Meteor creating selection and then find selected state - meteor

Question

I'm new to Meteor and building a demo site to play around with it but noticed an interesting problem. In the code below I'm trying to create a selection box and populate it with years for a user's date of birth. The helper for that seems straight forward. The issue is tying the query of Mongo to it so I can display the selection chosen. What I ended up creating is horrible. Multiple calls to the db and then the isSelected helper runs again and spins over everything needlessly.
Clearly there must be a way to create the selection and at the same time find the selected option in one pass preferably w/o an additional db call. But helper only returns one value. Maybe returning an array with year and selection state? I don't think I've seen that on anything I've read yet but it's early days with Meteor for me still, I know nothing. Anyone have ideas on how to create this with great performance? Thanks
<template name="accountProfile">
{{#with accountDetails}}
Other bits of data using accountDetails here
<li>
{{> userDateOfBirth}}
</li>
{{/with}}
</template>
<template name="userDateOfBirth">
<select name="userDateOfBirthYear">
{{#each displayYears}}
<option value="{{this}}" selected="{{isSelected}}">{{this}}</option>
{{/each}}
</select>
</template>
Template.accountProfile.helpers({
'accountDetails': function(){
var currentUser = Meteor.userId();
var userProfileCreated = User.findOne({ createdBy: currentUser });
return userProfileCreated;
}
});
Template.userDateOfBirth.helpers({
'displayYears': function(){
var listOfYears = [];
var numberOfYearsToList = 120;
for (var i = numberOfYearsToList-1; i >= 0; i--) {
listOfYears[i] = 2015 - i;
};
return listOfYears;
},
'isSelected' : function(){
var currentUser = Meteor.userId();
var userProfileCreated = User.findOne({ createdBy: currentUser });
var numberOfYearsToList = 120;
for (var i = numberOfYearsToList-1; i >= 0; i--) {
console.log(2015 - i + " " + this);
if((this) == moment(new Date(userProfileCreated.dateOfBirth)).format("YYYY")){
return "selected";
}
};
}
});

Answer 1

Since accountDetails already returns the profile of current user, you can access its dateOfBirth even inside displayYears context by using ../ (access parent data context), which helps you to avoid multiple queries to the DB.
<template name="accountProfile">
{{#with accountDetails}}
//- Other bits of data using accountDetails here
<li>
{{> userDateOfBirth}}
</li>
{{/with}}
</template>
<template name="userDateOfBirth">
<select name="userDateOfBirthYear">
{{#each displayYears}}
<option value="{{this}}" selected="{{isSelected ../dateOfBirth}}">{{this}}</option>
{{/each}}
</select>
</template>
Template.userDateOfBirth.helpers({
'isSelected' : function(dateOfBirth) {
if (this == moment(new Date(dateOfBirth)).format("YYYY")) {
return "selected";
}
}
});