Today I found an interesting edge case in using Sass or SCSS in Rails with the asset pipeline.
The manifest file in this Rails application was an
application.scss file and was using
@import statements instead of require statements.
However, two of the lines were:
@import "chosen/chosen.css"; @import "flowplayer/flowplayer.css";
These look innocent enough. But when the application was deployed to production, the
application.css file started with
@import url(chosen/chosen.css); @import url(flowplayer/flowplayer.css); html,body,div,span,applet...
Which was then causing a Failed to load resource: the server responded with a 404 (Not Found) status as the browser was trying to load, individually, the chosen and flowplayer CSS files as individual files outside of the asset pipeline.
Well, reading the Rails Guide on the Asset Pipeline I found the section that stated:
"If you want to use multiple Sass files, you should generally use the Sass @import rule instead of these Sprockets directives. When using Sprockets directives, Sass files exist within their own scope, making variables or mixins only available within the document they were defined in."
Following the link to the Sass @import rule, I found that there were a couple of situations where instead of importing the file, it will compile the @import into a CSS import command.
So the fix was removing
.css from the end of both files, and voila, magic happens, the import statements are no longer compiled into CSS import commands but inlined into the generated
application.css as expected, which made the mainfest file look like this:
@import "chosen/chosen"; @import "flowplayer/flowplayer";
Then re-running the
assets:precompile rake task as part of the OpsCare deployment in production solved the problem.
Hopefully this helps someone else not lose the hour I just lost :)
Tips on Adapting to Remote Work
Reducing Developer Friction With Rails 6’s Actionable Errors
What makes a good developer a great developer?
reinteractive is Australia’s largest dedicated Ruby on Rails development company. We don’t cut corners and we know what we are doing.
We are an organisation made up of amazing individuals and we take pride in our team. We are 100% remote work enabling us to choose the best talent no matter which part of the country they live in. reinteractive is dedicated to making it a great place for any developer to work.
Webinars are our online portal for tips, tricks and lessons learned in everything we do. Make the most of this free resource to help you become a better developer.
The Ruby on Rails Installfest includes a full setup of your development environment and step-by-step instructions on how to build your first app hosted on Heroku. Over 1,800 attendees to date and counting.
The Ruby on Rails Development Hub is a monthly event where you will get the chance to spend time with our team and others in the community to improve and hone your Ruby on Rails skills.