rails
One of the amazing features you want to build in your application is the ability to deliver content to users in real-time without requiring them to refresh the browsers. You can achieve this by sending requests in fixed interval to the server to get changes or you can have a
rails
Last week, I was helping my friend solve an annoying issue in AuthLogic which took me and my colleagues few hours to figure out the solution. And I would like to share it here so that you can avoid this issue in the future and save your day. We were
rails
After your Rails application is deployed to server, there would be tons of things could happen to your app which you have never expected when running the app in your local environment. In that case, you definitely want to have a tool to support you monitoring the application and quickly
troubleshooting
Few days ago, I got a request from my customer to make changes to PDF exporting feature which involve putting watermark inside PDF file. The existing setup in the project was like this: all necessary information are presented in HTML file and then this HTML file is converted into PDF
rails
I have been setting up many servers for several clients using the combination of Nginx + Passenger or Nginx + Unicorn. And one of the most common issues I see when installing and configuring Nginx is 403 Forbidden error. And in this post, I am going to point out several reasons and
rails
ElasticBeanstalk could be an easy tool for you to deploy your Ruby on Rails application. But if you want to customize your application further, it is not easy at all. In this post, I am going to show how you can run several common processes when deploying your application. First,
git
One of common mistakes I see with new (and some experienced) Ruby on Rails programmers is that they do not commit Gemfile.lock and schema.rb very often to source control version such as Git or SVN. I personally think that it is generally bad practices and we should commit
rails
Update If you are having this issue with CloudFront and you have access to Nginx or Apache server, you should read this post: Correct configuration to fix CORS issue with CloudFront When using custom fonts such as FontAwesome or Glyphicon, you might realize that some icons disappear on Firefox (or
rails
One of the most popular programs to convert HTML to PDF is wkhtmltopdf. And in this post, I am going to show you how to use wicked_pdf gem to quickly export your views into PDF using this program. First, you would need to install wkhtmltopdf program in your platform
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
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 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