Merge pull request #4315 from netbox-community/4195-application-logging

Closes #4195: Application logging

docs/configuration/optional-settings.md

@@ -183,6 +183,14 @@ LOGGING = {
 }
 ```
 
+### Available Loggers
+
+* `netbox.auth.*` - Authentication events
+* `netbox.api.views.*` - Views which handle business logic for the REST API
+* `netbox.reports.*` - Report execution (`module.name`)
+* `netbox.scripts.*` - Custom script execution (`module.name`)
+* `netbox.views.*` - Views which handle business logic for the web UI
+
 ---
 
 ## LOGIN_REQUIRED

docs/release-notes/version-2.8.md

@@ -1,5 +1,9 @@
 # v2.8.0 (FUTURE)
 
+## Enhancements
+
+* [#4195](https://github.com/netbox-community/netbox/issues/4195) - Enabled application logging (see [logging configuration](../configuration/optional-settings.md#logging))
+
 ## API Changes
 
 * dcim.Rack: The `/api/dcim/racks/<pk>/units/` endpoint has been replaced with `/api/dcim/racks/<pk>/elevation/`.

mkdocs.yml

@@ -63,6 +63,7 @@ nav:
         - Release Checklist: 'development/release-checklist.md'
         - Squashing Migrations: 'development/squashing-migrations.md'
     - Release Notes:
+        - Version 2.8: 'release-notes/version-2.8.md'
         - Version 2.7: 'release-notes/version-2.7.md'
         - Version 2.6: 'release-notes/version-2.6.md'
         - Version 2.5: 'release-notes/version-2.5.md'

netbox/extras/reports.py

@@ -1,5 +1,6 @@
 import importlib
 import inspect
+import logging
 import pkgutil
 from collections import OrderedDict
 
@@ -91,6 +92,8 @@ class Report(object):
         self.active_test = None
         self.failed = False
 
+        self.logger = logging.getLogger(f"netbox.reports.{self.module}.{self.name}")
+
         # Compile test methods and initialize results skeleton
         test_methods = []
         for method in dir(self):
@@ -138,6 +141,7 @@ class Report(object):
         Log a message which is not associated with a particular object.
         """
         self._log(None, message, level=LOG_DEFAULT)
+        self.logger.info(message)
 
     def log_success(self, obj, message=None):
         """
@@ -146,6 +150,7 @@ class Report(object):
         if message:
             self._log(obj, message, level=LOG_SUCCESS)
         self._results[self.active_test]['success'] += 1
+        self.logger.info(f"Success | {obj}: {message}")
 
     def log_info(self, obj, message):
         """
@@ -153,6 +158,7 @@ class Report(object):
         """
         self._log(obj, message, level=LOG_INFO)
         self._results[self.active_test]['info'] += 1
+        self.logger.info(f"Info | {obj}: {message}")
 
     def log_warning(self, obj, message):
         """
@@ -160,6 +166,7 @@ class Report(object):
         """
         self._log(obj, message, level=LOG_WARNING)
         self._results[self.active_test]['warning'] += 1
+        self.logger.info(f"Warning | {obj}: {message}")
 
     def log_failure(self, obj, message):
         """
@@ -167,12 +174,15 @@ class Report(object):
         """
         self._log(obj, message, level=LOG_FAILURE)
         self._results[self.active_test]['failure'] += 1
+        self.logger.info(f"Failure | {obj}: {message}")
         self.failed = True
 
     def run(self):
         """
         Run the report and return its results. Each test method will be executed in order.
