diff options
| -rw-r--r-- | activerecord/lib/active_record/nested_attributes.rb | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/nested_attributes.rb b/activerecord/lib/active_record/nested_attributes.rb index e09440d770..33611b410c 100644 --- a/activerecord/lib/active_record/nested_attributes.rb +++ b/activerecord/lib/active_record/nested_attributes.rb @@ -202,6 +202,22 @@ module ActiveRecord # You would need to modify it to look like this: # # attr_accessible :name, :posts_attributes + # + # === Validating the presence of a parent model + # + # If you want to validate that a child record is associated with a parent + # record, you can use <tt>validates_presence_of</tt> and + # <tt>inverse_of</tt> as this example illustrates: + # + # class Member < ActiveRecord::Base + # has_many :posts, :inverse_of => :member + # accepts_nested_attributes_for :posts + # end + # + # class Post < ActiveRecord::Base + # belongs_to :member, :inverse_of => :posts + # validates_presence_of :member + # end module ClassMethods REJECT_ALL_BLANK_PROC = proc { |attributes| attributes.all? { |_, value| value.blank? } } |