web framework to create a web service. Here we will use the Gin framework to create a simple RESTful API.

(1) Install the Gin framework

Before installing the Gin framework, you need to install the Go language first. Then you can use the following command to install the Gin framework:

go get -u github.com/gin-gonic/gin

(2) Create a new Go file

In the project directory, create a file named main.goGo file and enter the following content:

package main

import (
    "github.com/gin-gonic/gin"
)

func main() {
    r := gin.Default()
    r.GET("/api/tabledata", func(c *gin.Context) {
        // TODO: 返回表格数据
    })
    r.PUT("/api/tabledata", func(c *gin.Context) {
        // TODO: 更新表格数据
    })
    r.Run(":4000")
}

(3) Return table data

In the above code, we created a simple Gin route, which will run in the web service Listen on port 4000. At the same time, we also created two routes for GET and PUT requests respectively, and defined the operations that need to be performed in the routing function. The TODO comment in this routing function indicates that we need to write code to return tabular data.

r.GET("/api/tabledata", func(c *gin.Context) {
    tableData := []map[string]interface{}{
        {"name": "John Doe", "age": 30, "email": "johndoe@example.com"},
        {"name": "Jane Doe", "age": 25, "email": "janedoe@example.com"},
        {"name": "Bob Smith", "age": 45, "email": "bobsmith@example.com"},
    }
    c.JSON(200, gin.H{
        "data": tableData,
    })
})

In the routing function, we define a variable named tableData, which is a variable containing three names including name, age#map type slice of ## and email attributes. We then use the c.JSON method to return that data.

(4) Update table data

We also need to write a piece of code to handle the update operation of table data. Under the TODO comment in the routing function, we will use the following code to achieve this:

r.PUT("/api/tabledata", func(c *gin.Context) {
    var updatedData []map[string]interface{}
    if err := c.BindJSON(&updatedData); err != nil {
        c.JSON(400, gin.H{"error": "Bad request"})
        return
    }
    // TODO: 将更新后的数据保存到数据库或其他存储介质中
    c.Status(204)
})

In this code, we define a new variable

updatedData, which is a variable containing Multiple map type slices. We then use the c.BindJSON method to extract the JSON formatted data from the request and parse it into an updatedData variable.

At the same time, we also need to write a function in TODO to save the updated data to a database or other storage media.

Writing front-end components using Vue.js

Now, we have written a simple web service to handle the storage and update operations of data. Next, we will use Vue.js to write front-end components to provide a user-friendly editable table interface.

(1) Install Vue.js

First, we need to install Vue.js in the project. You can use the following command to install Vue.js:

npm install vue

(2) Create Vue component

Next, we will create a Vue named

EditableTable.vue Component to provide an editable table interface.

<template>
  <div>
    <table>
      <thead>
        <tr>
          <th v-for="(column, key) in tableColumns" :key="key">{{ column }}</th>
        </tr>
      </thead>
      <tbody>
        <tr v-for="(row, rowIndex) in tableData" :key="rowIndex">
          <td v-for="(column, columnIndex) in row" :key="columnIndex">
            <input type="text" v-model="tableData[rowIndex][columnIndex]">
          </td>
          <td>
            <button @click="deleteRow(rowIndex)">Delete</button>
          </td>
        </tr>
      </tbody>
      <tfoot>
        <tr>
          <td colspan="4">
            <button @click="addRow">Add new row</button>
          </td>
        </tr>
      </tfoot>
    </table>
  </div>
</template>

<script>
export default {
  name: "EditableTable",
  props: {
    tableData: Array,
    tableColumns: Array,
  },
  methods: {
    addRow() {
      const newRow = {};
      this.tableColumns.forEach((column) => {
        newRow[column] = "";
      });
      this.tableData.push(newRow);
    },
    deleteRow(rowIndex) {
      this.tableData.splice(rowIndex, 1);
    },
  },
};
</script>

In the Vue component, we first define a table, which contains a header row, data row and a footer row. In the header row, we use the

v-for directive to bind each column of the header to each element in the tableColumns array.

In the data rows, we use another

v-for directive to bind the cells of each row to each element in the tableData array. We also use the v-model directive to bind the value of each cell to the corresponding position in the tableData array.

Finally, in the footer row, we add a button that adds a new row of data by calling the

addRow method and the deleteRow method to delete it data row.

(3) Using Vue component

We have created a Vue component named

EditableTable, and the component can accept two required parameters: tableData and tableColumns. Now, we will reference the EditableTable component in another Vue component and pass the tableData and tableColumns parameters to it.

<template>
  <div>
    <editable-table :table-data="tableData" :table-columns="tableColumns" />
  </div>
</template>

<script>
import EditableTable from "@/components/EditableTable.vue";

export default {
  name: "App",
  components: {
    EditableTable,
  },
  data() {
    return {
      tableData: [],
      tableColumns: [],
    };
  },
  methods: {
    loadData() {
      // TODO: 从Web服务端加载数据
    },
    saveData() {
      // TODO: 将更新后的数据保存到Web服务端
    },
  },
  created() {
    this.loadData();
  },
  beforeDestroy() {
    this.saveData();
  },
};
</script>

In this Vue component, we first introduced the

EditableTable component and registered it in the components option. Then, we define two empty arrays tableData and tableColumns, which will be used to pass data to the EditableTable component.

In the

created hook function, we will use the loadData method to load data from the Web server. In the beforeDestroy hook function, we will use the saveData method to save the updated data to the Web server.

4. 将后端和前端组合起来

我们已经编写了使用Go语言编写的简单Web服务和一个可编辑的Vue组件。现在，我们将将它们组合在一起，以便能够在Web应用程序中使用它们。

(1) 启动后端Web服务

在终端中运行以下命令来启动后端Web服务：

go run main.go

这将会在命令行中输出一些日志，并且Web服务将在端口4000上监听请求。

(2) 使用前端组件

现在，在另一个终端窗口中，运行以下命令来启动前端Web应用程序：

npm run serve

这将会在浏览器中启动一个新的Web应用程序，并加载Vue.js组件。现在，您应该能够浏览可编辑的表格，添加、修改和删除表格数据，并保存更改到后端Web服务。

5. 总结

本文介绍了如何使用Go语言和Vue.js构建可编辑的表格组件。我们首先编写了一个简单的Web服务，以处理数据的存储和更新操作。然后，我们使用Vue.js编写了一个可编辑的表格组件，并将其与后端Web服务组合在一起，以提供一种用户友好的表格界面。这个Vue组件允许用户添加、修改和删除表格数据，并将更改保存到后端Web服务。

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