Example of bad Model layer in angular (written for presentation)

bad-model-layer.js

// Post Model
angular.module('myApp')
    .factory('Post', function($resource) {
        var resource = $resource(
            '/posts/:id',
            {
                id: '@id'
            },
            {
                'store': { method: 'POST' },
                'update': { method:'PUT' },
                'destroy': { method:'DELETE' }
            }
        );

        return resource;
    });

// Comment Model
angular.module('myApp')
    .factory('Comment', function($resource) {
        var resource = $resource(
            '/comments/:postId/posts/:id',
            {
                id: '@id',
                postId: '@postId'
            },
            {
                'store': { method: 'POST' },
                'update': { method:'PUT' },
                'destroy': { method:'DELETE' }
            }
        );

        resource.prototype.isDeletable = function() {
            return this.is_published && !this.deleted_at;
        };

        return resource;
    });

// list posts controller
angular.module('myApp')
    .controller('ListPostsCtrl', function ($scope, Post, posts, user) {
        $scope.posts = posts;
        $scope.newPost = new Post({
            user_id: user.id
        });

        $scope.addPost = function(post) {
            post.$store();
            $scope.posts.push(post);
        };

        $scope.deletePost = function (post) {
            _.remove($scope.posts, {id: post.id});

            if (post.id) {
                post.$destroy();
            }
        };

        $scope.$onRootScope('socket.posts.deleted', function(event, post) {
            _.remove($scope.posts, {id: post.id});
        });
        // ...
    });

// comments controller
angular.module('myApp')
    .controller('PostCommentsCtrl', function ($scope, Post, Comment, post, comments, user) {
        $scope.post = post;
        $scope.comments = comments;
        $scope.newComment = new CommentModel({
            user_id: user.id
        });

        $scope.commentsAllowed = function () {
            return $scope.post.comments_allowed && $scope.post.is_published;
        };

        $scope.hasComments = function () {
            return $scope.commentsAllowed() && this.comments.length;
        };

        $scope.addComment = function (comment) {
            if ($scope.commentsAllowed()) {
                comment.$store();
                this.comments.push(comment);
            }
        };

        $scope.deleteComment = function (comment) {
            // comment is not instance of Comment so we can't call isDeletable
            if (comment.is_published && !comment.deleted_at) {
                _.remove(this.comments, {id: comment.id});

                // we can't call comment.$destroy
                Comment.destroy({}, {'id' : comment.id});
            }
        };

        // ....

    });