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title: Shrine 2.9.0

New Plugins

• The infer_extension plugin has been added, which automatically infers the upload location extension from the MIME type if it’s unknown. This is useful when using the data_uri plugin (where the extension is always unknown), or the remote_url plugin (where the extension might not be known).

Shrine.plugin :infer_extension

New Features

• The determine_mime_type plugin has gained built-in support for the Marcel gem, Basecamp’s wrapper around the existing MimeMagic.

Shrine.plugin :determine_mime_type, analyzer: :marcel

• The versions plugin now supports saving arrays of files, as well as nested structures of arrays and hashes.

class PdfUploader < Shrine
  plugin :versions
  plugin :processing

  process(:store) do |io, context|
    [ file1, file2, ... ]
    # or
    { name1: [ file1, file2, ... ], ... }
    # or
    [ { name1: file1 }, ... ]
  end
end

• UploadedFile#open can now be called without passing a block. This is useful if you want to make it explicit when the uploaded file is opened, instead of it happening automatically when #read is called.

uploaded_file.open  # opens the local or remote file
uploaded_file.read  # read content
uploaded_file.close # close the file

• The Model#<attachment>_attacher now accepts options which are forwarded to Shrine::Attacher.new.

photo.image_attacher(store: :other_store)
photo.update(image: file) # uploads to :other_store

Other improvements

• Fixed backgrounding plugin not detecting options passed to Shrine::Attachment.new.

• Fixed S3 storage replacing whitespace with + symbols in original filename when assigning object's :content_disposition on upload.

• If an error occurs when downloading the file in UploadedFile#download and Storage::S3#download, the tempfile with partially downloaded content will now automatically be deleted.

• Shrine now uses the frozen-string-literal feature, which will reduce the number of string allocations.

Backwards compatibility

• The :filename option of the data_uri plugin has been deprecated in favour of the new infer_extension plugin.

• The multi_delete plugin has been deprecated, and the versions plugin isn't loading it by default anymore.