tests/backoffice_pages/test_form_inspect.py

@@ -429,6 +429,11 @@ def test_inspect_page(pub, local_user):
     assert resp.pyquery('#test-tool-result p:last-child').text() == 'Invalid filter "not a field"'
     assert pub.loggederror_class.count() == 0
 
+    resp.form['django-condition'] = 'form_objects|first|get:0'
+    resp = resp.form.submit()
+    assert resp.pyquery('#test-tool-result p:last-child').text() == '|get called with invalid key (0)'
+    assert pub.loggederror_class.count() == 0
+
     # check there's a custom hint when a template is used as condition
     resp.form['test_mode'] = 'django-condition'
     resp.form['django-condition'] = '{% if True %}hello{% endif %}'

tests/test_formdata.py

@@ -1889,6 +1889,17 @@ def test_lazy_formdata_queryset_get_from_first(pub, variable_test_data):
     assert tmpl.render(context) == 'bar'
 
 
+def test_lazy_formdata_get_error_report(pub, variable_test_data):
+    context = pub.substitutions.get_context_variables(mode='lazy')
+    del context['form']  # remove actual form from context
+    pub.loggederror_class.wipe()
+    tmpl = Template('{{forms|objects:"foobarlazy"|first|get:0}}')
+    assert tmpl.render(context) == 'None'
+    assert pub.loggederror_class.count() == 1
+    logged_error = pub.loggederror_class.select()[0]
+    assert logged_error.summary == '|get called with invalid key (0)'
+
+
 def test_lazy_formdata_queryset_order_by(pub, variable_test_data):
     lazy_formdata = variable_test_data
     data_class = lazy_formdata._formdef.data_class()

wcs/variables.py

@@ -1033,6 +1033,9 @@ class LazyFormData(LazyFormDef):
             # queryset|first|get:"form_var_plop"
             compat_dict = CompatibilityNamesDict({'form': self})
             return compat_dict.get(key)
+        except Exception as e:
+            get_publisher().record_error(_('|get called with invalid key (%s)') % key, exception=e)
+            return None
 
     def __getitem__(self, key):
         try: