我遇到問題。 我必須做兩個不同的SOAP調用才能檢索兩張憑單列表,然後使用這些列表對它們進行檢查並完成一些工作。 我把兩個調用放在不同的Promise函數中,因爲我想在調用返回結果後在列表中啓動作業。 這是第一個承諾呼叫:Promises和函數之間傳遞變量
let vouchers = function(voucherTypeList){
return new Promise(function(resolve,reject){
const categoryId = "1000";
let args = {
"tns:CategoryId": categoryId
};
var header = {
"tns:Authenticate": {
"tns:UserName": soapVoucherWsdlUsername,
"tns:Password": soapVoucherWsdlPassword
}
};
// let voucherTypeList;
voucherClient.addSoapHeader(header);
voucherClient.GetVouchers(args, function(err, result) {
console.log("DENTRO GET VOUCHERS");
if (err) {
console.log(err);
writeResponse(res, '200', err);
} else {
//++++++++++++++++++++++
//voucherTypeList is what I want to return to the main function
voucherTypeList = mapGetVoucherTypeListResponse(result);
//++++++++++++++++++++++
}
resolve("done 1");
});
});
}
這是第二個承諾電話:
let issuedVouchers = function(accountId) {
return new Promise(function (resolve, reject) {
const categoryId = "1000";
let args = {
"tns:CategoryId": categoryId,
"tns:CheckRedeem": true,
"tns:IncludeRedeemed": false,
"tns:CardId": accountId
};
var header = {
"tns:Authenticate": {
"tns:UserName": soapVoucherWsdlUsername,
"tns:Password": soapVoucherWsdlPassword
}
};
let issuedVoucherList;
voucherClient.addSoapHeader(header);
voucherClient.GetVouchers(args, function (err, result) {
console.log("DENTRO GET ISSUED VOUCHERS");
if (err) {
console.log(err);
writeResponse(res, '200', err);
} else {
//++++++++++++++++++++++
//issuedTypeList is what I want to return to the main function
issuedTypeList = mapGetVoucherTypeListResponse(result);
//++++++++++++++++++++++
}
resolve("done 2");
});
});
}
這是主要功能,與無極流量:
function getAvailableVoucherTypes(req, res) {
var accountId = req.params.accountId;
vouchers(voucherTypeList).
then(issuedVouchers(accountId)).
then(function() {
//here I want to use voucherTypeList and issuedTypeList
//and do some jobs on them
console.log("OK");
});
}
哪有我這樣做?我嘗試了很多解決方案,但我無法在主函數中看到voucherTypeList和發佈的TypeList。
解決方法是有原因的...無論你傳遞給解決方案將傳遞給當時的回調。 – Salketer