Want to customize Stock Ledger Entry

[nishith]

I have added 3 fields in Stock Ledger Entry. I want to set that fields using an other app (For customization purpose). How can I set those 3 fields from other app without affecting the existing fields ? I want to make an entry of that field on submitting the “Purchase Receipt” and “Purchase Invoice”.

[revant_one]

How can I add validator to Purchase Order(or other system doctypes)?

@nnylyj ok, then you can use hooks to call validate method call your custom python function on validate event. add this in hooks.py under doc_events write your python function, you have access to all field value using self.field_name. To invalidate you can write frappe.throw(“message”)

add doc_events hook for Purchase Receipt and Purchase Invoice.

in the function, get_doc the related stock ledger entries and set values.