ruby on rails - Reference data from current owner of relationship with ActiveRecord -

i have these models

class exercisesolving < activerecord::base     belongs_to :exercise      attr_accessor :important_data end  class exercise < activerecord::base     has_many :exercise_solvings      def start         #1     end end 

how can reference current exercisesolving @ #1, when call attributes this:

exercisesolving.first.exercise.start 

i need :important_data current relationship inside of described function. there clean way to this? directly passing exercisesolving instance exercise seems dirty me.

try adhere law of demeter , encapsulate behavior:

class exercisesolving < activerecord::base   belongs_to :exercise    attr_accessor :important_data    def start     exercise.solve(important_data)   end end  class exercise < activerecord::base   has_many :exercise_solvings    def solve(data)     [...]   end end  @exercise_solving = exercisesolving.first @exercise_solving.start