调用mysql模块中不存在的String.config方法（与异步代码相关）

我在项目中遇到一个

TypeError:无法读取未定义的属性“typeCast”

error。事实证明，这个错误是在

mysql

模块的代码中的以下代码片段中抛出的（确切位置是

node\u modules/mysql/lib/Connection.js:187

）：

我的代码中的相关片段如下所示：

async function mcSeekAllItems(connection) {
    const sql = 'SELECT * FROM `books`';
    return util.promisify(connection.query).call(sql)
        .then(
            results => results
        ).catch(
            error => console.log("Error 006 : ", error)
        );
}

由于我不熟悉

mysql

模块的内部结构，我不确定我在这里做错了什么。 我的节点项目的完整源代码位于

在浏览器中请求

books/

URL会触发此错误。 下面是完整的错误消息：

$ node app.js
Serving on port 3000
Error 006 :  TypeError: Cannot read property 'typeCast' of undefined
    at String.query (/Users/ewandelanoy/Teuliou/Sites/Gwerzher_Leoriou/node_modules/mysql/lib/Connection.js:185:34)
    at internal/util.js:278:30
    at new Promise (<anonymous>)
    at String.query (internal/util.js:277:12)
    at Object.mcSeekAllItems [as seekAllItems] (/Users/ewandelanoy/Teuliou/Sites/Gwerzher_Leoriou/models/book.js:83:45)
    at /Users/ewandelanoy/Teuliou/Sites/Gwerzher_Leoriou/app.js:26:34
    at Layer.handle [as handle_request] (/Users/ewandelanoy/Teuliou/Sites/Gwerzher_Leoriou/node_modules/express/lib/router/layer.js:95:5)
    at next (/Users/ewandelanoy/Teuliou/Sites/Gwerzher_Leoriou/node_modules/express/lib/router/route.js:137:13)
    at Route.dispatch (/Users/ewandelanoy/Teuliou/Sites/Gwerzher_Leoriou/node_modules/express/lib/router/route.js:112:3)
    at Layer.handle [as handle_request] (/Users/ewandelanoy/Teuliou/Sites/Gwerzher_Leoriou/node_modules/express/lib/router/layer.js:95:5)

$node app.js
服务于3000端口
错误006:TypeError:无法读取未定义的属性“typeCast”
位于String.query（/Users/ewandelanoy/Teuliou/Sites/Gwerzher\u Leoriou/node\u modules/mysql/lib/Connection.js:185:34）
在internal/util.js:278:30
在新的承诺（）
位于String.query（internal/util.js:277:12）
在Object.mcSeekAllItems[作为seekAllItems]（/Users/ewandelanoy/Teuliou/Sites/Gwerzher\u Leoriou/models/book.js:83:45）
at/Users/ewandelanoy/Teuliou/Sites/Gwerzher\u Leoriou/app.js:26:34
在Layer.handle[作为handle\u请求]（/Users/ewandelanoy/Teuliou/Sites/Gwerzher\u Leoriou/node\u modules/express/lib/router/Layer.js:95:5）
接下来（/Users/ewandelanoy/Teuliou/Sites/Gwerzher\u Leoriou/node\u modules/express/lib/router/route.js:137:13）
在Route.dispatch（/Users/ewandelanoy/Teuliou/Sites/Gwerzher\u Leoriou/node\u modules/express/lib/router/Route.js:112:3）
在Layer.handle[作为handle\u请求]（/Users/ewandelanoy/Teuliou/Sites/Gwerzher\u Leoriou/node\u modules/express/lib/router/Layer.js:95:5）

$ node app.js
Serving on port 3000
Error 006 :  TypeError: Cannot read property 'typeCast' of undefined
    at String.query (/Users/ewandelanoy/Teuliou/Sites/Gwerzher_Leoriou/node_modules/mysql/lib/Connection.js:185:34)
    at internal/util.js:278:30
    at new Promise (<anonymous>)
    at String.query (internal/util.js:277:12)
    at Object.mcSeekAllItems [as seekAllItems] (/Users/ewandelanoy/Teuliou/Sites/Gwerzher_Leoriou/models/book.js:83:45)
    at /Users/ewandelanoy/Teuliou/Sites/Gwerzher_Leoriou/app.js:26:34
    at Layer.handle [as handle_request] (/Users/ewandelanoy/Teuliou/Sites/Gwerzher_Leoriou/node_modules/express/lib/router/layer.js:95:5)
    at next (/Users/ewandelanoy/Teuliou/Sites/Gwerzher_Leoriou/node_modules/express/lib/router/route.js:137:13)
    at Route.dispatch (/Users/ewandelanoy/Teuliou/Sites/Gwerzher_Leoriou/node_modules/express/lib/router/route.js:112:3)
    at Layer.handle [as handle_request] (/Users/ewandelanoy/Teuliou/Sites/Gwerzher_Leoriou/node_modules/express/lib/router/layer.js:95:5)