Request fingerprint does not work with other item types except scrapy.item.Item

[InzamamAnwar]

Testing with latest version of Scrapy, I found out that yielding Dataclass objects do not work with scrapy-deltafetch. If the object type is changed to scrapy.item.Item the plugin works as intended.

Has anyone else tried it?

What if using dataclass is necessary?

[palvarezcordoba]

Hi @InzamamAnwar
Check this: https://github.com/scrapy-plugins/scrapy-deltafetch/blob/master/scrapy_deltafetch/middleware.py#L74
You could add a check for dataclasses.
It can be done like this:

import dataclasses
dataclasses.is_dataclass(r)

This repo seems to be unmaintained. You could make a fork and use your own version. I think it's unlikely that if you make a MR it will be merged, but you could try.