Node.js 在afterSave中使用承诺
我尝试在云代码中执行以下代码:Node.js 在afterSave中使用承诺,node.js,promise,parse-server,after-save,Node.js,Promise,Parse Server,After Save,我尝试在云代码中执行以下代码: //Code for sending push notifications after an update is created Parse.Cloud.afterSave('AssignmentMod', function(request){ //Only send if the mod is new console.log("MOD SAVED. NOTIFICATIONS CHECK.") if(!request.object.exist
//Code for sending push notifications after an update is created
Parse.Cloud.afterSave('AssignmentMod', function(request){
//Only send if the mod is new
console.log("MOD SAVED. NOTIFICATIONS CHECK.")
if(!request.object.existed()) {
console.log("NEW MOD ADDED. NOTIFICATIONS START.")
var mod = request.object
//Get the users who have these classes
var userType = Parse.Object.extend('User')
var usersQuery = new Parse.Query(userType)
usersQuery.equalTo('currentClasses', mod.get("parentClass"))
//Get the users who removed the assignment
var modsType = Parse.Object.extend('AssignmentMod')
//If if was an assignment and removed at some point
var mods1Query = new Parse.Query(modsType)
mods1Query.notEqualTo("assignment", null)
mods1Query.equalTo("assignment", mod.get("assignment"))
mods1Query.equalTo("type", "remove")
//If it was an assignment mod and was removed at some point
var mods2Query = new Parse.Query(modsType)
mods2Query.notEqualTo("assignmentMod", null)
mods2Query.equalTo("assignmentMod", mod.id)
mods2Query.equalTo("type", "remove")
//Get the remove mods for this particular update
var modsQuery = new Parse.Query.or(mods1Query,mods2Query)
//Run the user and mods queries
Parse.Promise.when(
usersQuery.find(),
modsQuery.find()
).then( function(users, removeMods) {
console.log("QUERY 1 COMPLETE.")
//Get all users that copied this remove mod
var copyType = Parse.Object.extend('ModCopy')
var copyQuery = new Parse.Query(copyType)
copyQuery.containedIn("assignmentMod", removeMods)
copyQuery.find().then(function(copies){
console.log("QUERY 2 COMPLETE.")
var copyUsers = copies.map(function(copy){
return copy.get("user")
})
//Get the devices of users that belong to the class, did not remove the assignment, and have an ios devices
var deviceQuery = new Parse.Query(Parse.Installation)
deviceQuery.equalTo("deviceType", "ios")
deviceQuery.containedIn("user", users)
deviceQuery.notContainedIn("user", copyUsers)
//Send the push notification
console.log("PUSHING NOTIFICATIONS")
Parse.Push.send(
{
where: deviceQuery,
data: {
alert: "You have new updates."
}
},
{userMasterKey: true}
).then(
function(){
console.log("SUCCESSFULLY SEND NOTIFICATIONS.")
},
function(error){
throw "Error sending push notifications:" + error.code + " : " + error.message
console.log("FAILED TO SEND NOTIFICATIONS")
}
)
},
function(reason){
throw "Error: " + reason
print("ERROR: " + reason)
})
},
function(reason){
throw "Error: " + reason
print("ERROR: " + reason)
})
}
})
我可以在我的日志中看到“MOD SAVED.NOTIFICATIONS CHECK.”和“NEW MOD ADDED>NOTIFICATIONS START.”都已注销。但是,在此之后,我没有收到其他日志,也没有发送推送通知。我至少应该看看日志,什么也看不到。解析服务器在afterSave或其他文件中使用承诺是否存在问题?为什么我的代码在达到第一个承诺时似乎停止执行?您的afterSave()
云代码必须以响应结束。success()
或响应。错误(error)
您应该等待所有承诺完成,然后使用以下内容完成代码:
promise.then( function(){
console.log("END of afterSave() " ;
response.success();
}, function(error){
console.error("error in afterSave() " + " : " + error.message);
response.error(JSON.stringify({code: error.code, message: error.message}));
});
这是Heroku主机的一个问题。我还没有找到那个。如果相同的代码托管在AWS或其他托管平台上,则不会发生这些问题。Heroku在其默认设置中使用的某些服务器设置可能需要更改。如果您遇到此问题,并且除了“关闭Heroku主机”之外还有更多的解决方案,请提交答案,我将接受。在第一个
的顶部放置一个console.log。然后查看它是否至少得到了解决there@JaromandaX添加它们。承诺中的日志在我的服务器日志中不可见。我看到的最后一个日志是新的MOD ADDED NOTIFICATIONS开始日志。这是一个afterSave。我在afterSave中没有响应。奇怪的是,我定义了一些afterSave()方法如下:{Parse.Cloud.afterSave(“MyClass”,函数(请求,响应){
并且它正在处理signatureI中的响应我的问题与我目前的问题相同,但是检查文档进行解析,afterSave不包括响应。您的函数可能会自动崩溃,您应该测试添加更多的console.log以尝试定位代码中的错误。我有,请参见上文。它不包含响应r表示失败函数成功。它在这些点之前失败。