In Parse server get() method causes crash - parse-platform

Question

I have a find query with include to get pointer data. It's working fine but if the pointer object does not exist then server crashes.
Here is my query:
var repliesQuery = new Parse.Query("Reply");
repliesQuery.include("author");
repliesQuery.find({
useMasterKey: true
}).then(function(foundMessages) {
var results = [];
for (var i = 0; i < foundMessages.length; i++) {
var rp = {};
rp.title = foundMessages[i].get("title");
rp.description = foundMessages[i].get("description");
var author = foundMessages[i].get("author");
rp.authorId = author.id;
results.push(rp);
}
promise.resolve(results);
});
Everything works fine when the author exists, but if it does not exist then the server crashes.
I tried to add this:
if (author.hasOwnProperty('id')) {
rp.authorId = author.id;
}
But still the issue is not resolved.
Is there any way we can fix this issue?

Answer 1

It's most likely because you're accessing a property of an undefined object, in this case author, in line
rp.authorId = author.id
Like Davi suggests, include a check if author exists.
var repliesQuery = new Parse.Query("Reply");
repliesQuery.include("author");
repliesQuery.find({
useMasterKey: true
}).then(function(foundMessages) {
var results = [];
for (var i = 0; i < foundMessages.length; i++) {
var rp = {};
rp.title = foundMessages[i].get("title");
rp.description = foundMessages[i].get("description");
var author = foundMessages[i].get("author");
if (author) {
rp.authorId = author.id;
}
results.push(rp);
}
promise.resolve(results);
});
Your check
if (author.hasOwnProperty('id')) {
rp.authorId = author.id;
}
also accesses a property of author, so again it would throw an error if author is undefined.