No compatibility with Rails >5.0

[tB0nE]

"ActionDispatch::Callbacks.to_prepare do" in init.rb is depreciated, I believe it can just be replaced with:

"ActiveSupport::Reloader.to_prepare do"

"alias_method_chain :save_attachments, :pasted_images" in attachment_patch.rb is depreciated (alias_method_chain), it needs to be replaced with Module#prepend but I don't know ruby so I don't really know how to do this.

[SeparateReality]

I am not familiar with ruby either. Came a bit futher but something is still missing:

1. I replaced ActionDispatch::Callbacks.to_prepare do in init.rb with
   ActiveSupport::Reloader.to_prepare do
   I guess that's the easy part.

2. Using Module#prepend instead of alias_method_chain probably needs some more rework.
   Looking at this post https://littlelines.com/blog/2018/01/31/replace-alias-method-chain
   I tried the following in attachement_path.rb (to replace alias_method_chain)

alias_method :save_attachments_without_pasted_images, :save_attachments
alias_method :save_attachments, :save_attachments_with_pasted_images

Now the errors are gone but when pasting an image it is not saved....

Would be great if someone could resolve this issue. Otherwise this fantastic plugin wont work with Redmine >= 3.4.5

[kzalewski]

The pull request from Utopism (PR #80) resolves this issue. I urge the author of clipboard_image_paste to please approve and merge this pull request as soon as possible.