added validation error for forgetting variables in CONSTANCE_CONFIG_FIELDSETS

constance/admin.py

@@ -149,6 +149,18 @@ class ConstanceForm(forms.Form):
                                           'form and resubmit your changes.'))
         return value
 
+    def clean(self):
+        cleaned_data = super(ConstanceForm, self).clean()
+
+        field_name_list = []
+        for fieldset_title, fields_list in settings.CONFIG_FIELDSETS.items():
+            for field_name in fields_list:
+                field_name_list.append(field_name)
+        if set(set(settings.CONFIG.keys()) - set(field_name_list)):
+            raise forms.ValidationError(_('CONSTANCE_CONFIG_FIELDSETS does not contain fields that exist in CONSTANCE_CONFIG'))
+
+        return cleaned_data
+
 
 class ConstanceAdmin(admin.ModelAdmin):
     change_list_template = 'admin/constance/change_list.html'

constance/templates/admin/constance/change_list.html

@@ -38,6 +38,13 @@
   <div id="content-main" class="constance">
     <div class="module" id="changelist">
         <form id="changelist-form" action="" method="post" enctype="multipart/form-data">{% csrf_token %}
+            {% if form.non_field_errors %}
+                <ul class="errorlist">
+                    {% for error in form.non_field_errors %}
+                      <li>{{ error }}</li>
+                    {% endfor %}
+                </ul>
+            {% endif %}
             {% if form.errors %}
             <ul class="errorlist">
             {% endif %}