def first_or_create(query_attrs = {}, resource_attrs = {})
      conditions(query_attrs)
      klass = Parse::Model.find_class self.table
      if klass.blank?
        raise ArgumentError, "Parse model with class name #{self.table} is not registered."
      end
      hash_constraints = constraints(true)
      klass.first_or_create(hash_constraints, resource_attrs)
    end
def first_or_create(query_attrs = {}, resource_attrs = {})
      conditions(query_attrs)
      klass = Parse::Model.find_class self.table
      if klass.blank?
        raise ArgumentError, "Parse model with class name #{self.table} is not registered."
      end
      hash_constraints = constraints(true)
      klass.first_or_create(hash_constraints, resource_attrs)
    end
Supporting the `first_or_create` class method to be used in scope chaining with queries.
 @!visibility private