1 files changed, 51 insertions, 0 deletions
diff --git a/activestorage/lib/active_storage/attached/many.rb b/activestorage/lib/active_storage/attached/many.rb
new file mode 100644
index 0000000000..035cd9c091
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+++ b/activestorage/lib/active_storage/attached/many.rb
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+# Decorated proxy object representing of multiple attachments to a model.
+class ActiveStorage::Attached::Many < ActiveStorage::Attached
+  delegate_missing_to :attachments
+
+  # Returns all the associated attachment records.
+  #
+  # All methods called on this proxy object that aren't listed here will automatically be delegated to `attachments`.
+  def attachments
+    record.public_send("#{name}_attachments")
+  end
+
+  # Associates one or several attachments with the current record, saving them to the database.
+  # Examples:
+  #
+  #   document.images.attach(params[:images]) # Array of ActionDispatch::Http::UploadedFile objects
+  #   document.images.attach(params[:signed_blob_id]) # Signed reference to blob from direct upload
+  #   document.images.attach(io: File.open("~/racecar.jpg"), filename: "racecar.jpg", content_type: "image/jpg")
+  #   document.images.attach([ first_blob, second_blob ])
+  def attach(*attachables)
+    attachables.flatten.collect do |attachable|
+      attachments.create!(name: name, blob: create_blob_from(attachable))
+    end
+  end
+
+  # Returns true if any attachments has been made.
+  #
+  #   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)
+      attachments.reload
+    end
+  end
+
+  # Purges each associated attachment through the queuing system.
+  def purge_later
+    if attached?
+      attachments.each(&:purge_later)
+    end
+  end
+end