Fix RuleWidget

src/newsreader/news/core/templates/news/core/widgets/rule.html

@@ -1,10 +1,10 @@
-<input class="input category-form__input" type="checkbox"
-     name="rules" value="{{ rule.pk }}" checked{% endif %} />
+<input class="input category-form__input" type="{{ option.type }}"
+       name="{{ option.name }}" value="{{ option.value|stringformat:'s' }}"{% if option.selected %} checked{% endif %} />
 
-{% if rule.favicon %}
-  <img class="favicon" src="{{ rule.favicon }}" />
+{% if option.instance.favicon %}
+  <img class="favicon" src="{{ option.instance.favicon }}" />
 {% else %}
   <i class="gg-image"></i>
 {% endif %}
 
-<span>{{ rule.name }}</span>
+<span>{{ option.label }}</span>

src/newsreader/news/core/templates/news/core/widgets/rules.html

@@ -1,7 +1,9 @@
 <ul class="list checkbox-list">
-  {% for rule in rules %}
-    <li class="list__item checkbox-list__item">
-      {% include "news/core/widgets/rule.html" %}
-    </li>
+  {% for group, options, index in widget.optgroups %}
+    {% for option in options %}
+      <li class="list__item checkbox-list__item">
+        {% include "news/core/widgets/rule.html" with option=option only %}
+      </li>
+    {% endfor %}
   {% endfor %}
 </ul>

src/newsreader/news/core/widgets.py

@@ -4,3 +4,8 @@ from django.forms.widgets import CheckboxSelectMultiple
 class RulesWidget(CheckboxSelectMultiple):
     template_name = "news/core/widgets/rules.html"
     option_template_name = "news/core/widgets/rule.html"
+
+    def create_option(self, *args, **kwargs):
+        option = super().create_option(*args, **kwargs)
+        instance = self.choices.queryset.get(pk=option["value"])
+        return {**option, "instance": instance}