如何将req.body与更新查询匹配？ [已关闭]

Question

POST

req.body

的内容是动态的（未选中的复选框不会被发送）。 SQL 更新和插入查询是硬编码的，尽管带有占位符。我要么必须填充

req.body

以匹配我的硬编码查询，要么从

req.body

:

动态创建查询

<script>
let sql = "UPDATE table SET ";
let data = {};
for (let [key, value] of Object.entries(req.body)) {
    if (key != 'id' && key != 'submit') {
        sql += "$" + key + "=? ,";
    }
}
sql += " WHERE $id=" + req.body.id;

for (let [key, value] of Object.entries(req.body)) {
    if (key != 'id' && key != 'submit') {
        let newKey = "$" + key;
        data.newKey = value;
    }

}
</script>

什么是最好的，重建我的数据以匹配查询或构建查询以匹配我的数据？

Answer 1

您可以安装查询生成器。

1. 安装

npm install express knex sqlite3

2. 申请

const express = require('express');
const knex = require('knex');
const bodyParser = require('body-parser');

const app = express();
app.use(bodyParser.json());

const db = knex({
  client: 'sqlite3',
  connection: {
    filename: './data.sqlite3'
  },
  useNullAsDefault: true
});

app.put('/update', (req, res) => {
  const data = req.body;
  const id = data.id;
  delete data.id;
  delete data.submit;

  db('table')
    .where('id', id)
    .update(data)
    .then(() => {
      res.status(200).json({ message: 'Successful!' });
    })
    .catch(error => {
      res.status(500).json({ message: 'Failed', error });
    });
});

const PORT = process.env.PORT || 3000;
app.listen(PORT, () => {
  console.log(`Server running on ${PORT}`);
});