How to get form data from ember checkboxes - checkbox

Question

I have an ember application with two models, user and subject. Each user has a number of subjects associated with them. I have a user/create template in which you can input a new users details, ie their name, email address and associated subjects. The subjects are selected from a list of checkbox values, driven by the subjects in the subject controller. My problem is that when I click on save, the controller seems to skip over the subject selection and doesn't add them to the JSON payload. Can anyone help?
Create Template:
<script type = "text/x-handlebars" id = "user/create">
<div class="modal fade" id="createModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
<h4 class="modal-title">New User</h4>
</div>
<div class="modal-body">
<div class = "input-group">
<form>
<h5>First Name</h5>
{{input value=firstName}}
<h5>Last Name</h5>
{{input value=lastName}}
<h5>Email</h5>
{{input value=email}}
<h5>Subjects</h5>
{{#each subject in subjects}}
<label>
{{view Ember.Checkbox Binding="id"}}
{{subject.name}}
</label><br />
{{/each}}
</form>
</div>
</div>
<div class="modal-footer">
<a {{action close target="view"}} href="#" class="btn btn-default">Cancel</a>
<a data-dismiss="modal" {{action "save"}} class="btn btn-primary">Save changes</a>
</div>
</div><!-- /.modal-content -->
</div><!-- /.modal-dialog -->
</script>
UserCreateView:
App.UserCreateView = Ember.View.extend({
didInsertElement:function(){
$('#createModal').modal('show');
var self = this;
$('#createModal').on('hidden.bs.modal', function (e) {
self.controller.transitionToRoute("users");
});
},
actions:{
close:function(){
this.$(".close").click();
},
save: function(){
alert('(in view) saved in view');
this.controller.send("save");
self.controller.transitionToRoute("users");
this.$(".close").click();
$('#createModal').modal('hide');
}
},
)};
CreateController:
App.UsersCreateController = Ember.ObjectController.extend({
subjects: function() {
return this.store.find('subject');
}.property(),
actions: {
save: function(){
alert('(UsersCreateController) SENDING A POST REQUEST');
var newUser = this.store.createRecord('user', this.get('model'));
console.log("newUser", newUser);
newUser.save();
this.transitionToRoute('users');
$('#createModal').modal('hide');
}
}
});

Answer 1

The first thing I would look at is the binding attribute you are using on your checkbox(es). For non-checkbox or {{input}} you bind via the value attribute. BUT - for checkboxes you must bind on the "checked" attribute.
Take a look at http://emberjs.com/guides/templates/input-helpers/ - about halfway down under Checkboxes for more info, it will show the accepted attributes, etc.
I experienced the same issue wherein this:
{{input type="checkbox" class="input-small" id="inputCache" value=cache}}
did not work with regard to passing in the checkbox-values to the action handling the submit (other values were passed in and persisted fine), whereas simply changing the attribute to this:
{{input type="checkbox" class="input-small" id="inputCache" checked=cache}}
solved the entire problem.
Hopefully this will do the trick. Good luck :-)