Question

ActiveAdmin is giving me an

Undefined mixin 'global-reset'.

error when it try to run

rake assets:precompile

ActiveAdmin is 0.3.4.
I have ActiveAdmin and an assets group in my Gemfile with sass, coffee-rails and uglifier.

Answer 1

The problem is indeed, as @dimitar points out, the line with the catch all because the asset pipeline is trying to compile partials and since they aren’t written to be compiled on their own, dependency issues appear.

Depending on your app, you might need that catch all, specially if you have many JS, CoffeScript and SCSS/SASS files in several child folders. In that situation you might encounter that rails complains because something isn’t compiled for production when the catch all is removed.

The solution is to have a catch all that excludes the SASS partials, _filename.css.[scss|sass] and that would solve it (worked for me!). I also included some other tips from other activeadmin suggestions including exactly some ActiveAdmin dependencies to be compiled. Here’s my code:

 # Include all JS files, also those in subdolfer or javascripts assets folder
 # includes for exmaple applicant.js. JS isn't the problem so the catch all works.
 config.assets.precompile += %w(*.js)
 # Replace %w( *.css *.js *.css.scss) with complex regexp avoiding SCSS partials compilation
 config.assets.precompile += [/^[^_]\w+\.(css|css.scss)$/]
 #Adding active_admin JS and CSS to the precompilation list
 config.assets.precompile += %w( active_admin.css active_admin.js active_admin/print.css )