brotherton-erpnext/erpnext/patches/v12_0/setup_einvoice_fields.py

from __future__ import unicode_literals
import frappe
from frappe.custom.doctype.custom_field.custom_field import create_custom_fields
from erpnext.regional.india.setup import add_permissions, add_print_formats

def execute():
	company = frappe.get_all('Company', filters = {'country': 'India'})
	if not company:
		return

	frappe.reload_doc("custom", "doctype", "custom_field")
	frappe.reload_doc("regional", "doctype", "e_invoice_settings")
	custom_fields = {
		'Sales Invoice': [
			dict(fieldname='irn', label='IRN', fieldtype='Data', read_only=1, insert_after='customer', no_copy=1, print_hide=1,
				depends_on='eval:in_list(["Registered Regular", "SEZ", "Overseas", "Deemed Export"], doc.gst_category) && doc.irn_cancelled === 0'),
			
			dict(fieldname='ack_no', label='Ack. No.', fieldtype='Data', read_only=1, hidden=1, insert_after='irn', no_copy=1, print_hide=1),
		
			dict(fieldname='ack_date', label='Ack. Date', fieldtype='Data', read_only=1, hidden=1, insert_after='ack_no', no_copy=1, print_hide=1),

			dict(fieldname='irn_cancelled', label='IRN Cancelled', fieldtype='Check', no_copy=1, print_hide=1,
				depends_on='eval:(doc.irn_cancelled === 1)', read_only=1, allow_on_submit=1, insert_after='customer'),

			dict(fieldname='eway_bill_cancelled', label='E-Way Bill Cancelled', fieldtype='Check', no_copy=1, print_hide=1,
				depends_on='eval:(doc.eway_bill_cancelled === 1)', read_only=1, allow_on_submit=1, insert_after='customer'),

			dict(fieldname='signed_einvoice', fieldtype='Code', options='JSON', hidden=1, no_copy=1, print_hide=1, read_only=1),

			dict(fieldname='signed_qr_code', fieldtype='Code', options='JSON', hidden=1, no_copy=1, print_hide=1, read_only=1),

			dict(fieldname='qrcode_image', label='QRCode', fieldtype='Attach Image', hidden=1, no_copy=1, print_hide=1, read_only=1)
		]
	}
	create_custom_fields(custom_fields, update=True)
	add_permissions()
	add_print_formats()

	einvoice_cond = 'in_list(["Registered Regular", "SEZ", "Overseas", "Deemed Export"], doc.gst_category)'
	t = {
		'mode_of_transport': [{'default': None}],
		'distance': [{'mandatory_depends_on': f'eval:{einvoice_cond} && doc.transporter'}],
		'gst_vehicle_type': [{'mandatory_depends_on': f'eval:{einvoice_cond} && doc.mode_of_transport == "Road"'}],
		'lr_date': [{'mandatory_depends_on': f'eval:{einvoice_cond} && in_list(["Air", "Ship", "Rail"], doc.mode_of_transport)'}],
		'lr_no': [{'mandatory_depends_on': f'eval:{einvoice_cond} && in_list(["Air", "Ship", "Rail"], doc.mode_of_transport)'}],
		'vehicle_no': [{'mandatory_depends_on': f'eval:{einvoice_cond} && doc.mode_of_transport == "Road"'}],
		'ewaybill': [
			{'read_only_depends_on': 'eval:doc.irn && doc.ewaybill'},
			{'depends_on': 'eval:((doc.docstatus === 1 || doc.ewaybill) && doc.eway_bill_cancelled === 0)'}
		]
	}

	for field, conditions in t.items():
		for c in conditions:
			[(prop, value)] = c.items()
			frappe.db.set_value('Custom Field', { 'fieldname': field }, prop, value)