create_or_update method in rails

Question

if ClassName.exists?(["id = ?", self.id])
  object = ClassName.find_by_name(self.name)
  object.update_attributes!( :street_address => self.street_address,
    :city_name => self.city_name,
    :name => self.org_unit_name,
    :state_prov_id => self.state_prov_id,
    :zip_code => self.zip_code)
else
  ClassName.create! :street_address => self.street_address,
    :city_name => self.city_name,
    :federalid => self.federalid,
    :name => self.org_unit_name,
    :state_prov_id => self.state_prov_id,
    :zip_code => self.zip_code
end

I have code like this. But i want to improve it like the method something like create_or_update.

    ClassName.create_or_update_by_name(:name => self.name,
    :street_address => self.street_address,
    :city_name => self.city_name,
    :federalid => self.federalid,
    :name => self.org_unit_name,
    :state_prov_id => self.state_prov_id,
    :zip_code => self.zip_code)

If name is exist in database than it should update that object otherwise it will create a new object.

Is there any method exist with that i can update attribute if object exist otherwise i create it.

Answer 1

person = Person.find_by_name(name) || Person.new(:name => name)
person.update_attributes!(:street_address => street_address, :city_name => city_name) #etc etc

Answer 2

my_class = ClassName.find_or_initialize_by_name(name)

my_class.update_attributes({
   :street_address => self.street_address,
   :city_name => self.city_name,
   :federalid => self.federalid,
   :name => self.org_unit_name,
   :state_prov_id => self.state_prov_id,
   :zip_code => self.zip_code
})