         """
+        self.logger.info(f"Running report")
+
         for method_name in self.test_methods:
             self.active_test = method_name
             test_method = getattr(self, method_name)
@@ -184,6 +194,11 @@ class Report(object):
         result.save()
         self.result = result
 
+        if self.failed:
+            self.logger.warning("Report failed")
+        else:
+            self.logger.info("Report completed successfully")
+
         # Perform any post-run tasks
         self.post_run()
 

netbox/extras/scripts.py

@@ -1,5 +1,6 @@
 import inspect
 import json
+import logging
 import os
 import pkgutil
 import time
@@ -254,6 +255,7 @@ class BaseScript:
     def __init__(self):
 
         # Initiate the log
+        self.logger = logging.getLogger(f"netbox.scripts.{self.module()}.{self.__class__.__name__}")
         self.log = []
 
         # Declare the placeholder for the current request
@@ -301,18 +303,23 @@ class BaseScript:
     # Logging
 
     def log_debug(self, message):
+        self.logger.log(logging.DEBUG, message)
         self.log.append((LOG_DEFAULT, message))
 
     def log_success(self, message):
+        self.logger.log(logging.INFO, message)  # No syslog equivalent for SUCCESS
         self.log.append((LOG_SUCCESS, message))
 
     def log_info(self, message):
+        self.logger.log(logging.INFO, message)
         self.log.append((LOG_INFO, message))
 
     def log_warning(self, message):
+        self.logger.log(logging.WARNING, message)
         self.log.append((LOG_WARNING, message))
 
     def log_failure(self, message):
+        self.logger.log(logging.ERROR, message)
         self.log.append((LOG_FAILURE, message))
 
     # Convenience functions
@@ -375,6 +382,10 @@ def run_script(script, data, request, commit=True):
     start_time = None
     end_time = None
 
+    script_name = script.__class__.__name__
+    logger = logging.getLogger(f"netbox.scripts.{script.module()}.{script_name}")
+    logger.info(f"Running script (commit={commit})")
+
     # Add files to form data
     files = request.FILES
     for field_name, fileobj in files.items():
@@ -404,6 +415,7 @@ def run_script(script, data, request, commit=True):
         script.log_failure(
             "An exception occurred: `{}: {}`\n```\n{}\n```".format(type(e).__name__, e, stacktrace)
         )
+        logger.error(f"Exception raised during script execution: {e}")
         commit = False
     finally:
         if not commit:
@@ -416,6 +428,7 @@ def run_script(script, data, request, commit=True):
     # Calculate execution time
     if end_time is not None:
         execution_time = end_time - start_time
+        logger.info(f"Script completed in {execution_time:.4f} seconds")
     else:
         execution_time = None
 

netbox/users/views.py

@@ -1,3 +1,5 @@
+import logging
+
 from django.conf import settings
 from django.contrib import messages
 from django.contrib.auth import login as auth_login, logout as auth_logout, update_session_auth_hash
@@ -24,6 +26,9 @@ from .models import Token
 #
 
 class LoginView(View):
+    """
+    Perform user authentication via the web UI.
+    """
     template_name = 'login.html'
 
     @method_decorator(sensitive_post_parameters('password'))
@@ -38,36 +43,51 @@ class LoginView(View):
         })
 
     def post(self, request):
+        logger = logging.getLogger('netbox.auth.login')
         form = LoginForm(request, data=request.POST)
+
         if form.is_valid():
+            logger.debug("Login form validation was successful")
 
             # Determine where to direct user after successful login
-            redirect_to = request.POST.get('next', '')
+            redirect_to = request.POST.get('next')
-            if not is_safe_url(url=redirect_to, allowed_hosts=request.get_host()):
+            if redirect_to and not is_safe_url(url=redirect_to, allowed_hosts=request.get_host()):
+                logger.warning(f"Ignoring unsafe 'next' URL passed to login form: {redirect_to}")
                 redirect_to = reverse('home')
 
             # If maintenance mode is enabled, assume the database is read-only, and disable updating the user's
             # last_login time upon authentication.
             if settings.MAINTENANCE_MODE:
+                logger.warning("Maintenance mode enabled: disabling update of most recent login time")
                 user_logged_in.disconnect(update_last_login, dispatch_uid='update_last_login')
 
             # Authenticate user
             auth_login(request, form.get_user())
+            logger.info(f"User {request.user} successfully authenticated")
             messages.info(request, "Logged in as {}.".format(request.user))
 
+            logger.debug(f"Redirecting user to {redirect_to}")
             return HttpResponseRedirect(redirect_to)
 
+        else:
+            logger.debug("Login form validation failed")
+
         return render(request, self.template_name, {
             'form': form,
         })
 
 
 class LogoutView(View):
-
+    """
+    Deauthenticate a web user.
+    """
     def get(self, request):
+        logger = logging.getLogger('netbox.auth.logout')
 
         # Log out the user
+        username = request.user
         auth_logout(request)
+        logger.info(f"User {username} has logged out")
         messages.info(request, "You have logged out.")
