将参数发送到 Rest API 用于 SQL 服务器

Question

我已经创建了一个 SQL 服务器，其中一个表在我可以本地访问的服务器上包含数据。 我还在同一台服务器上创建了一个“API”来从 SQL 服务器获取信息，以便我的 angular 应用程序可以读取它。

At the moment, I can read the rows in the SQL server and have them displayed in my angular application, but, I want to be able to update the SQL table from my angular app (through the API).

这是我的 API ( sqlserver.js )：

var express = require('express');
var app = express();
var cors = require('cors');

app.use(cors())

app.get('/', function (req, res) {

    var sql = require("msnodesqlv8");

    // config for your database
    var config = "server=servername;Database=dataBaseName;Trusted_Connection=Yes;Driver={SQL Server Native Client 11.0}"
    const query = "SELECT * FROM tableName";
    // connect to your database

    sql.query(config, query, (err, rows) => {
        res.send(rows)
     });
});


var server = app.listen(3097, function () {
    console.log('Server is running..');
});

我希望能够使用查询

const query = "SELECT * from tableName WHERE ID LIKE <inputFromAngular>"

但我不确定如何将参数从 angular 获取到sqlserver.js中。 （如果我能做到这一点，那么它将导致使用SET更新 SQL 表

在我的 angular 应用程序中，这就是我调用sqlserver.js以显示 SQL 表的方式：

import { HttpClient } from '@angular/common/http';

constructor(
    private httpService: HttpClient
    ) { }


this.httpService.get("http://servername:3097").subscribe(response => {
        console.log(response)
        this.sqlData = response;
      })

我尝试过使用this.httpService.post()但我不确定如何获取 API 中的参数？

Answer 1

您将需要更改获取方法以从 ui 端发送参数并在后端获取参数，因此添加一个服务器端方法，例如

app.get('/:id', function (req, res) {

    var sql = require("msnodesqlv8");
 var id = req.params.id,
    // config for your database
    var config = "server=servername;Database=dataBaseName;Trusted_Connection=Yes;Driver={SQL Server Native Client 11.0}"
    const query = "SELECT * FROM tableName WHERE ID LIKE "+id;
    // connect to your database

    sql.query(config, query, (err, rows) => {
        res.send(rows)
     });
});

然后在 angular 侧

this.httpService.get("http://servername:3097/"+yourid).subscribe(response => {
        console.log(response)
        this.sqlData = response;
      })

Also I would suggest you to create a root like /yourapiname/:id instead of /:id and url on angular side should be " http://servername:3097/yourapiname "+yourid because your current root can result to confliction.