class ActiveAdmin::Views::TableFor::Column

def initialize(*args, &block) 

def initialize(*args, &block)
  @options = args.extract_options!
  @title = args[0]
  @html_class = @options.delete(:class) || @title.to_s.downcase.underscore.gsub(/ +/,'_')
  @data  = args[1] || args[0]
  @data = block if block
  @resource_class = args[2]
end

def pretty_title 

def pretty_title
  if @title.is_a?(Symbol)
    default_title =  @title.to_s.titleize
    if @options[:i18n] && @options[:i18n].respond_to?(:human_attribute_name)
      @title = @options[:i18n].human_attribute_name(@title, :default => default_title)
    else
      default_title
    end
  else
    @title
  end
end

def sort_key


# => Sort key will be 'login'
column('Username', :sortable => 'login'){ @user.pretty_name }

sort the column on:
will not be sortable unless you pass a string to sortable to
If you pass a block to be rendered for this column, the column

column :username, :sortable => 'other_column_to_sort_on'
to the sortable option:
You can set the sort key by passing a string or symbol

# => Sort key will be set to 'username'
column :username
Defaults to the column's method if its a symbol

Returns the key to be used for sorting this column
def sort_key
  # If boolean or nil, use the default sort key.
  if @options[:sortable] == true || @options[:sortable] == false || @options[:sortable].nil?
    @data.to_s
  else
    @options[:sortable].to_s
  end
end

def sortable? 

def sortable?
  if @data.is_a?(Proc)
    [String, Symbol].include?(@options[:sortable].class)
  elsif @options.has_key?(:sortable)
    @options[:sortable]
  elsif @data.respond_to?(:to_sym) && @resource_class
    !@resource_class.reflect_on_association(@data.to_sym)
  else
    true
  end
end