Minor Fix field required

.gitignore

@@ -0,0 +1,29 @@
+# See https://help.github.com/ignore-files/ for more about ignoring files.
+
+# dependencies
+/build
+/dist
+*egg-info
+
+
+/node_modules
+
+# testing
+/coverage
+
+# production
+/build
+
+# misc
+
+.DS_Store
+
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+package-lock*
+
+/__pycache__
+/app/__pycache__
+/app/commons/__pycache__

purchase.py

@@ -44,7 +44,7 @@ class PurchaseLine(metaclass=PoolMeta):
         states=STATES)
     gross_unit_price_wo_round = fields.Numeric('Gross Price without rounding',
         digits=(16, DIGITS + DISCOUNT_DIGITS), readonly=True)
-    discount = fields.Numeric('Discount', digits=(16, DISCOUNT_DIGITS), states=STATES)
+    discount = fields.Numeric('Discount', digits=(16, DISCOUNT_DIGITS))
     stock_quantity = fields.Function(fields.Float('Stock Quantity',
         digits=(16, 2), depends=['product'], states=STATES),
         'on_change_with_stock_quantity')
@@ -65,6 +65,9 @@ class PurchaseLine(metaclass=PoolMeta):
             cls.amount.on_change_with.add('gross_unit_price')
         if 'discount' not in cls.quantity.on_change:
             cls.quantity.on_change.add('discount')
+        cls._error_messages.update({
+            'purchase_without_warehouse': ('Missing warehouse in purchase'),
+        })
 
     @staticmethod
     def default_discount():
@@ -118,6 +121,8 @@ class PurchaseLine(metaclass=PoolMeta):
     @fields.depends('product', 'purchase')
     def on_change_with_stock_quantity(self, name=None):
         res = 0
+        if not self.purchase.warehouse:
+            self.raise_user_error('purchase_without_warehouse')
         location_id = self.purchase.warehouse.id
         if self.product:
             stock_context = {

tryton.cfg

@@ -5,6 +5,7 @@ depends:
     purchase
     account_invoice_discount
     purchase_shipment_cost
+    purchase_editable_line
 xml:
     product.xml
     purchase.xml