 
         # Delete session key cookie (if set) upon logout

netbox/utilities/api.py

@@ -1,3 +1,4 @@
+import logging
 from collections import OrderedDict
 
 import pytz
@@ -303,25 +304,35 @@ class ModelViewSet(_ModelViewSet):
         return super().get_serializer(*args, **kwargs)
 
     def get_serializer_class(self):
+        logger = logging.getLogger('netbox.api.views.ModelViewSet')
 
         # If 'brief' has been passed as a query param, find and return the nested serializer for this model, if one
         # exists
         request = self.get_serializer_context()['request']
-        if request.query_params.get('brief', False):
+        if request.query_params.get('brief'):
+            logger.debug("Request is for 'brief' format; initializing nested serializer")
             try:
-                return get_serializer_for_model(self.queryset.model, prefix='Nested')
+                serializer = get_serializer_for_model(self.queryset.model, prefix='Nested')
+                logger.debug(f"Using serializer {serializer}")
+                return serializer
             except SerializerNotFound:
                 pass
 
         # Fall back to the hard-coded serializer class
+        logger.debug(f"Using serializer {self.serializer_class}")
         return self.serializer_class
 
     def dispatch(self, request, *args, **kwargs):
+        logger = logging.getLogger('netbox.api.views.ModelViewSet')
+
         try:
             return super().dispatch(request, *args, **kwargs)
         except ProtectedError as e:
-            models = ['{} ({})'.format(o, o._meta) for o in e.protected_objects.all()]
+            models = [
+                '{} ({})'.format(o, o._meta) for o in e.protected_objects.all()
+            ]
             msg = 'Unable to delete object. The following dependent objects were found: {}'.format(', '.join(models))
+            logger.warning(msg)
             return self.finalize_response(
                 request,
                 Response({'detail': msg}, status=409),
@@ -341,6 +352,26 @@ class ModelViewSet(_ModelViewSet):
         """
         return super().retrieve(*args, **kwargs)
 
+    #
+    # Logging
+    #
+
+    def perform_create(self, serializer):
+        model = serializer.child.Meta.model if hasattr(serializer, 'many') else serializer.Meta.model
+        logger = logging.getLogger('netbox.api.views.ModelViewSet')
+        logger.info(f"Creating new {model._meta.verbose_name}")
+        return super().perform_create(serializer)
+
+    def perform_update(self, serializer):
+        logger = logging.getLogger('netbox.api.views.ModelViewSet')
+        logger.info(f"Updating {serializer.instance} (PK: {serializer.instance.pk})")
+        return super().perform_update(serializer)
+
+    def perform_destroy(self, instance):
+        logger = logging.getLogger('netbox.api.views.ModelViewSet')
+        logger.info(f"Deleting {instance} (PK: {instance.pk})")
+        return super().perform_destroy(instance)
+
 
 class FieldChoicesViewSet(ViewSet):
     """

netbox/utilities/views.py

@@ -1,3 +1,4 @@
+import logging
 import sys
 from copy import deepcopy
 
@@ -219,35 +220,36 @@ class ObjectEditView(GetReturnURLMixin, View):
         # given some parameter from the request URL.
         return obj
 
-    def get(self, request, *args, **kwargs):
+    def dispatch(self, request, *args, **kwargs):
+        self.obj = self.alter_obj(self.get_object(kwargs), request, args, kwargs)
 
-        obj = self.get_object(kwargs)
+        return super().dispatch(request, *args, **kwargs)
-        obj = self.alter_obj(obj, request, args, kwargs)
+
+    def get(self, request, *args, **kwargs):
         # Parse initial data manually to avoid setting field values as lists
         initial_data = {k: request.GET[k] for k in request.GET}
-        form = self.model_form(instance=obj, initial=initial_data)
+        form = self.model_form(instance=self.obj, initial=initial_data)
 
         return render(request, self.template_name, {
-            'obj': obj,
+            'obj': self.obj,
             'obj_type': self.model._meta.verbose_name,
             'form': form,
-            'return_url': self.get_return_url(request, obj),
+            'return_url': self.get_return_url(request, self.obj),
         })
 
     def post(self, request, *args, **kwargs):
-
