mysql - 使用 React.js 和 Express 删除发布到 MySQL 的帖子

Question

我在使用 React 和 MySQL 删除帖子时遇到问题。我没有收到任何错误或警告，但帖子没有被删除，当我控制台记录受影响的行时，它返回 0。

deleteNote = id => {
    // <-- declare id parameter
    axios
      .delete(`http://localhost:5000/delete/${id}`) // <-- remove ;
      .then(() => {
        // Issue GET request after item deleted to get updated list
        // that excludes note of id
        this.getAllNotes()
      })
      .then(res => {
        const allNotes = res.data;
        this.setState({ allNotes });
      })
      .catch(err => {
        console.error(err);
      });
  };

<button
type="button"
className="btn-xs btn-info float-right"
onClick={() => this.props.deleteNote(note.ID)}>
<span>
<i className="fas fa-trash-alt" />
</span>{" "}
Delete
</button>

我在 express 控制台中的删除方法正确地记录了正确的帖子 ID

app.delete("/delete/:id", (req, res) => {
  let { ID } = req.params.id;
  let sql = "DELETE FROM notes WHERE ID= ?";
  console.log("id: ", req.params.id);

  // delete a row with id = req.params.id
  connection.query(sql, [ID], (error, results, fields) => {
    if (error) return console.error(error.message);

    console.log("Deleted Row(s):", results.affectedRows);
  });
});

Answer 1

在我改变了使用参数的方式后它起作用了。有人知道为什么将 ID 作为第二个参数传递不起作用吗？

app.delete("/delete/:id", (req, res) => {
  let { ID } = req.params.id;
  let sql = `DELETE FROM notes WHERE ID = ${req.params.id}`;
  console.log("id: ", req.params.id);

  // delete a row with id = req.params.id
  connection.query(sql, (error, results, fields) => {
    if (error) return console.error(error.message);
    res.status(200).send(results);
    console.log("Deleted Row(s):", results.affectedRows);
  });
});