class BackupStorage::Attached::One

Representation of a single attachment to a model.

Public Instance Methods

attach(attachable) click to toggle source

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) # BackupStorage::Blob object
# File lib/backup_storage/attached/one.rb, line 20
def attach(attachable)
  write_attachment \
    BackupStorage::Attachment.create!(record: record, name: name, blob: create_blob_from(attachable))
end
attached?() click to toggle source

Returns true if an attachment has been made.

class User < ActiveRecord::Base
  has_one_attached :avatar
end

User.new.avatar.attached? # => false
# File lib/backup_storage/attached/one.rb, line 32
def attached?
  attachment.present?
end
attachment() click to toggle source

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.

# File lib/backup_storage/attached/one.rb, line 9
def attachment
  record.public_send("#{name}_attachment")
end
purge() click to toggle source

Directly purges the attachment (i.e. destroys the blob and attachment and deletes the file on the service).

# File lib/backup_storage/attached/one.rb, line 38
def purge
  if attached?
    attachment.purge
    write_attachment nil
  end
end
purge_later() click to toggle source

Purges the attachment through the queuing system.

# File lib/backup_storage/attached/one.rb, line 46
def purge_later
  if attached?
    attachment.purge_later
  end
end

Private Instance Methods

write_attachment(attachment) click to toggle source
# File lib/backup_storage/attached/one.rb, line 53
def write_attachment(attachment)
  record.public_send("#{name}_attachment=", attachment)
end