If you have the list of symbols you can iterate through them and select the ones that are true
symbols = [:attr_1, :attr_2, :attr_3]
symbols.select {|sym| object.send(sym) == true }
If you don't have the list of symbols you want you can simply iterate through all the attributes of the model
symbols = object.attributes
symbols.select {|sym| object.send(sym) == true }