I’ve written about the disguise gem before, but I’ve made enough changes that it warrants a new blog post. I noticed a few performance problems which have now been fixed and the configuration has been cleaned up a bit.
Disguise makes it simple to swap out the views used by your rails application either by selecting a theme using an admin UI or by changing out the theme based on the current url. For most apps the feature is probably not relevant, but if you are building a piece of software like a blog or social network then letting your users customize the look of the site is crucial to adoption.
Find the install instructions on the project’s github account.
While setting a given theme works fine and doesn’t incur much of a performance hit beyond method call, swapping out the theme based on the current domain can incur a performance hit since it reloads the localization strings. Here’s the bit of code that swaps the views:
def setup_theme return if !Disguise::Config.themes_enabled return if current_theme.blank? || current_theme.name.blank? theme_view_path = File.join(Disguise::Config.theme_full_base_path, current_theme.name, 'views') if self.view_paths.first == theme_view_path return else return if !theme_exists(theme_view_path) clean_theme_view_path self.prepend_view_path(theme_view_path) clean_theme_locale set_theme_locale I18n.reload! end end </pre>I'm hoping to find a way to improve performance when changing themes, but for now be aware that changing themes based on domains is a work in progress and shouldn't be used in a production environment.