Sometimes you just want to have a small web server that serves files to test something. Serve the current directory...
Web applications can be used by multiple users at the same time. A typical application server like Passenger has multiple...
When a Rails controller action should handle both HTML and JSON responses, do not use request.xhr? to decide that. Use...
You login to a Linux server with a performance issue: what do you check in the first minute? uptime
A while ago I tweeted a thread about how a small JavaScript snippet, one that can fit in a single...
JavaScripts and CSS should be minified for production use. In Rails 3.1+ the asset pipeline will take care of this...
Nowadays it is fairly easy to intercept and modify mails globally before they are sent. All you have to do...
When your public-facing application has a longer downtime for server maintenance or long migrations, it's nice to setup...
Unicorn allows you to specify the maximum number of workers. In development this could be useful if you use a...
The bin/webpack-dev-server command is not as smart as e.g. rails server, where it shows the proper fix within the error...
This collection contains some useful design resources for developers. Many of them were mentioned in the Refactoring UI tutorials.
When deploying, Capistrano puts a REVISION file into your application's release directory. It contains the hash of the commit...
validates_uniqueness_of is not sufficient to ensure the uniqueness of a value. The reason for this is that in...
I got this error after upgrading Ruby from 2.4.5 to 2.6.4 when I opened the Rails console - rails server still...
If you're suffering from a huge de.yml or similiar file, cry no more. Rails lets you freely organize your...
This is not an issue in newer versions of HAML (starting with 5.0.0), as the ugly-option was removed...
An alternative to this technique is using VCR. VCR allows you to record and replay real HTTP responses, saving you...
If you use webpacker in your Rails application, and you have completely disabled Sprockets, you might get the following error...