+        logger = logging.getLogger('netbox.views.ObjectEditView')
-        obj = self.get_object(kwargs)
+        form = self.model_form(request.POST, request.FILES, instance=self.obj)
-        obj = self.alter_obj(obj, request, args, kwargs)
-        form = self.model_form(request.POST, request.FILES, instance=obj)
 
         if form.is_valid():
-            obj_created = not form.instance.pk
+            logger.debug("Form validation was successful")
-            obj = form.save()
 
+            obj = form.save()
             msg = '{} {}'.format(
-                'Created' if obj_created else 'Modified',
+                'Created' if not form.instance.pk else 'Modified',
                 self.model._meta.verbose_name
             )
+            logger.info(f"{msg} {obj} (PK: {obj.pk})")
             if hasattr(obj, 'get_absolute_url'):
                 msg = '{} <a href="{}">{}</a>'.format(msg, obj.get_absolute_url(), escape(obj))
             else:
@@ -269,11 +271,14 @@ class ObjectEditView(GetReturnURLMixin, View):
             else:
                 return redirect(self.get_return_url(request, obj))
 
+        else:
+            logger.debug("Form validation failed")
+
         return render(request, self.template_name, {
-            'obj': obj,
+            'obj': self.obj,
             'obj_type': self.model._meta.verbose_name,
             'form': form,
-            'return_url': self.get_return_url(request, obj),
+            'return_url': self.get_return_url(request, self.obj),
         })
 
 
@@ -295,7 +300,6 @@ class ObjectDeleteView(GetReturnURLMixin, View):
             return get_object_or_404(self.model, pk=kwargs['pk'])
 
     def get(self, request, **kwargs):
-
         obj = self.get_object(kwargs)
         form = ConfirmationForm(initial=request.GET)
 
@@ -307,18 +311,22 @@ class ObjectDeleteView(GetReturnURLMixin, View):
         })
 
     def post(self, request, **kwargs):
-
+        logger = logging.getLogger('netbox.views.ObjectDeleteView')
         obj = self.get_object(kwargs)
         form = ConfirmationForm(request.POST)
+
         if form.is_valid():
+            logger.debug("Form validation was successful")
 
             try:
                 obj.delete()
             except ProtectedError as e:
+                logger.info("Caught ProtectedError while attempting to delete object")
                 handle_protectederror(obj, request, e)
                 return redirect(obj.get_absolute_url())
 
             msg = 'Deleted {} {}'.format(self.model._meta.verbose_name, obj)
+            logger.info(msg)
             messages.success(request, msg)
 
             return_url = form.cleaned_data.get('return_url')
@@ -327,6 +335,9 @@ class ObjectDeleteView(GetReturnURLMixin, View):
             else:
                 return redirect(self.get_return_url(request, obj))
 
+        else:
+            logger.debug("Form validation failed")
+
         return render(request, self.template_name, {
             'obj': obj,
             'form': form,
@@ -350,7 +361,6 @@ class BulkCreateView(GetReturnURLMixin, View):
     template_name = None
 
     def get(self, request):
-
         # Set initial values for visible form fields from query args
         initial = {}
         for field in getattr(self.model_form._meta, 'fields', []):
@@ -368,13 +378,13 @@ class BulkCreateView(GetReturnURLMixin, View):
         })
 
     def post(self, request):
-
+        logger = logging.getLogger('netbox.views.BulkCreateView')
         model = self.model_form._meta.model
         form = self.form(request.POST)
         model_form = self.model_form(request.POST)
 
         if form.is_valid():
-
+            logger.debug("Form validation was successful")
             pattern = form.cleaned_data['pattern']
             new_objs = []
 
@@ -392,6 +402,7 @@ class BulkCreateView(GetReturnURLMixin, View):
                         # Validate each new object independently.
                         if model_form.is_valid():
                             obj = model_form.save()
+                            logger.debug(f"Created {obj} (PK: {obj.pk})")
                             new_objs.append(obj)
                         else:
                             # Copy any errors on the pattern target field to the pattern form.
@@ -403,6 +414,7 @@ class BulkCreateView(GetReturnURLMixin, View):
 
