Ghost/ghost/admin/app/routes/editor/edit.js

import AuthenticatedRoute from 'ghost/routes/authenticated';
import base from 'ghost/mixins/editor-base-route';
import isNumber from 'ghost/utils/isNumber';
import isFinite from 'ghost/utils/isFinite';

export default AuthenticatedRoute.extend(base, {
    titleToken: 'Editor',

    beforeModel: function (transition) {
        this.set('_transitionedFromNew', transition.data.fromNew);

        this._super(...arguments);
    },

    model: function (params) {
        var self = this,
            postId,
            query;

        postId = Number(params.post_id);

        if (!isNumber(postId) || !isFinite(postId) || postId % 1 !== 0 || postId <= 0) {
            return this.transitionTo('error404', 'editor/' + params.post_id);
        }

        query = {
            id: postId,
            status: 'all',
            staticPages: 'all'
        };

        return self.store.query('post', query).then(function (records) {
            var post = records.get('firstObject');

            if (post) {
                return post;
            }

            return self.replaceWith('posts.index');
        });
    },

    afterModel: function (post) {
        var self = this;

        return self.get('session.user').then(function (user) {
            if (user.get('isAuthor') && !post.isAuthoredByUser(user)) {
                return self.replaceWith('posts.index');
            }
        });
    },

    setupController: function (controller/*, model */) {
        this._super(...arguments);

        controller.set('shouldFocusEditor', this.get('_transitionedFromNew'));
    },

    actions: {
        authorizationFailed: function () {
            this.send('openModal', 'signin');
        }
    }
});