module ActionView # = Action View Debug Helper # # Provides a set of methods for making it easier to debug Rails objects. module Helpers module DebugHelper include TagHelper # Returns a YAML representation of +object+ wrapped with
 and 
. # If the object cannot be converted to YAML using +to_yaml+, +inspect+ will be called instead. # Useful for inspecting an object at the time of rendering. # # @user = User.new({ username: 'testing', password: 'xyz', age: 42}) %> # debug(@user) # # => #
--- !ruby/object:User
      #   attributes:
      #     updated_at:
      #     username: testing
      #
      #     age: 42
      #     password: xyz
      #     created_at:
      #   attributes_cache: {}
      #
      #   new_record: true
      #   
def debug(object) begin Marshal::dump(object) object = ERB::Util.html_escape(object.to_yaml).gsub(" ", "  ").html_safe content_tag(:pre, object, :class => "debug_dump") rescue Exception # errors from Marshal or YAML # Object couldn't be dumped, perhaps because of singleton methods -- this is the fallback content_tag(:code, object.to_yaml, :class => "debug_dump") end end end end end