Barcode Refactor (#3640)

* define a simple model mixin class for barcode

* Adds generic function for assigning a barcode to a model instance

* StockItem model now implements the BarcodeMixin class

* Implement simple unit tests for new code

* Fix unit tests

* Data migration for uid field

* Remove references to old 'uid' field

* Migration for removing old uid field from StockItem model

* Bump API version

* Change lookup_barcode to be a classmethod

* Change barcode_model_type to be a class method

* Cleanup for generic barcode scan and assign API:

- Raise ValidationError as appropriate
- Improved unit testing
- Groundwork for future generic implementation

* Further unit tests for barcode scanning

* Adjust error messages for compatibility

* Unit test fix

* Fix hash_barcode function

- Add unit tests to ensure it produces the same results as before the refactor

* Add BarcodeMixin to Part model

* Remove old format_barcode function from Part model

* Further fixes for unit tests

* Add support for assigning arbitrary barcode to Part instance

- Simplify barcode API
- Add more unit tests

* More unit test fixes

* Update unit test

* Adds generic endpoint for unassigning barcode data

* Update web dialog for unlinking a barcode

* Template cleanup

* Add Barcode mixin to StockLocation class

* Add some simple unit tests for new model mixin

* Support assigning / unassigning barcodes for StockLocation

* remove failing outdated test

* Update template to integrate new barcode support for StockLocation

* Add BarcodeMixin to SupplierPart model

* Adds QR code view for SupplierPart

* Major simplification of barcode API endpoints

- Separate existing barcode plugin into two separate classes
- Simplify and consolidate the response from barcode scanning
- Update unit testing

* Yet more unit test fixes

* Yet yet more unit test fixes

InvenTree/part/models.py

@@ -43,7 +43,7 @@ from InvenTree import helpers, validators
 from InvenTree.fields import InvenTreeNotesField, InvenTreeURLField
 from InvenTree.helpers import decimal2money, decimal2string, normalize
 from InvenTree.models import (DataImportMixin, InvenTreeAttachment,
-                              InvenTreeTree)
+                              InvenTreeBarcodeMixin, InvenTreeTree)
 from InvenTree.status_codes import (BuildStatus, PurchaseOrderStatus,
                                     SalesOrderStatus)
 from order import models as OrderModels
@@ -300,7 +300,7 @@ class PartManager(TreeManager):
 
 
 @cleanup.ignore
-class Part(MetadataMixin, MPTTModel):
+class Part(InvenTreeBarcodeMixin, MetadataMixin, MPTTModel):
     """The Part object represents an abstract part, the 'concept' of an actual entity.
 
     An actual physical instance of a Part is a StockItem which is treated separately.
@@ -941,18 +941,6 @@ class Part(MetadataMixin, MPTTModel):
 
     responsible = models.ForeignKey(User, on_delete=models.SET_NULL, blank=True, null=True, verbose_name=_('Responsible'), related_name='parts_responible')
 
-    def format_barcode(self, **kwargs):
-        """Return a JSON string for formatting a barcode for this Part object."""
-        return helpers.MakeBarcode(
-            "part",
-            self.id,
-            {
-                "name": self.full_name,
-                "url": reverse('api-part-detail', kwargs={'pk': self.id}),
-            },
-            **kwargs
-        )
-
     @property
     def category_path(self):
         """Return the category path of this Part instance"""