Allocations should be unique by project & resource

coldfront/core/allocation/test_views.py

@@ -590,6 +590,32 @@ def test_allocationcreateview_post_zeroquantity(self):
         self.assertContains(response, "Allocation requested.")
         self.assertEqual(len(self.project.allocation_set.all()), 2)
 
+    def test_allocationcreateview_post_duplicate_project_resource_shows_error(self):
+        """Posting an allocation for same project+resource should show error and not create a new allocation"""
+        self.post_data["resource"] = str(self.resource_tandon.pk)
+
+        # Create an existing allocation for (project, resource_tandon)
+        existing = Allocation.objects.create(
+            project=self.project,
+            justification="existing",
+            quantity=1,
+            status=AllocationStatusChoice.objects.get(name="New"),
+        )
+        existing.resources.add(self.resource_tandon)
+
+        initial_count = self.project.allocation_set.count()
+
+        response = self.client.post(self.url, data=self.post_data, follow=True)
+
+        self.assertEqual(response.status_code, 200)
+        # Should not create a new allocation
+        self.assertEqual(self.project.allocation_set.count(), initial_count)
+
+        # Should show the friendly error message you added in form_valid
+        self.assertContains(
+            response,
+            "An allocation for this project and resource already exists.",
+        )
 
 class AllocationAddUsersViewTest(AllocationViewBaseTest):
     """Tests for the AllocationAddUsersView"""

coldfront/core/allocation/views.py

@@ -80,6 +80,7 @@
 import plotly.express as px
 from plotly.offline import plot
 from django.http import HttpResponse, HttpResponseBadRequest
+from django.db import IntegrityError, transaction
 
 ALLOCATION_ENABLE_ALLOCATION_RENEWAL = import_from_settings(
     "ALLOCATION_ENABLE_ALLOCATION_RENEWAL", True
@@ -690,6 +691,14 @@ def form_valid(self, form):
             )
             return self.form_invalid(form)
 
+        # Prevent duplicate allocation for same (project, resource)
+        if Allocation.objects.filter(project=project_obj, resources=resource_obj).exists():
+            form.add_error(
+                "resource",
+                "An allocation for this project and resource already exists.",
+            )
+            return self.form_invalid(form)
+
         usernames = form_data.get("users")
         usernames.append(project_obj.pi.username)
         usernames = list(set(usernames))

coldfront/core/utils/management/commands/load_test_data.py

@@ -269,43 +269,7 @@ def handle(self, *args, **options):
         start_date = datetime.datetime.now()
         end_date = datetime.datetime.now() + relativedelta(days=365)
 
-        # Add PI cluster
-        allocation_obj, _ = Allocation.objects.get_or_create(
-            project=project_obj,
-            status=AllocationStatusChoice.objects.get(name="Active"),
-            start_date=start_date,
-            end_date=end_date,
-            is_changeable=True,
-            justification="I need access to my nodes.",
-        )
-
-        allocation_obj.resources.add(Resource.objects.get(name="Tandon"))
-        allocation_obj.save()
-
-        allocation_attribute_type_obj = AllocationAttributeType.objects.get(
-            name="slurm_account_name"
-        )
-        AllocationAttribute.objects.get_or_create(
-            allocation_attribute_type=allocation_attribute_type_obj,
-            allocation=allocation_obj,
-            value=f"torch_pr_{allocation_obj.project.pk}_Tandon",
-        )
-
-        allocation_attribute_type_obj = AllocationAttributeType.objects.get(
-            name="slurm_user_specs"
-        )
-        AllocationAttribute.objects.get_or_create(
-            allocation_attribute_type=allocation_attribute_type_obj,
-            allocation=allocation_obj,
-            value="Fairshare=parent",
-        )
-
-        allocation_user_obj = AllocationUser.objects.create(
-            allocation=allocation_obj,
-            user=pi1,
-            status=AllocationUserStatusChoice.objects.get(name="Active"),
-        )
-        # Add university cluster
+        # Add university allocation
         allocation_obj, _ = Allocation.objects.get_or_create(
             project=project_obj,
             status=AllocationStatusChoice.objects.get(name="Active"),
@@ -363,41 +327,13 @@ def handle(self, *args, **options):
             value="2022-01-01",
         )
 
-        allocation_user_obj = AllocationUser.objects.create(
-            allocation=allocation_obj,
-            user=pi1,
-            status=AllocationUserStatusChoice.objects.get(name="Active"),
-        )
-        # Add project storage
-        allocation_obj, _ = Allocation.objects.get_or_create(
-            project=project_obj,
-            status=AllocationStatusChoice.objects.get(name="Active"),
-            start_date=start_date,
-            end_date=end_date,
-            quantity=10,
-            is_changeable=True,
-            justification="I need extra storage.",
-        )
-
-        allocation_obj.resources.add(Resource.objects.get(name="Tandon"))
-        allocation_obj.save()
-
-        allocation_attribute_type_obj = AllocationAttributeType.objects.get(
-            name="slurm_account_name"
-        )
-        AllocationAttribute.objects.get_or_create(
-            allocation_attribute_type=allocation_attribute_type_obj,
-            allocation=allocation_obj,
-            value=f"torch_pr_{allocation_obj.project.pk}_Tandon",
-        )
-
         allocation_user_obj = AllocationUser.objects.create(
             allocation=allocation_obj,
             user=pi1,
             status=AllocationUserStatusChoice.objects.get(name="Active"),
         )
 
-        # Add metered allocation
+        # Add Tandon allocation
         allocation_obj, _ = Allocation.objects.get_or_create(
             project=project_obj,
             status=AllocationStatusChoice.objects.get(name="Active"),