Model has no method '_configure'

gistfile1.js

Relevant Code:::

var Course = Backbone.Model.extend({
    url : function(){
        var base = 'courses'
        if (this.isNew()) return base;
        return base + (base.charAt(base.length-1) == '/'?'' : '/') + this.id; 
    }
})


App.Controllers.Courses = Backbone.Controller.extend({
    routes : {
        "courses/:id"   : "show",
        ""              : "index"
        //"new"           : "newDoc"
    },
    show : function(id){
        var course = new Course({ id : id})
        course.fetch({
            success: function(){
                App.Views.Show({ model : course});
            }
        })
    }
});



ERROR::::

Uncaught TypeError: Object #<Object> has no method '_configure' and this points to line 9 in this gist.

Solved. I need to add new

    show : function(id){
        var course = new Course({ id : id})
        course.fetch({
            success: function(){
                new App.Views.Show({ model : course});
            }
        })
    }