hub: do not assign tasks to workers with incompatible arches

kobo/hub/xmlrpc/worker.py

@@ -192,7 +192,7 @@ def get_tasks_to_assign(request):
         return task_list
 
     # awaited tasks
-    for task in Task.objects.free().filter(awaited=True).order_by("-priority", "id")[:max_tasks]:
+    for task in Task.objects.free().filter(awaited=True, arch__in=request.worker.arches.all()).order_by("-priority", "id")[:max_tasks]:
         task_info = task.export(flat=False)
         task_list.append(task_info)
 
@@ -210,7 +210,7 @@ def get_tasks_to_assign(request):
     # free tasks for each channel relevant to the worker
     tasks = []
     for channel in request.worker.channels.all():
-        for task in Task.objects.free().filter(awaited=False, channel=channel, priority__gte=request.worker.min_priority).order_by("-priority", "id")[:max_tasks]:
+        for task in Task.objects.free().filter(awaited=False, channel=channel, arch__in=request.worker.arches.all(), priority__gte=request.worker.min_priority).order_by("-priority", "id")[:max_tasks]:
             task_info = task.export(flat=False)
             tasks.append(task_info)
 

tests/test_xmlrpc_worker.py

@@ -747,6 +747,8 @@ def test_update_worker(self):
         self.assertEqual(wi['task_count'], 1)
 
     def test_get_tasks_to_assign(self):
+        new_arch = Arch.objects.create(name='testarch2', pretty_name='testarch2')
+
         for _ in range(2):
             Task.objects.create(
                 worker=self._worker,
@@ -790,6 +792,13 @@ def test_get_tasks_to_assign(self):
                 state=TASK_STATES['CLOSED'],
             )
 
+            # task with an incompatible architecture
+            Task.objects.create(
+                arch=new_arch,
+                channel=self._channel,
+                owner=self._user,
+            )
+
         req = _make_request(self._worker)
         tasks = worker.get_tasks_to_assign(req)