has_one relation automatically set nil if more than one

Give a two models, with a has_one association:

class ShopInfo
  belongs_to :shop
end

class Shop
  has_one :shop_info
end


s = Shop.create
ss1 = s.create_shop_info

In some other place of my code I do

ss2 = s.create_shop_info

After this, ss1.shop_id is set to nil, so ss1 is now an orphan record.

Is there any way to remove previous records instead of set them to nil?

Solution

By default, the has_one association executes a nullify. Adding the dependent: :destroy solved the problem.

class Shop
  has_one :shop_info, dependent: :destroy
end

Just if someone wants more info, the ActiveRecord code for has_one replacement record is this:

BUT if you add a dependent option in the association, executes the delete method as well: