Attaches an attachable to the record.

If the record is persisted and unchanged, the attachment is saved to the database immediately. Otherwise, it’ll be saved to the DB when the record is next saved.

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("/path/to/face.jpg"), filename: "face.jpg", content_type: "image/jpeg")
person.avatar.attach(avatar_blob) # ActiveStorage::Blob object

Returns true if an attachment has been made.

class User < ApplicationRecord
  has_one_attached :avatar
end

User.new.avatar.attached? # => false

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.

Returns true if an attachment is not attached.

class User < ApplicationRecord
  has_one_attached :avatar
end

User.new.avatar.blank? # => true

Deletes the attachment without purging it, leaving its blob in place.

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

Purges the attachment through the queuing system.