Support for custom fields

[herbiems89]

Currently in the process of digitizing all my invoices and Ive added a custom field "amount due" for my document type "invoice". It would be amazing if we could also let the LLMs handle use cases like this.
Obviously wed need to create a custom prompt for our custom fields, but from my naive standpoint, just from a technical perspective this shouldnt be to hard to implement, no? The framework is already there Id suppose.

[hensing]

I had the same idea today and was thinking, if we could use more of the features from the google document AI:
Try Google document-AI

It comes with an invoice-processor, a preatrained model, which extracts 30 fields, that could be mapped to custom fields in paperless:

[hensing]

I implemented a working version here:

Pull Request #593.

Feel free to test and comment :)