ActiveSupport::MessageVerifier::InvalidSignature: ActiveSupport::MessageVerifier::InvalidSignature Error in rails 5

Question

Before migrating to rails 5 it was working nicely, but when I migrated to rails 5.1.1 it is giving me error like

ActiveSupport::MessageVerifier::InvalidSignature: ActiveSupport::MessageVerifier::InvalidSignature

I have used same key that we were using in the previous version of rails.

Ex.

crypt = ActiveSupport::MessageEncryptor.new(Rails.configuration.secret_key_base)

After executing following line I am getting the mentioned error.

@password = crypt.decrypt_and_verify(User.last.encryptedpass)

Answer 1

In my case I was sending undefined (string) to a video field (ActiveStorage)

Answer 2

User.last.encryptedpass (User.last.encrypted_password) Are you using devise or our on encryption method?

Raises InvalidSignature if the message was not signed with the same secret or was not Base64-encoded.

http://api.rubyonrails.org/v5.1/classes/ActiveSupport/MessageVerifier.html

Answer 3

In my case, I used a name for the attachment

has_one_attached :report

that was already used in the entity (as a table column name)

Answer 4

In my case I was using form_tag to send the image to the backend. Using form_with solved my problem.