Adds 'consumable' field to BomItem model (#2890)

* Adds 'consumable' field to BomItem model

* Add consumable field to API

* Consumable items always count as "allocated" for a build

* Add new BOM fields to BOM item checksum calculation

* Display 'consumable' status in BOM table

* Fix order of database migrations

* Update unit tests

* Fix for BOM table

* Remove "infinite" field from StockItem model

- Not used anywhere for functionality
- Hidden from the user
- Now replaced by the "consumable" concept in the BuildOrder model

* Update build order allocation table display

* Prevent auto-allocation of stock to consumable BOM items

* Ignore consumable BOM items when allocating stock to a build order

* Reimplmement "footer" row for BOM table

* Fix "can_build" calculation

- Ignore "consumable" BOM items

* Unrelated typo fix

* Tweak BOM table

* More visual tweaks to BOM table

* Add unit test for consumable field

InvenTree/stock/migrations/0088_remove_stockitem_infinite.py

@@ -0,0 +1,17 @@
+# Generated by Django 3.2.15 on 2022-09-22 02:23
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('stock', '0087_auto_20220912_2341'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='stockitem',
+            name='infinite',
+        ),
+    ]

InvenTree/stock/models.py

@@ -224,7 +224,6 @@ class StockItem(InvenTreeBarcodeMixin, MetadataMixin, MPTTModel):
         build: Link to a Build (if this stock item was created from a build)
         is_building: Boolean field indicating if this stock item is currently being built (or is "in production")
         purchase_order: Link to a PurchaseOrder (if this stock item was created from a PurchaseOrder)
-        infinite: If True this StockItem can never be exhausted
         sales_order: Link to a SalesOrder object (if the StockItem has been assigned to a SalesOrder)
         purchase_price: The unit purchase price for this StockItem - this is the unit price at time of purchase (if this item was purchased from an external supplier)
         packaging: Description of how the StockItem is packaged (e.g. "reel", "loose", "tape" etc)
@@ -882,11 +881,6 @@ class StockItem(InvenTreeBarcodeMixin, MetadataMixin, MPTTModel):
 
         self.save()
 
-    # If stock item is incoming, an (optional) ETA field
-    # expected_arrival = models.DateField(null=True, blank=True)
-
-    infinite = models.BooleanField(default=False)
-
     def is_allocated(self):
         """Return True if this StockItem is allocated to a SalesOrder or a Build."""
         # TODO - For now this only checks if the StockItem is allocated to a SalesOrder
@@ -1565,7 +1559,7 @@ class StockItem(InvenTreeBarcodeMixin, MetadataMixin, MPTTModel):
         except InvalidOperation:
             return False
 
-        if count < 0 or self.infinite:
+        if count < 0:
             return False
 
         self.stocktake_date = datetime.now().date()
@@ -1601,7 +1595,7 @@ class StockItem(InvenTreeBarcodeMixin, MetadataMixin, MPTTModel):
             return False
 
         # Ignore amounts that do not make sense
-        if quantity <= 0 or self.infinite:
+        if quantity <= 0:
             return False
 
         if self.updateQuantity(self.quantity + quantity):
@@ -1630,7 +1624,7 @@ class StockItem(InvenTreeBarcodeMixin, MetadataMixin, MPTTModel):
         except InvalidOperation:
             return False
 
-        if quantity <= 0 or self.infinite:
+        if quantity <= 0:
             return False
 
         if self.updateQuantity(self.quantity - quantity):