model: function() {
    var codePostalUser = "50000";
    this.store.find('user', this.get('session.content.user_id')).then(function(response) {
            alert('working');
    	return this.store.find('professional', {code_postal: response.get('codePostal')});

        }, function() {
        	  alert('fail');
    		return this.store.find('professional');

    });
    },