rails
In Rails, you can define a model as polymorphic like the following: class Post has_many :comments, as: :commentable end class NewsItem has_many :comments, as: :commentable end class Comment belongs_to :commentable, polymorphic: true end And I believe your resources would look like this: resources :posts resources :comments end
rails
In this post, I am going to show you how to make use of serialize option in Ruby on Rails so that you can store information in your database more efficiently. First of all, have you ever been in a situation which you want to store an array or a
html
When working with elements in jQuery, you might need to get width/height of certain invisible DOM elements. By default, jQuery would return 0 in this case because it can not calculate the actual height() of that element. In order to solve this problem, I take advantage of jquery.actual
rails
In this post, I am going to show you how to create a long polling server with Puma, ActionController::Live in Rails 4 and Server Side Events in modern browsers. Why there is another post when there are already many of them on the Internet? It is just because I
troubleshooting
Today, when trying to install wkhtmltopdf package to my Mac via brew, I got the following error: Error: No available formula for wkhtmltopdf I have searched on the Internet and realized that this package was removed from brew. But you still can install it via homebrew-boneyard - Archive of formula
deployment
AWS provides ElasticBeanstalk (EB) as a quick and easy way to deploy your RoR application through a tool called EB Command Line Tool (http://aws.amazon.com/code/6752709412171743). When using with EB Tool, you would need to have AWS Access Key ID and AWS Secret Key. These keys would
git
Note: I only refer to Github in this post but this method can be applied to any Git servers (such as Bitbucket, Heroku, etc) If you work with Github for a while, you would realize that there are two kinds of links for you to work the Git repos: HTTPS