Use split function to add lots on move when available

The split function ensures that customer moves of drop shipment are split also
when splitting supplier moves.

Closes #13037

modules/stock_lot/setup.py

@@ -47,7 +47,10 @@ for dep in info.get('depends', []):
         requires.append(get_require_version('trytond_%s' % dep))
 requires.append(get_require_version('trytond'))
 
-tests_require = [get_require_version('proteus')]
+tests_require = [
+    get_require_version('proteus'),
+    get_require_version('trytond_stock_split'),
+    ]
 
 setup(name=name,
     version=version,

modules/stock_lot/stock.py

@@ -541,20 +541,32 @@ class MoveAddLots(Wizard):
             lot = line.get_lot(self.record)
             lots.append(lot)
         Lot.save(lots)
-        if quantity_remaining:
-            self.record.quantity = quantity_remaining
-            self.record.save()
-        for i, (line, lot) in enumerate(zip(self.start.lots, lots)):
-            if not i and not quantity_remaining:
-                self.record.quantity = line.quantity
-                self.record.lot = lot
+        if hasattr(self.model, 'split'):
+            move = self.record
+            for line, lot in zip(self.start.lots, lots):
+                splits = move.split(line.quantity, self.record.unit, count=1)
+                splits.remove(move)
+                move.lot = lot
+                move.save()
+                if splits:
+                    move, = splits
+                else:
+                    break
+        else:
+            if quantity_remaining:
+                self.record.quantity = quantity_remaining
                 self.record.save()
-            else:
-                with Transaction().set_context(_stock_move_split=True):
-                    self.model.copy([self.record], {
-                            'quantity': line.quantity,
-                            'lot': lot.id,
-                            })
+            for i, (line, lot) in enumerate(zip(self.start.lots, lots)):
+                if not i and not quantity_remaining:
+                    self.record.quantity = line.quantity
+                    self.record.lot = lot
+                    self.record.save()
+                else:
+                    with Transaction().set_context(_stock_move_split=True):
+                        self.model.copy([self.record], {
+                                'quantity': line.quantity,
+                                'lot': lot.id,
+                                })
         return 'end'
 
 

modules/stock_lot/tests/scenario_stock_lot_move_add.json

@@ -0,0 +1,4 @@
+[
+    {"stock_split": false}
+    ,{"stock_split": true}
+]

modules/stock_lot/tests/scenario_stock_lot_move_add.rst

@@ -12,7 +12,10 @@ Imports::
 
 Activate modules::
 
-    >>> config = activate_modules('stock_lot')
+    >>> modules = ['stock_lot']
+    >>> if globals().get('stock_split', False):
+    ...     modules.append('stock_split')
+    >>> config = activate_modules(modules)
 
 Create company::
 

modules/stock_lot/tests/test_module.py

@@ -14,6 +14,7 @@ from trytond.transaction import Transaction
 class StockLotTestCase(CompanyTestMixin, ModuleTestCase):
     'Test Stock Lot module'
     module = 'stock_lot'
+    extras = ['stock_split']
 
     @with_transaction()
     def test_products_by_location(self):

modules/stock_lot/tryton.cfg

@@ -6,6 +6,7 @@ depends:
     stock
 extras_depend:
     sale_supply_drop_shipment
+    stock_split
 xml:
     ir.xml
     stock.xml