Adds ability to partially scrap build outputs (#4846)

* BuildOrder updates:

- Use batch code generation when creating a new build output
- Allow partial scrapping of build outputs

* Fixes for stock table

* Bump API version

* Update unit tests

InvenTree/build/models.py

@@ -797,7 +797,7 @@ class Build(MPTTModel, InvenTree.models.InvenTreeBarcodeMixin, InvenTree.models.
         items.all().delete()
 
     @transaction.atomic
-    def scrap_build_output(self, output, location, **kwargs):
+    def scrap_build_output(self, output, quantity, location, **kwargs):
         """Mark a particular build output as scrapped / rejected
 
         - Mark the output as "complete"
@@ -809,10 +809,25 @@ class Build(MPTTModel, InvenTree.models.InvenTreeBarcodeMixin, InvenTree.models.
         if not output:
             raise ValidationError(_("No build output specified"))
 
+        if quantity <= 0:
+            raise ValidationError({
+                'quantity': _("Quantity must be greater than zero")
+            })
+
+        if quantity > output.quantity:
+            raise ValidationError({
+                'quantity': _("Quantity cannot be greater than the output quantity")
+            })
+
         user = kwargs.get('user', None)
         notes = kwargs.get('notes', '')
         discard_allocations = kwargs.get('discard_allocations', False)
 
+        if quantity < output.quantity:
+            # Split output into two items
+            output = output.splitStock(quantity, location=location, user=user)
+            output.build = self
+
         # Update build output item
         output.is_building = False
         output.status = StockStatus.REJECTED

InvenTree/build/serializers.py

@@ -17,7 +17,7 @@ import InvenTree.helpers
 from InvenTree.serializers import InvenTreeDecimalField
 from InvenTree.status_codes import StockStatus
 
-from stock.models import StockItem, StockLocation
+from stock.models import generate_batch_code, StockItem, StockLocation
 from stock.serializers import StockItemSerializerBrief, LocationSerializer
 
 from part.models import BomItem
@@ -181,6 +181,45 @@ class BuildOutputSerializer(serializers.Serializer):
         return output
 
 
+class BuildOutputQuantitySerializer(BuildOutputSerializer):
+    """Serializer for a single build output, with additional quantity field"""
+
+    class Meta:
+        """Serializer metaclass"""
+        fields = BuildOutputSerializer.Meta.fields + [
+            'quantity',
+        ]
+
+    quantity = serializers.DecimalField(
+        max_digits=15,
+        decimal_places=5,
+        min_value=0,
+        required=True,
+        label=_('Quantity'),
+        help_text=_('Enter quantity for build output'),
+    )
+
+    def validate(self, data):
+        """Validate the serializer data"""
+
+        data = super().validate(data)
+
+        output = data.get('output')
+        quantity = data.get('quantity')
+
+        if quantity <= 0:
+            raise ValidationError({
+                'quantity': _('Quantity must be greater than zero')
+            })
+
+        if quantity > output.quantity:
+            raise ValidationError({
+                'quantity': _("Quantity cannot be greater than the output quantity")
+            })
+
+        return data
+
+
 class BuildOutputCreateSerializer(serializers.Serializer):
     """Serializer for creating a new BuildOutput against a BuildOrder.
 
@@ -226,6 +265,7 @@ class BuildOutputCreateSerializer(serializers.Serializer):
     batch_code = serializers.CharField(
         required=False,
         allow_blank=True,
+        default=generate_batch_code,
         label=_('Batch Code'),
         help_text=_('Batch code for this build output'),
     )
@@ -362,7 +402,7 @@ class BuildOutputScrapSerializer(serializers.Serializer):
             'notes',
         ]
 
-    outputs = BuildOutputSerializer(
+    outputs = BuildOutputQuantitySerializer(
         many=True,
         required=True,
     )
@@ -412,8 +452,10 @@ class BuildOutputScrapSerializer(serializers.Serializer):
         with transaction.atomic():
             for item in outputs:
                 output = item['output']
+                quantity = item['quantity']
                 build.scrap_build_output(
                     output,
+                    quantity,
                     data.get('location', None),
                     user=request.user,
                     notes=data.get('notes', ''),

InvenTree/build/templates/build/detail.html

@@ -302,7 +302,7 @@
     </div>
 
     <div class='panel-content'>
-        {% include "stock_table.html" with read_only=True prefix="build-" %}
+        {% include "stock_table.html" with prefix="build-" %}
     </div>
 </div>
 
@@ -343,6 +343,7 @@
 
 onPanelLoad('consumed', function() {
     loadStockTable($('#consumed-stock-table'), {
+        filterTarget: '#filter-list-consumed-stock',
         params: {
             location_detail: true,
             part_detail: true,
@@ -354,6 +355,7 @@ onPanelLoad('consumed', function() {
 
 onPanelLoad('completed', function() {
     loadStockTable($("#build-stock-table"), {
+        filterTarget: '#filter-list-build-stock',
         params: {
             location_detail: true,
             part_detail: true,

InvenTree/build/test_api.py

@@ -1027,12 +1027,15 @@ class BuildOutputScrapTest(BuildAPITest):
                 'outputs': [
                     {
                         'output': outputs[0].pk,
+                        'quantity': outputs[0].quantity,
                     },
                     {
                         'output': outputs[1].pk,
+                        'quantity': outputs[1].quantity,
                     },
                     {
                         'output': outputs[2].pk,
+                        'quantity': outputs[2].quantity,
                     },
                 ],
                 'location': 1,