Question

I have a model with 30 attributes. but those attributes can be grouped in 2 groups.

For example I have:

string:title
string:text
...

and

string:title_old
string:text_old
...

I want to be able: When I check title attribute at the same time to check the title_old attribute. Can I perform that with a loop if I make an array of the 15 first strings or I should write hard coded if statements

Final goal:

        [
          {
             :name => :title,
             :y => 1 (constant),
             :color=> red, (if title_old == "something" color = red else color = green)
          },
          {
             :name=> :text,
             :y => 1 (constant)
             :color => red (if text_old == "something" color = red else color = green)
          },
          .... (all other 13 attributes)
       ]

Answer 1

your model:

class MyModel < AR::Base
  def attributize
    attrs = self.attributes.except(:created_at, :updated_at).reject{ |attr, val| attr =~ /.*_old/ && !val }
    attrs.inject([]) do |arr, (attr, val)|
      arr << { :name => attr, :y => 1, :color => (self.send("#{attr}_old") == "something" ? "red" : "green") }
    end
  end
end

usage:

my_object = MyModel.last
my_object.attributize