I've been trying to debug a chunk of code for some hours now, banging my head against the wall, and finally pinpointed my issues to a place in the code where assigning the results of a collection.findOne() call to a variable is giving me different data than what I see with a console.log() of the same findOne() on the previous line.
prePostState = function(thisStID) {
console.log(Students.findOne({_id:thisStID}));
var stTemp = Students.findOne({_id:thisStID});
console.log(stTmp);
var testsTemp = stTmp.tests;
The collection object has a 'tests' array. In this instance, the array contains 3 objects as its elements.
While both the console.log() lines return something like this
Object {_id: "eXf9dqQbaemKS24Ti", name: "Student,Name", group: "none", site: "SiteName", tests: Array[3]}
Expanding each shows different data. The first one shows the correct tests: Array[3], the second one shows tests: Array[1], and the single element in that array also has data that is different from the matching element in the full array.
----Update----
Doing some further testing, I've changed the code a bit.
prePostState = function(thisStID) {
console.log(Students.find({_id:thisStID}).fetch()); //1
var stTmp = Students.find({_id:thisStID}).fetch();
console.log(stTmp); //2
console.log(stTmp[0].tests.length); //3
for(var i = 0; i < stTmp[0].tests.length; i++) {
console.log(stTmp[0].tests[i]); //4
}
1 Returns:
[Object]
0: Object
_id: "AqLHB8hT8GxzQ7zyD"
group: "none"
name: "Student,Name"
site: "SiteName"
tests: Array[3]
2 Returns:
[Object]
0: Object
_id: "AqLHB8hT8GxzQ7zyD"
group: "none"
name: "Student,Name"
site: "SiteName"
tests: Array[1]
3 Returns:
3
The for loop at 4 repeats three times and prints out each of the three objects in the tests array.
Obviously this means I can access the data I need. Instead of
var testArray = stTmp.tests;
Which leaves me with an array with only a single element, I will just have to get the length of stTmp.tests, and then use a for loop to access each element by index and insert them into the testArray variable.
So I can continue on, but I still don't understand the behavior I'm seeing. I'm on a bit of a timeline to keep making progress at this point, but when I have some time I may revisit this and try and replicate it in a meteorpad or other form that I can share the full code with.
