[fix] Fixed MultiValueDictKeyError on empty device form submission #1057

Fixes #1057

---------

Co-authored-by: Gagan Deep <pandafy.dev@gmail.com>
Co-authored-by: Federico Capoano <f.capoano@openwisp.io>

Author: 3 people

openwisp_controller/config/admin.py

@@ -352,10 +352,13 @@ def get_temp_model_instance(self, **options):
         config_model = self.Meta.model
         instance = config_model(**options)
         device_model = config_model.device.field.related_model
-        org = Organization.objects.get(pk=self.data["organization"])
+        if not (org_id := self.data.get("organization")):
+            # We cannot validate the templates without an organization.
+            return
+        org = Organization.objects.get(pk=org_id)
         instance.device = device_model(
-            name=self.data["name"],
-            mac_address=self.data["mac_address"],
+            name=self.data.get("name", ""),
+            mac_address=self.data.get("mac_address", ""),
             organization=org,
         )
         return instance
@@ -369,6 +372,12 @@ def clean_templates(self):
             # when adding self.instance is empty, we need to create a
             # temporary instance that we'll use just for validation
             config = self.get_temp_model_instance(**data)
+            if not config:
+                # The request does not contain vaild data to create a temporary
+                # Device instance. Thus, we cannot validate the templates.
+                # The Device validation will be handled by DeviceAdmin.
+                # Therefore, we don't need to raise any error here.
+                return
         else:
             config = self.instance
         if config.backend and templates:

openwisp_controller/config/tests/test_admin.py

@@ -2279,6 +2279,36 @@ def test_templates_fetch_queries_10(self):
         config = self._create_config(organization=self._get_org())
         self._verify_template_queries(config, 10)
 
+    def test_empty_device_form_with_config_inline(self):
+        org = self._get_org()
+        template = self._create_template(organization=org)
+        path = reverse(f"admin:{self.app_label}_device_add")
+        # Submit form without required device fields but with config inline
+        # This reproduces the scenario where user clicks "Add another Configuration"
+        # and submits without filling device details
+        params = {
+            "config-0-backend": "netjsonconfig.OpenWrt",
+            "config-0-templates": str(template.pk),
+            "config-0-config": json.dumps({}),
+            "config-0-context": "",
+            "config-TOTAL_FORMS": 1,
+            "config-INITIAL_FORMS": 0,
+            "config-MIN_NUM_FORMS": 0,
+            "config-MAX_NUM_FORMS": 1,
+            "deviceconnection_set-TOTAL_FORMS": 0,
+            "deviceconnection_set-INITIAL_FORMS": 0,
+            "deviceconnection_set-MIN_NUM_FORMS": 0,
+            "deviceconnection_set-MAX_NUM_FORMS": 1000,
+            "command_set-TOTAL_FORMS": 0,
+            "command_set-INITIAL_FORMS": 0,
+            "command_set-MIN_NUM_FORMS": 0,
+            "command_set-MAX_NUM_FORMS": 1000,
+        }
+        response = self.client.post(path, params)
+        self.assertEqual(response.status_code, 200)
+        self.assertContains(response, "errorlist")
+        self.assertEqual(Device.objects.count(), 0)
+
 
 class TestTransactionAdmin(
     CreateConfigTemplateMixin,