module Shrine::Plugins::AtomicHelpers::AttacherClassMethods
Public Instance Methods
retrieve(model: nil, entity: nil, name:, file:, **options)
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Retrieves the attacher from the given entity/model and verifies that the attachment hasn’t changed. It raises ‘Shrine::AttachmentChanged` exception if the attached file doesn’t match.
Shrine::Attacher.retrieve(model: photo, name: :image, file: file_data) #=> #<ImageUploader::Attacher>
# File lib/shrine/plugins/atomic_helpers.rb, line 17 def retrieve(model: nil, entity: nil, name:, file:, **options) fail ArgumentError, "either :model or :entity is required" unless model || entity record = model || entity attacher = record.send(:"#{name}_attacher", **options) if record.respond_to?(:"#{name}_attacher") attacher ||= from_model(record, name, **options) if model attacher ||= from_entity(record, name, **options) if entity if attacher.file != attacher.uploaded_file(file) fail Shrine::AttachmentChanged, "attachment has changed" end attacher end