Take a look at this easy collection:
{_id: "01",
name: "Jimmy",
canDrive: false }
My goal is to manipulate the DOM and display a
<div class="driving-tutorial>canDrive has a value of false, and hide it when the value is true
Here's an example in meteor:
Template.profile.rendered = function() {
if (<query>,<field> == true){
$('.driving-tutorial').hide();
else {
$('.driving-tutorial').show(); }
To incorporate this logic, you have the option to utilize the findOne() function. This function is designed to locate the initial document that matches the specified selector/query object within the arguments. Essentially, by employing findOne() with a Mongo selector, which serves as an object outlining the mandatory attributes of the desired document, you can identify a matching document. For instance, the following selector:
var doc = Model.findOne({ canDrive: false });
would correspond with this particular document:
{
_id: "01",
name: "Jimmy",
canDrive: false
}
Incorporating this approach into your template function allows for the assessment of document existence and field presence. It's important to note that findOne() returns null if it fails to discover a matching document - a common scenario when the document hasn't been loaded or has been eliminated from the collection:
Template.profile.rendered = function() {
var doc = Model.findOne({ canDrive: false });
if (doc && !doc.canDrive){
$('.driving-tutorial').show();
else {
$('.driving-tutorial').hide();
}
}
An alternate method involves utilizing the second version of the jQuery toggle() function, which accepts a Boolean parameter. When this parameter is set to true, the matched elements are displayed; alternatively, setting it to false results in the elements being hidden:
Template.profile.rendered = function() {
var doc = Model.findOne({ canDrive: false }),
canDrive = (doc && !doc.canDrive);
$('.driving-tutorial').toggle(canDrive);
}
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