[FIX] l10n_in: missing .id on uom.uom

Introduced in 18a823e3
and backport of 514f640c

closes odoo/odoo#77192

X-original-commit: 917be413
Signed-off-by: Josse Colpaert <jco@openerp.com>
Signed-off-by: William André (wan) <wan@odoo.com>

addons/l10n_in/models/account_invoice.py

@@ -58,7 +58,7 @@ class AccountMove(models.Model):
         res = super()._get_tax_grouping_key_from_tax_line(tax_line)
         if tax_line.move_id.journal_id.company_id.country_id.code == 'IN':
             res['product_id'] = tax_line.product_id.id
-            res['product_uom_id'] = tax_line.product_uom_id
+            res['product_uom_id'] = tax_line.product_uom_id.id
         return res
 
     @api.model
@@ -67,7 +67,7 @@ class AccountMove(models.Model):
         res = super()._get_tax_grouping_key_from_base_line(base_line, tax_vals)
         if base_line.move_id.journal_id.company_id.country_id.code == 'IN':
             res['product_id'] = base_line.product_id.id
-            res['product_uom_id'] = base_line.product_uom_id
+            res['product_uom_id'] = base_line.product_uom_id.id
         return res
 
     @api.model
@@ -77,7 +77,7 @@ class AccountMove(models.Model):
 
         tax_key += [
             line.product_id.id,
-            line.product_uom_id,
+            line.product_uom_id.id,
         ]
         return tax_key