diff options
| -rw-r--r-- | activerecord/lib/active_record/associations.rb | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/associations.rb b/activerecord/lib/active_record/associations.rb index 4ec1c8d545..54390e612f 100644 --- a/activerecord/lib/active_record/associations.rb +++ b/activerecord/lib/active_record/associations.rb @@ -1146,6 +1146,20 @@ module ActiveRecord # has_many :employees, -> { joins(:address) } # has_many :posts, ->(post) { where("max_post_length > ?", post.length) } # + # === Extensions + # + # The +extension+ argument allows you to pass a block into a has_many + # association. This is useful for adding new finders, creators and other + # factory-type methods to be used as part of the association. + # + # Extension examples: + # has_many :employees do + # def find_or_create_by_name(name) + # first_name, last_name = name.split(" ", 2) + # find_or_create_by(first_name: first_name, last_name: last_name) + # end + # end + # # === Options # [:class_name] # Specify the class name of the association. Use it only if that name can't be inferred |