[bug] Remove 'project_code' from optional fields (#10646)

* Remove 'project_code' from optional fields

- enable_filter overrides field options
- Field does not auto-describe as a related field any more
- Breaks front-end forms

* Unit tests

* Include fix for currency

- Ref: https://github.com/inventree/InvenTree/pull/10645

* Cleanup import

* Adjust unit tests

src/backend/InvenTree/build/serializers.py

@@ -33,7 +33,6 @@ from generic.states.fields import InvenTreeCustomStatusSerializerMixin
 from InvenTree.mixins import DataImportExportSerializerMixin
 from InvenTree.serializers import (
     FilterableCharField,
-    FilterableIntegerField,
     FilterableSerializerMixin,
     InvenTreeDecimalField,
     InvenTreeModelSerializer,
@@ -164,17 +163,6 @@ class BuildSerializer(
         filter_name='project_code_detail',
     )
 
-    project_code = enable_filter(
-        FilterableIntegerField(
-            allow_null=True,
-            required=False,
-            label=_('Project Code'),
-            help_text=_('Project code for this build order'),
-        ),
-        True,
-        filter_name='project_code_detail',
-    )
-
     @staticmethod
     def annotate_queryset(queryset):
         """Add custom annotations to the BuildSerializer queryset, performing database queries as efficiently as possible.

src/backend/InvenTree/build/test_api.py

@@ -1086,6 +1086,51 @@ class BuildListTest(BuildAPITest):
 
     url = reverse('api-build-list')
 
+    def test_api_options(self):
+        """Test OPTIONS endpoint for the Build list API."""
+        data = self.options(self.url, expected_code=200).data
+
+        self.assertEqual(data['name'], 'Build List')
+        actions = data['actions']['POST']
+
+        for field_name in [
+            'pk',
+            'title',
+            'part',
+            'part_detail',
+            'project_code',
+            'project_code_detail',
+            'quantity',
+        ]:
+            self.assertIn(field_name, actions)
+
+        # Specific checks for certain fields
+        for field_name in ['part', 'project_code', 'take_from']:
+            field = actions[field_name]
+            self.assertEqual(field['type'], 'related field')
+
+            for key in ['model', 'api_url', 'pk_field']:
+                self.assertIn(key, field)
+
+    def test_detail_fields(self):
+        """Test inclusion of detail fields."""
+        # Test without extra detail fields
+        for val in [True, False]:
+            response = self.get(
+                self.url,
+                data={'part_detail': val, 'project_code_detail': val, 'limit': 1},
+                expected_code=200,
+            )
+
+            data = response.data['results'][0]
+
+            if val:
+                self.assertIn('part_detail', data)
+                self.assertIn('project_code_detail', data)
+            else:
+                self.assertNotIn('part_detail', data)
+                self.assertNotIn('project_code_detail', data)
+
     def test_get_all_builds(self):
         """Retrieve *all* builds via the API."""
         builds = self.get(self.url)
@@ -1195,7 +1240,6 @@ class BuildListTest(BuildAPITest):
             self.url,
             [
                 'part_detail',
-                ('project_code_detail', 'project_code'),
                 'project_code_detail',
                 ('user_detail', 'responsible_detail'),
                 ('user_detail', 'issued_by_detail'),

src/backend/InvenTree/common/currency.py

@@ -11,7 +11,6 @@ import structlog
 from moneyed import CURRENCIES
 
 import InvenTree.helpers
-import InvenTree.ready
 
 logger = structlog.get_logger('inventree')
 
@@ -20,9 +19,6 @@ def currency_code_default(create: bool = True):
     """Returns the default currency code (or USD if not specified)."""
     from common.settings import get_global_setting
 
-    if InvenTree.ready.isRunningMigrations():
-        return ''  # pragma: no cover
-
     try:
         code = get_global_setting(
             'INVENTREE_DEFAULT_CURRENCY', create=create, cache=True