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ruby-on-railsruby-on-rails-5rails-activestorageruby-on-rails-5.2

Get MD5 Hash with Active Storage Image

Before updating to Rails 5.2 I created my MD5 Hashes from Paperclip images this way: json.image_md5 Digest::MD5.file(monument.image.path(:mobile)).hexdigest

Now with Active Storage how can I do the same? I've tried already:

json.image_md5 Digest::MD5.file(url_for(monument.cover_image)).hexdigest
json.image_md5 Digest::MD5.file(rails_blob_path(monument.cover_image)).hexdigest
json.image_md5 Digest::MD5.file(Rails.application.routes.url_helpers.rails_blob_path(monument.cover_image, only_path: true)).hexdigest

But with no success. I'm getting an error for No such file or directory.

Can you help me? Thank you!

Solution

  • Active Storage computes a Base64-encoded MD5 digest of your file, available via monument.cover_image.checksum.