为什么即使我在 POSTMAN 中插入数据，我的数据库仍显示未定义? [英] Why my database displays undefined even I inserted data in POSTMAN?

问题描述

下面是我在 ExpressJS 中的 MYSQL 中插入数据的代码.

Below is my code for inserting data in MYSQL in ExpressJS.

router.post('/user', function (req, res) {
        let sql = "INSERT INTO Member (id, Memb_ID, First_Name, Middle_Name, Last_Name, Address, url) VALUES (null, '" + req.body.Memb_ID + "',  '" + req.body.First_Name + "', '" + req.body.Middle_Name + "', '" + req.body.Last_Name + "', '" + req.body.Address + "', '" + req.body.url + "')";

        myDB.query(sql, function (err, results) {
            if (err) throw err;
            res.send({
                Success: "Data inserted."
            })

        });
    });

它在我的数据库中插入数据，但我的数据库看起来像这样

It inserts data in my database but my database looks like this

我不知道为什么会这样输出.这是我的 JSON

I don't know why it outputs like that. Here's my JSON

编辑:这是我的 MYSQL 表

EDIT : Here is my MYSQL Table

推荐答案

你能确定下面的都做完了吗?

Can you make sure that the following is done?

1. 请求中的 content-type 标头必须是 application/json

使用 body-parser(或类似库)来解析 JSON 负载 -> 您可以打印 req.body 来验证这一点.

Use body-parser (or similar libraries) to parse JSON payloads -> You can print the req.body to validate this.

如果您可以确认这些值是可访问的，我会建议转义查询值，如 https://github.com/mysqljs/mysql#escaping-query-values(或在您使用的任何 mysql 库中)——尤其是因为它是一个 DML 查询.

If you can confirm that the values are accessible, I would suggest escaping query values as mentioned in https://github.com/mysqljs/mysql#escaping-query-values (or in any mysql library that you use) - especially since it is a DML query.

(我还假设查询中使用的字段名与数据库中的字段名匹配，并且数据类型正确.)

(Also I assume that the fieldnames used in the query match with the ones in the database and are of the right datatype.)

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