db.collection.update() throws 'undefined is not a function' - meteor

Question

I have this server side method (Meteor method) that successfully finds a document by the ID that it is passed, but when I go to issue a mongo .update(), I get an internal server error (500).
setToggle: function(detailId){
var checked_detail = detailsCollection.findOne({_id: detailId});
checked_detail.update({$set: {checkboxStatus: 'toggle'}});
}
Here is where I initially call the method on the client to create the document:
'submit form': function(ev){
ev.preventDefault();
var detailFormData = {
detail: $(ev.target).find('[name = detail]').val(),
parentId: $(ev.target).find('[name = parentId]').val(),
checkboxStatus: ''
}
Meteor.call('addDetail', detailFormData);
}
And here is that server insert method, so you can see the model:
addDetail: function(detailFormData){
if(! Meteor.userId()){
throw new Meteor.Error('not-authorized');
}
detailsCollection.insert({
detail: detailFormData.detail,
parentId: detailFormData.parentId,
checkboxStatus: detailFormData.checkboxStatus
});
}

Answer 1

Your update syntax is wrong : you're retrieving the Mongo document and then trying to call the update operation on the resulting plain JS object instead of calling the method on the collection itself.
Rewrite your code like this :
setToggle: function(detailId){
detailsCollection.update(detailId,{
$set: {checkboxStatus: 'toggle'}
});
}
The Mongo Collection update syntax takes two (mandatory) parameters :
a Mongo selector to identify which documents in the collection should be updated (on the client using minimongo you're only allowed to modify documents by _id).
a Mongo modifier object to specify how the matching documents should be modified.
https://docs.meteor.com/#/full/update