Integer, Numeric and Float allow None as value

NULL value is None and not False

issue2022
review237004

stock.py

@@ -8,7 +8,7 @@ from trytond.pool import Pool
 
 class Move(ModelSQL, ModelView):
     _name = 'stock.move'
-    anglo_saxon_quantity = fields.Float('Anglo-Saxon Quantity',
+    anglo_saxon_quantity = fields.Float('Anglo-Saxon Quantity', required=True,
         digits=(16, Eval('unit_digits', 2)), depends=['unit_digits'])
 
     def __init__(self):

tests/scenario_account_stock_anglo_saxon.rst

@@ -154,6 +154,7 @@ Create product::
     >>> product.list_price = Decimal('10')
     >>> product.cost_price = Decimal('5')
     >>> product.cost_price_method = 'fixed'
+    >>> product.delivery_time = 0
     >>> product.account_expense = expense
     >>> product.account_revenue = revenue
     >>> product.account_stock = stock
@@ -174,7 +175,7 @@ Create payment term::
     >>> PaymentTerm = Model.get('account.invoice.payment_term')
     >>> PaymentTermLine = Model.get('account.invoice.payment_term.line')
     >>> payment_term = PaymentTerm(name='Direct')
-    >>> payment_term_line = PaymentTermLine(type='remainder')
+    >>> payment_term_line = PaymentTermLine(type='remainder', days=0)
     >>> payment_term.lines.append(payment_term_line)
     >>> payment_term.save()