diff options
Diffstat (limited to 'activestorage/lib/active_storage/attached/one.rb')
-rw-r--r-- | activestorage/lib/active_storage/attached/one.rb | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/activestorage/lib/active_storage/attached/one.rb b/activestorage/lib/active_storage/attached/one.rb new file mode 100644 index 0000000000..2e5831348e --- /dev/null +++ b/activestorage/lib/active_storage/attached/one.rb @@ -0,0 +1,60 @@ +# frozen_string_literal: true + +module ActiveStorage + # Representation of a single attachment to a model. + class Attached::One < Attached + delegate_missing_to :attachment + + # Returns the associated attachment record. + # + # You don't have to call this method to access the attachment's methods as + # they are all available at the model level. + def attachment + record.public_send("#{name}_attachment") + end + + # Associates a given attachment with the current record, saving it to the database. + # Examples: + # + # person.avatar.attach(params[:avatar]) # ActionDispatch::Http::UploadedFile object + # person.avatar.attach(params[:signed_blob_id]) # Signed reference to blob from direct upload + # person.avatar.attach(io: File.open("~/face.jpg"), filename: "face.jpg", content_type: "image/jpg") + # person.avatar.attach(avatar_blob) # ActiveStorage::Blob object + def attach(attachable) + write_attachment \ + ActiveStorage::Attachment.create!(record: record, name: name, blob: create_blob_from(attachable)) + end + + # Returns true if an attachment has been made. + # + # class User < ActiveRecord::Base + # has_one_attached :avatar + # end + # + # User.new.avatar.attached? # => false + def attached? + attachment.present? + end + + # Directly purges the attachment (i.e. destroys the blob and + # attachment and deletes the file on the service). + def purge + if attached? + attachment.purge + write_attachment nil + end + end + + # Purges the attachment through the queuing system. + def purge_later + if attached? + attachment.purge_later + end + end + + private + def write_attachment(attachment) + record.public_send("#{name}_attachment=", attachment) + end + end +end |