Question

我想用帖子中的数据更新帖子，因为用户不必填写所有字段。例：我在表中有3列（id，内容，位置）。如果用户只想更改内容，则位置不应更改。

app.put("/posts", (req, res) => {
  let body = req.body; // user filled id(because knows what posts he want to edit) and content, location leave empty
//So i want select for give data about location
let postsSql = "SELECT * FROM Posts";
let updateSql = "SET @id = ?;SET @content = ?;SET @location = ?;UPDATE Posts SET content = @content ,location = @location  WHERE id = @id";
  mysqlConnection.query(postsSql, body.id, (error, postsResult) => {
      posts = postsResult[1][0];
    });
let values = [
   body.id,
   body.content || posts.content,
   body.location || posts.location
]
mysqlConnection.query(updateSql, values, (err, result) => {
 if (!err) res.send("Updated");
}

我感觉自己做错了，如何以最佳方式做到这一点

NodeJS 2根据此放置请求请求查询SELECT和UPDATE

0 个答案: