Add Metadata to more models (#4898)

* Update models: add MetadataMixin

* Fix name of model in Metadata API definition

* Add API endpoints

* Update API version

* Fix syntax

* Add API endpoint for RO, RO line, RO line extra item

* Add Metadata to Contacts

* Fix link in API version

* Fix name of model

* Fix error?

* Fix error?

* Fix all errors, hopefully..

* Add tests for order, line, extraline metadata

Extend for PO, SO

* Add tests for metadata for Company-related models

* Fix spelling

* Consolidate metadata test for all part models into one test

* Add test for all Stock metadata

* Update stock test_api

* Add all metadata tests for orders

* Fix various errors in tests

* Fix model name

* Add migration files

* Update tests for metadata

* Resolve conflict around API version number

* Rename migration file

* Rename migration file

* Will Contact edit endpoint work better?

* Revert changes in URL definitions

* Remove test, duplicate

* Fix tests with fixed PK, not from fixtures, to use a dynamic PK

* Fix migration overlap

InvenTree/company/test_api.py

@@ -6,7 +6,7 @@ from rest_framework import status
 
 from InvenTree.unit_test import InvenTreeAPITestCase
 
-from .models import Company, Contact, SupplierPart
+from .models import Company, Contact, ManufacturerPart, SupplierPart
 
 
 class CompanyTest(InvenTreeAPITestCase):
@@ -233,7 +233,10 @@ class ContactTest(InvenTreeAPITestCase):
     def test_edit(self):
         """Test that we can edit a Contact via the API"""
 
-        url = reverse('api-contact-detail', kwargs={'pk': 1})
+        # Get the first contact
+        contact = Contact.objects.first()
+        # Use this contact in the tests
+        url = reverse('api-contact-detail', kwargs={'pk': contact.pk})
 
         # Retrieve detail view
         data = self.get(url, expected_code=200).data
@@ -259,13 +262,16 @@ class ContactTest(InvenTreeAPITestCase):
             expected_code=200
         )
 
-        contact = Contact.objects.get(pk=1)
+        # Get the contact again
+        contact = Contact.objects.first()
         self.assertEqual(contact.role, 'x')
 
     def test_delete(self):
         """Tests that we can delete a Contact via the API"""
 
-        url = reverse('api-contact-detail', kwargs={'pk': 6})
+        # Get the last contact
+        contact = Contact.objects.first()
+        url = reverse('api-contact-detail', kwargs={'pk': contact.pk})
 
         # Delete (without required permissions)
         self.delete(url, expected_code=403)
@@ -490,3 +496,63 @@ class SupplierPartTest(InvenTreeAPITestCase):
         sp = SupplierPart.objects.get(pk=response.data['pk'])
         self.assertEqual(sp.available, 999)
         self.assertIsNotNone(sp.availability_updated)
+
+
+class CompanyMetadataAPITest(InvenTreeAPITestCase):
+    """Unit tests for the various metadata endpoints of API."""
+
+    fixtures = [
+        'category',
+        'part',
+        'location',
+        'company',
+        'contact',
+        'manufacturer_part',
+        'supplier_part',
+    ]
+
+    roles = [
+        'company.change',
+        'purchase_order.change',
+        'part.change',
+    ]
+
+    def metatester(self, apikey, model):
+        """Generic tester"""
+
+        modeldata = model.objects.first()
+
+        # Useless test unless a model object is found
+        self.assertIsNotNone(modeldata)
+
+        url = reverse(apikey, kwargs={'pk': modeldata.pk})
+
+        # Metadata is initially null
+        self.assertIsNone(modeldata.metadata)
+
+        numstr = f'12{len(apikey)}'
+
+        self.patch(
+            url,
+            {
+                'metadata': {
+                    f'abc-{numstr}': f'xyz-{apikey}-{numstr}',
+                }
+            },
+            expected_code=200
+        )
+
+        # Refresh
+        modeldata.refresh_from_db()
+        self.assertEqual(modeldata.get_metadata(f'abc-{numstr}'), f'xyz-{apikey}-{numstr}')
+
+    def test_metadata(self):
+        """Test all endpoints"""
+
+        for apikey, model in {
+            'api-manufacturer-part-metadata': ManufacturerPart,
+            'api-supplier-part-metadata': SupplierPart,
+            'api-company-metadata': Company,
+            'api-contact-metadata': Contact,
+        }.items():
+            self.metatester(apikey, model)