我正在登錄兩個不同的服務,我需要將兩個響應都推送到一個數組。對於這一點,我創建一個promiseResult
,和裏面,另外兩個承諾對於登錄:NodeJS:承諾內的回調
var promiseResult = new Promise(function(resolveResult, rejectResult) {
var dataAvailable = []
// first promise for the first login
var promiseFirstLogin = new Promise(function(resolve, reject) {
login.returnData(email, password, (dataFirstLogin) => {
resolve(dataFirstLogin)
})
})
promiseFirstLogin.then(function(dataFirstLogin) {
return dataFirstLogin
})
.then(function(dataFirstLogin) {
// pushing the data of the first login
dataAvailable.push({dataFirstLogin: dataFirstLogin})
return dataAvailable
})
// if the user puts the login for the second service
if (second_login_username) {
// second promise of the second login
var promiseSecondLogin = new Promise(function(resolve, reject) {
login.returnSecondData(secondUsername, secondPassword, (secondData) => {
resolve(secondData)
})
})
promiseSecondLogin.then(function(secondData) {
return secondData
})
.then(function(secondData) {
// pushing second data to the same array
dataAvailable.push({secondData: secondData})
return dataAvailable
})
}
// logs undefined (?)
console.log('->', dataAvailable);
/*
I try to resolve the array with my data, but it needs to be inside the promises.
However, as I have multiple data sources, I cannot simply put the resolve function
inside each promise. How to proceed with this?
*/
resolveResult(dataAvailable)
})
promiseResult.then(function (dataAvailable) {
// I try to get the array with my data... but unsuccessfully
return dataAvailable
})
.then(function (dataAvailable) {
dataAvailable.reduce(function(result, item) {
var key = Object.keys(item)[0]
result[key] = item[key];
res.send(JSON.stringify(result, null, 3));
}, {})
})
正如我在評論中寫道,我嘗試resolve()
與來自登錄的數據數組,但它需要在承諾之內。但是,我有多個數據源,並且我不能簡單地將resolve()
放在每個承諾中。如何把一個包含我的服務數據的單個resolve()
?
任何幫助將非常感激。
我不瞭解downvote的原因。請讓我知道如何改善我的問題。 –
你檢查我的答案嗎?這就是你需要做的。 –
是的,我做過 - 我真的很感激它,並贊成它。 –