After the commit https://github.com/mileszs/wicked_pdf/pull/68/files in the gem wicked_pdf I’m not able anymore to work without asset pipeline.
Is there a way to make the railtie include the module WickedPdfHelper instead of WickedPdfHelper::Assets? (look in the commit)
Copy the non-asset helpers from that file into one of your application helper files.
This will monkeypatch the behavior of wicked_pdf_image_tag and the like.