在server.js代码中,我在开头写了:
var callForecastDatas = require(__dirname+"/config/callForecastDatas.js");
var callForecastAdsl = require(__dirname+"/config/callForecastAdsl.js");
var callForecastCable = require(__dirname+"/config/callForecastCable.js");
var callForecastFibre = require(__dirname+"/config/callForecastFibre.js");
var callForecastOthers = require(__dirname+"/config/callForecastOthers.js");
var callForecastOtt = require(__dirname+"/config/callForecastOtt.js");
var callForecastSatellite = require(__dirname+"/config/callForecastSatellite.js");
var callForecasttnt = require(__dirname+"/config/callForecasttnt.js");
然后,在函数中,我引用其中一个元素:
function getAllDeptsCallForecast(res, queryParams)
{
//some code
var callForecastAdsl = callForecastAdsl.callForecastPerHourAndPerDay;
//some code
}
/config/callForecastAdsl.js文件的结构如下:
module.exports = {
callForecastPerHourAndPerDay:`...some datas...
};
为什么我有这样的错误500(参考函数GetAllDeptsCallForecast中的callForecastAdsl行)?
TypeError: Cannot read property 'callForecastPerHourAndPerDay' of undefined
答案 0 :(得分:3)
你影子变量:
function getAllDeptsCallForecast(res, queryParams)
{
var callForecastAdsl = callForecastAdsl.callForecastPerHourAndPerDay;
// ^^^^--- This is shadowing the imported `callForecastAdsl`
}
这意味着您的callForecastAdsl
中的require
在该函数中不可用,只有其本地callForecastAdsl
变量,最初的值为undefined
。
只需使用其他名称:
function getAllDeptsCallForecast(res, queryParams)
{
var someOtherName = callForecastAdsl.callForecastPerHourAndPerDay;
// ^^^^^^^^^^^^^
}