Add 'active' field to the ProjectCode model

- Allows retiring of old project codes without deleting

src/backend/InvenTree/common/admin.py

@@ -115,7 +115,8 @@ class BarcodeScanResultAdmin(admin.ModelAdmin):
 class ProjectCodeAdmin(admin.ModelAdmin):
     """Admin settings for ProjectCode."""
 
-    list_display = ('code', 'description')
+    list_display = ('code', 'description', 'active')
+    list_filter = ('active',)
 
     search_fields = ('code', 'description')
 

src/backend/InvenTree/common/api.py

@@ -491,7 +491,7 @@ class ProjectCodeList(DataExportViewMixin, ListCreateAPI):
     filter_backends = SEARCH_ORDER_FILTER
 
     ordering_fields = ['code']
-
+    filterset_fields = ['active']
     search_fields = ['code', 'description']
 
 

src/backend/InvenTree/common/migrations/0045_projectcode_active.py

@@ -0,0 +1,22 @@
+# Generated by Django 5.2.15 on 2026-06-25 03:13
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("common", "0044_notificationmessage_charfield_pk"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="projectcode",
+            name="active",
+            field=models.BooleanField(
+                default=True,
+                help_text="Is this project code active?",
+                verbose_name="Active",
+            ),
+        ),
+    ]

src/backend/InvenTree/common/models.py

@@ -181,6 +181,12 @@ class ProjectCode(InvenTree.models.InvenTreeMetadataModel):
         help_text=_('Project description'),
     )
 
+    active = models.BooleanField(
+        default=True,
+        verbose_name=_('Active'),
+        help_text=_('Is this project code active?'),
+    )
+
     responsible = models.ForeignKey(
         users.models.Owner,
         on_delete=models.SET_NULL,

src/backend/InvenTree/common/serializers.py

@@ -417,7 +417,14 @@ class ProjectCodeSerializer(DataImportExportSerializerMixin, InvenTreeModelSeria
         """Meta options for ProjectCodeSerializer."""
 
         model = common_models.ProjectCode
-        fields = ['pk', 'code', 'description', 'responsible', 'responsible_detail']
+        fields = [
+            'pk',
+            'code',
+            'description',
+            'active',
+            'responsible',
+            'responsible_detail',
+        ]
 
     responsible_detail = OwnerSerializer(
         source='responsible', read_only=True, allow_null=True