Canjs 3.2.1 can-compute map binding... migrating from Canjs 2.*

In Canjs 2.*, because I used the self.attr( ‘task_group.task_group_link_support_user’ ); The template would rerender availableUsers when the task_group.task_group_link_support_user had changed.

availableUsers: can.compute(function( viewModel ){
                var self = this;
                if( viewModel ) {
                    self = viewModel;
                }
                self.attr( 'task_group.task_group_link_support_user' );
                return self.attr( 'users.list' ).filter(function( item, index ){
                    var found = false;
                    this.task_group.task_group_link_support_user.each( function( item2, index2 ){
                        if( item2.user_id == item.id ) {
                            found = true;
                            return false;
                        }
                    });
                    return !found;
                }.bind( self ));
            }),

I cannot get this to work in Canjs 3.2.1 by doing self.task_group.task_group_link_support_user.get();

availableUsers: Compute(function( ){
        var self = new TaskGroupSupportUserViewModel;
        self.task_group.task_group_link_support_user.get();
        return self.users.list.filter(function( item, index ){
            var found = false;
            this.task_group.task_group_link_support_user.forEach( function( item2, index2 ){
                if( item2.user_id == item.id ) {
                    found = true;
                    return false;
                }
            });
            return !found;
        }.bind( self ));
    }),

The template

<select class="form-control" ($change)="selectUser( %context, %element, %event )">
                    <option value="">Select...</option>
                    {{#each availableUsers}}
                        <option value="{{id}}" data-index="{{@index}}">{{name}}</option>
                    {{/each}}
                </select>

Thanks in advance!

So the problem was that I had to instead of passing Compute.

    availableUsers: {
        get: function(){
            this.task_group.task_group_link_support_user;
            return this.users.list.filter(function( item, index ){
                var found = false;
                this.task_group.task_group_link_support_user.forEach( function( item2, index2 ){
                    if( item2.user_id == item.id ) {
                        found = true;
                        return false;
                    }
                });
                return !found;
            }.bind( this ));
        }
    },

Thank you, Kevin Phillips for helping me out on chat!