                     # If we make it to this point, validation has succeeded on all new objects.
                     msg = "Added {} {}".format(len(new_objs), model._meta.verbose_name_plural)
+                    logger.info(msg)
                     messages.success(request, msg)
 
                     if '_addanother' in request.POST:
@@ -412,6 +424,9 @@ class BulkCreateView(GetReturnURLMixin, View):
             except IntegrityError:
                 pass
 
+        else:
+            logger.debug("Form validation failed")
+
         return render(request, self.template_name, {
             'form': form,
             'model_form': model_form,
@@ -430,7 +445,6 @@ class ObjectImportView(GetReturnURLMixin, View):
     template_name = 'utilities/obj_import.html'
 
     def get(self, request):
-
         form = ImportForm()
 
         return render(request, self.template_name, {
@@ -440,9 +454,11 @@ class ObjectImportView(GetReturnURLMixin, View):
         })
 
     def post(self, request):
-
+        logger = logging.getLogger('netbox.views.ObjectImportView')
         form = ImportForm(request.POST)
+
         if form.is_valid():
+            logger.debug("Import form validation was successful")
 
             # Initialize model form
             data = form.cleaned_data['data']
@@ -463,9 +479,11 @@ class ObjectImportView(GetReturnURLMixin, View):
 
                         # Save the primary object
                         obj = model_form.save()
+                        logger.debug(f"Created {obj} (PK: {obj.pk})")
 
                         # Iterate through the related object forms (if any), validating and saving each instance.
                         for field_name, related_object_form in self.related_object_forms.items():
+                            logger.debug("Processing form for related objects: {related_object_form}")
 
                             for i, rel_obj_data in enumerate(data.get(field_name, list())):
 
@@ -489,7 +507,7 @@ class ObjectImportView(GetReturnURLMixin, View):
                     pass
 
             if not model_form.errors:
-
+                logger.info(f"Import object {obj} (PK: {obj.pk})")
                 messages.success(request, mark_safe('Imported object: <a href="{}">{}</a>'.format(
                     obj.get_absolute_url(), obj
                 )))
@@ -504,6 +522,7 @@ class ObjectImportView(GetReturnURLMixin, View):
                     return redirect(self.get_return_url(request, obj))
 
             else:
+                logger.debug("Model form validation failed")
 
                 # Replicate model form errors for display
                 for field, errors in model_form.errors.items():
@@ -513,6 +532,9 @@ class ObjectImportView(GetReturnURLMixin, View):
                         else:
                             form.add_error(None, "{}: {}".format(field, err))
 
+        else:
+            logger.debug("Import form validation failed")
+
         return render(request, self.template_name, {
             'form': form,
             'obj_type': self.model._meta.verbose_name,
@@ -560,14 +582,14 @@ class BulkImportView(GetReturnURLMixin, View):
         })
 
     def post(self, request):
-
+        logger = logging.getLogger('netbox.views.BulkImportView')
         new_objs = []
         form = self._import_form(request.POST)
 
         if form.is_valid():
+            logger.debug("Form validation was successful")
 
             try:
-
                 # Iterate through CSV data and bind each row to a new model form instance.
                 with transaction.atomic():
                     for row, data in enumerate(form.cleaned_data['csv'], start=1):
@@ -585,6 +607,7 @@ class BulkImportView(GetReturnURLMixin, View):
 
                 if new_objs:
                     msg = 'Imported {} {}'.format(len(new_objs), new_objs[0]._meta.verbose_name_plural)
+                    logger.info(msg)
                     messages.success(request, msg)
 
                     return render(request, "import_success.html", {
@@ -595,6 +618,9 @@ class BulkImportView(GetReturnURLMixin, View):
             except ValidationError:
                 pass
 
+        else:
+            logger.debug("Form validation failed")
+
         return render(request, self.template_name, {
             'form': form,
             'fields': self.model_form().fields,
@@ -623,7 +649,7 @@ class BulkEditView(GetReturnURLMixin, View):
         return redirect(self.get_return_url(request))
 
     def post(self, request, **kwargs):
-
+        logger = logging.getLogger('netbox.views.BulkEditView')
         model = self.queryset.model
 
