Divergent method signature for "count". Will Paginate does not work with Rails 4.1.2rc1.

[schneems]

We're using will_paginate on codetriage/codetriage and recently tried upgrading to Rails 4.1.2.rc1. While doing so we found there is an issue in the will_paginate method page_entries_info.

page_entries_info calls collection.size. The size method has been monkey patched but calls super which is defined in activerecord. The built in size method was changed in this commit: rails/rails@afd4d82

So that count is called with an argument :all. Unfortunately count is also overwritten by will_paginate and it does not have the same method signature, so it fails.

Here's the backtrace:

wrong number of arguments (1 for 0)
will_paginate (3.0.5) lib/will_paginate/active_record.rb:81:in `count'
activerecord (4.1.2.rc1) lib/active_record/relation.rb:241:in `size'
will_paginate (3.0.5) lib/will_paginate/active_record.rb:97:in `size'
will_paginate (3.0.5) lib/will_paginate/view_helpers.rb:128:in `page_entries_info'

I found this while investigating rails/rails#15430, though the issues seem to be unrelated.

[schneems]

Thanks ❤️