Add some documentation

1 files changed, 17 insertions, 0 deletions

diff --git a/lib/active_storage/attached/many.rb b/lib/active_storage/attached/many.rb
index f1535dfbc6..99d980196a 100644
--- a/lib/active_storage/attached/many.rb
+++ b/lib/active_storage/attached/many.rb
@@ -1,20 +1,36 @@
+# Representation of multiple attachments to a model.
 class ActiveStorage::Attached::Many < ActiveStorage::Attached
   delegate_missing_to :attachments
 
+  # Returns all the associated attachment records.
+  #
+  # You don't have to call this method to access the attachments' methods as
+  # they are all available at the model level.
   def attachments
     @attachments ||= ActiveStorage::Attachment.where(record_gid: record.to_gid.to_s, name: name)
   end
 
+  # Associates one or several attachments with the current record, saving
+  # them to the database.
   def attach(*attachables)
     @attachments = attachments | Array(attachables).flatten.collect do |attachable|
       ActiveStorage::Attachment.create!(record_gid: record.to_gid.to_s, name: name, blob: create_blob_from(attachable))
     end
   end
 
+  # Checks the presence of attachments.
+  #
+  #   class Gallery < ActiveRecord::Base
+  #     has_many_attached :photos
+  #   end
+  #
+  #   Gallery.new.photos.attached? # => false
   def attached?
     attachments.any?
   end
 
+  # Directly purges each associated attachment (i.e. destroys the blobs and
+  # attachments and deletes the files on the service).
   def purge
     if attached?
       attachments.each(&:purge)
@@ -22,6 +38,7 @@ class ActiveStorage::Attached::Many < ActiveStorage::Attached
     end
   end
 
+  # Purges each associated attachment through the queuing system.
   def purge_later
     if attached?
       attachments.each(&:purge_later)