         # If we are editing *all* objects in the queryset, replace the PK list with all matched objects.
@@ -636,8 +662,9 @@ class BulkEditView(GetReturnURLMixin, View):
 
         if '_apply' in request.POST:
             form = self.form(model, request.POST)
-            if form.is_valid():
 
+            if form.is_valid():
+                logger.debug("Form validation was successful")
                 custom_fields = form.custom_fields if hasattr(form, 'custom_fields') else []
                 standard_fields = [
                     field for field in form.fields if field not in custom_fields + ['pk']
@@ -677,6 +704,7 @@ class BulkEditView(GetReturnURLMixin, View):
 
                             obj.full_clean()
                             obj.save()
+                            logger.debug(f"Saved {obj} (PK: {obj.pk})")
 
                             # Update custom fields
                             obj_type = ContentType.objects.get_for_model(model)
@@ -697,6 +725,7 @@ class BulkEditView(GetReturnURLMixin, View):
                                         )
                                     cfv.value = form.cleaned_data[name]
                                     cfv.save()
+                            logger.debug(f"Saved custom fields for {obj} (PK: {obj.pk})")
 
                             # Add/remove tags
                             if form.cleaned_data.get('add_tags', None):
@@ -708,6 +737,7 @@ class BulkEditView(GetReturnURLMixin, View):
 
                     if updated_count:
                         msg = 'Updated {} {}'.format(updated_count, model._meta.verbose_name_plural)
+                        logger.info(msg)
                         messages.success(self.request, msg)
 
                     return redirect(self.get_return_url(request))
@@ -715,6 +745,9 @@ class BulkEditView(GetReturnURLMixin, View):
                 except ValidationError as e:
                     messages.error(self.request, "{} failed validation: {}".format(obj, e))
 
+            else:
+                logger.debug("Form validation failed")
+
         else:
             # Include the PK list as initial data for the form
             initial_data = {'pk': pk_list}
@@ -761,7 +794,7 @@ class BulkDeleteView(GetReturnURLMixin, View):
         return redirect(self.get_return_url(request))
 
     def post(self, request, **kwargs):
-
+        logger = logging.getLogger('netbox.views.BulkDeleteView')
         model = self.queryset.model
 
         # Are we deleting *all* objects in the queryset or just a selected subset?
@@ -778,19 +811,25 @@ class BulkDeleteView(GetReturnURLMixin, View):
         if '_confirm' in request.POST:
             form = form_cls(request.POST)
             if form.is_valid():
+                logger.debug("Form validation was successful")
 
                 # Delete objects
                 queryset = model.objects.filter(pk__in=pk_list)
                 try:
                     deleted_count = queryset.delete()[1][model._meta.label]
                 except ProtectedError as e:
+                    logger.info("Caught ProtectedError while attempting to delete objects")
                     handle_protectederror(list(queryset), request, e)
                     return redirect(self.get_return_url(request))
 
                 msg = 'Deleted {} {}'.format(deleted_count, model._meta.verbose_name_plural)
+                logger.info(msg)
                 messages.success(request, msg)
                 return redirect(self.get_return_url(request))
 
+            else:
+                logger.debug("Form validation failed")
+
         else:
             form = form_cls(initial={
                 'pk': pk_list,
@@ -814,12 +853,12 @@ class BulkDeleteView(GetReturnURLMixin, View):
         """
         Provide a standard bulk delete form if none has been specified for the view
         """
-
         class BulkDeleteForm(ConfirmationForm):
             pk = ModelMultipleChoiceField(queryset=self.queryset, widget=MultipleHiddenInput)
 
         if self.form:
             return self.form
+
         return BulkDeleteForm
 
 
@@ -908,7 +947,7 @@ class BulkComponentCreateView(GetReturnURLMixin, View):
     template_name = 'utilities/obj_bulk_add_component.html'
 
     def post(self, request):
-
+        logger = logging.getLogger('netbox.views.BulkComponentCreateView')
         parent_model_name = self.parent_model._meta.verbose_name_plural
         model_name = self.model._meta.verbose_name_plural
 
@@ -926,10 +965,13 @@ class BulkComponentCreateView(GetReturnURLMixin, View):
 
         if '_create' in request.POST:
             form = self.form(request.POST)
+
             if form.is_valid():
+                logger.debug("Form validation was successful")
 
                 new_components = []
                 data = deepcopy(form.cleaned_data)
+
                 for obj in data['pk']:
 
                     names = data['name_pattern']
@@ -949,15 +991,20 @@ class BulkComponentCreateView(GetReturnURLMixin, View):
 
                 if not form.errors:
                     self.model.objects.bulk_create(new_components)
-
+                    msg = "Added {} {} to {} {}.".format(
-                    messages.success(request, "Added {} {} to {} {}.".format(
                         len(new_components),
                         model_name,
                         len(form.cleaned_data['pk']),
                         parent_model_name
-                    ))
+                    )
+                    logger.info(msg)
+                    messages.success(request, msg)
+
                     return redirect(self.get_return_url(request))
 
+            else:
+                logger.debug("Form validation failed")
+
         else:
             form = self.form(initial={'pk': pk_list})