I am creating an iOS app and I am using Parse for my backend. The app essentially enables people to challenge friends to sleep more than x hours.
I am writing my processing function ("betWinner3") that should compute the winner of the bet/challenge. The details are: I am querying for a bet based on an objectId and I am comparing "betTime" and "hoursSlept".From this query, I also record the username under "better" and the username under "sleeper".If - else statements compute the three possible scenarios. Within each condition/scenario , I make two other queries to "User" class to update the points for the "better" and "sleeper".
When I run the code, my function runs successfully and it gets in the if-else statements but it does not wait for my two other queries to spit out their result.
Any help to solve the problem would be appreciated. I new to Javascript and Parse. Thanks
Code :
Parse.Cloud.define("betWinner3", function(request,response){
var objectId=request.params.objectId;
var query=new Parse.Query("betClass");
query.equalTo("objectId",objectId);
query.first({
success:function(bet){
var better=bet.get("better");
var sleeper=bet.get("sleeper");
console.log('start!!!');
if (parseInt(bet.get("betTime")) < parseInt(bet.get("hoursSlept"))){
console.log('sleeper wins');
var queryUser= new Parse.Query(Parse.User);
queryUser.equalTo("username",better);
queryUser.first({
sucess:function(user){
var userPoints=parseInt(user.get("points"));
userPoints ++;
userBetPoints=userPoints.toString();
user.set("points",userBetPoints);
console.log("111111111111");
user.save();
response.success("Success Message");
},
error:function(error){
response.error("Error Message");
}
});
console.log('sle');
var queryUser= new Parse.Query(Parse.User);
queryUser.equalTo("username",sleeper);
queryUser.first({
sucess:function(user){
var userPoints=parseInt(user.get("points"));
userPoints ++;
userBetPoints=userPoints.toString();
user.set("points",userBetPoints);
console.log("22222222222");
user.save();
response.success("Success Message");
},
error:function(error){
response.error("Error Message");
}
});
}
else if (parseInt(bet.get("betTime")) === parseInt(bet.get("hoursSlept"))){
console.log('tiessssss');
var queryUser= new Parse.Query(Parse.User);
queryUser.equalTo("username",better);
queryUser.first({
sucess:function(user){
var userPoints=parseInt(user.get("points"));
userPoints ++;
userBetPoints=userPoints.toString();
user.set("points",userBetPoints);
console.log("333333333333");
user.save();
response.success("Success Message");
},
error:function(error){
response.error("Error Message");
}
});
console.log("lol");
var queryUser= new Parse.Query(Parse.User);
queryUser.equalTo("username",sleeper);
queryUser.first({
sucess:function(user){
var userPoints=parseInt(user.get("points"));
userPoints +=0;
userBetPoints=userPoints.toString();
user.set("points",userBetPoints);
console.log("4444444");
user.save();
response.success("Success Message");
},
error:function(error){
response.error("Error Message");
}
});
}
else {
console.log("better wins");
var queryUser= new Parse.Query(Parse.User);
queryUser.equalTo("username",better);
console.log("You are in");
queryUser.first({
sucess:function(user){
var userPoints=parseInt(user.get("points"));
userPoints +=2;
userBetPoints=userPoints.toString();
user.set("points",userBetPoints);
console.log("55555555");
user.save();
console.log("aaaaaaa");
response.success("Success Message");
},
error:function(error){
response.error("Error Message");
}
});
var u=0;
for(i=0; i<1000000;i++){
u=i;
}
console.log("lmfao");
var queryUser= new Parse.Query(Parse.User);
queryUser.equalTo("username",sleeper);
queryUser.first({
sucess:function(user){
var userPoints=parseInt(user.get("points"));
userPoints --;
userBetPoints=userPoints.toString();
user.set("points",userBetPoints);
console.log("6666666");
user.save();
console.log("bbbbbbbb");
response.success("Success Message");
},
error:function(error){
response.error("Error Message");
}
});
}
console.log("wiiiiiiiiiiiiiii");
response.success("Success Message %%%%%%%");
},
error:function(error){
response.error("Error Message");
}
});
});
The problem is that the response.success() is getting called before your nested queries complete.
Specifically, these lines get called as soon as your first query returns.
console.log("wiiiiiiiiiiiiiii");
response.success("Success Message %%%%%%%");
As soon as success is called, the function ends. You can fix this by moving the success calls to exclusively within the nested queries. Or better yet, take a look at how Parse has implemented Promises They can really help organize your code.