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# Mounted uploaders are destroyed by carrierwave's after_commit
# hook. This hook fetches upload location (local vs remote) from
# Upload model. So it's neccessary to make sure that during that
# after_commit hook model's associated uploads are not deleted yet.
# IOW we can not use dependent: :destroy :
# has_many :uploads, as: :model, dependent: :destroy
#
# And because not-mounted uploads require presence of upload's
# object model when destroying them (FileUploader's `build_upload` method
# references `model` on delete), we can not use after_commit hook for these
# uploads.
#
# Instead FileUploads are destroyed in before_destroy hook and remaining uploads
# are destroyed by the carrierwave's after_commit hook.
module WithUploads
extend ActiveSupport::Concern
# Currently there is no simple way how to select only not-mounted
# uploads, it should be all FileUploaders so we select them by
# `uploader` class
FILE_UPLOADERS = %w(PersonalFileUploader NamespaceFileUploader FileUploader).freeze
included do
has_many :uploads, as: :model
before_destroy :destroy_file_uploads
end
# mounted uploads are deleted in carrierwave's after_commit hook,
# but FileUploaders which are not mounted must be deleted explicitly and
# it can not be done in after_commit because FileUploader requires loads
# associated model on destroy (which is already deleted in after_commit)
def destroy_file_uploads
self.uploads.where(uploader: FILE_UPLOADERS).find_each do |upload|
upload.destroy
end
end
end
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