Fix

sale.py

@@ -177,6 +177,7 @@ class Sale(metaclass=PoolMeta):
         User = Pool().get('res.user')
         context = Transaction().context
         today = date.today()
+        print('>>>>>>>>', args)
         if context.get('shop'):
             shop = Shop(context['shop'])
         else:
@@ -187,13 +188,11 @@ class Sale(metaclass=PoolMeta):
             if v.get('id'):
                 del v['id']
             v['type'] = 'line'
-            product = Product(v['product.']['id'])
-            unit_price = v['product.']['list_price']
-            v['unit_price'] = Decimal(unit_price).quantize(Decimal(str(10.0 ** -4)))
-            v['base_price'] = Decimal(unit_price).quantize(Decimal(str(10.0 ** -4)))
-            if v.get('product.'):
-                del v['product.']
-            v['product'] = product.id
+            product = Product(v['product'])
+            unit_price = product.template.list_price
+            unit_price = unit_price.quantize(Decimal(str(10.0 ** -4)))
+            v['unit_price'] = unit_price
+            v['base_price'] = unit_price
             v['unit'] = product.template.default_uom.id
             v['description'] = product.name
             taxes = list(product.account_category.customer_taxes_used)
@@ -204,7 +203,7 @@ class Sale(metaclass=PoolMeta):
             'shop': shop.id,
             'party': party.id,
             'invoice_type':'P',
-            'table_assigned': args['table_assigned.']['id'],
+            'table_assigned': args['table_assigned']['id'],
             'shipment_address': party.addresses[0].id,
             'invoice_address': party.addresses[0].id,
             'company': shop.company.id,
@@ -215,6 +214,8 @@ class Sale(metaclass=PoolMeta):
             'state': 'draft',
             'lines': [('create', args['lines'])],
         }
+        if args.get('description'):
+            to_create['description'] = args.get('description')
         try:
             sale, = cls.create([to_create])
         except Exception as e:

setup.py

@@ -89,7 +89,6 @@ setup(name=name,
         'Natural Language :: English',
         'Natural Language :: Spanish',
         'Operating System :: OS Independent',
-        'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
         'Programming Language :: Python :: 3.9',
@@ -109,4 +108,4 @@ setup(name=name,
     test_suite='tests',
     test_loader='trytond.test_loader:Loader',
     tests_require=tests_require,
-    )
+)