ruby-on-rails - Rails.application.assets 在生产环境中的等价物是什么？

Question

我正在使用 Sass::Engine 动态编译 css 文件，我需要将环境和加载路径传递给 sprockets。这在开发中工作得很好:

def compile_scss
  view_context = ActionView::Base.new
  environment = Rails.application.assets

  # body and filename are instance variables created elsewhere        
  @compiled_file = Sass::Engine.new(body,
                                    filename: filename,
                                    syntax: :scss,
                                    cache: false,
                                    load_paths: environment.paths,
                                    sprockets: {
                                      context: view_context,
                                      environment: environment
                                    }).render
end

但生产失败，因为 Rails.application.assets是 nil .生产中的等价物是什么？

Answer 1

Rails.application.assets 总是 nil在生产中，因为 Assets 是从公共(public)文件夹预编译和提供的(感谢@bkunzi01)。此外，Sprockets 只需要将 Assets 路径传递给它即可运行，而不需要环境。路径可从 Rails.application.config.assets.paths 获得.我能够让我的样式表编译器使用以下方法。

def compile_scss
  view_context = ActionView::Base.new
  environment = Rails.application.assets || Rails.application.config.assets

  # body and filename are instance variables created elsewhere        
  @compiled_file = Sass::Engine.new(body,
                                    filename: filename,
                                    syntax: :scss,
                                    cache: false,
                                    load_paths: environment.paths,
                                    sprockets: {
                                      context: view_context,
                                    }).render
end