pdf_cover 0.2.0
Provides processors for both Carrierwave and Paperclip to allow having a version of a PDF attachment that is actually an image representing the first page on that PDF. This gem uses GhostScript, so it must be installed in order for it to work.
Gemfile:
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安裝:
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Runtime 相依性套件 (1):
rails
~> 4.2.4