updated the files to render fieldset

django/contrib/admin/helpers.py

@@ -173,6 +173,7 @@ class AdminField:
         self.is_first = is_first  # Whether this field is first on the line
         self.is_checkbox = isinstance(self.field.field.widget, forms.CheckboxInput)
         self.is_readonly = False
+        self.is_fieldset = self.field.field.widget.use_fieldset
 
     def label_tag(self):
         classes = []
@@ -185,12 +186,14 @@ class AdminField:
         if not self.is_first:
             classes.append("inline")
         attrs = {"class": " ".join(classes)} if classes else {}
+        tag = "legend" if self.is_fieldset else None
         # checkboxes should not have a label suffix as the checkbox appears
         # to the left of the label.
         return self.field.label_tag(
             contents=mark_safe(contents),
             attrs=attrs,
             label_suffix="" if self.is_checkbox else None,
+            tag=tag,
         )
 
     def errors(self):

django/contrib/admin/templates/admin/includes/fieldset.html

@@ -12,6 +12,7 @@
             {% if line.fields|length == 1 %}{{ line.errors }}{% else %}<div class="flex-container form-multiline">{% endif %}
             {% for field in line %}
                 <div>
+                    {% if field.is_fieldset %}<fieldset{% if field.field.help_text %} aria-describedby="{{ field.field.id_for_label }}_helptext"{% endif %}>{% endif %}
                     {% if not line.fields|length == 1 and not field.is_readonly %}{{ field.errors }}{% endif %}
                         <div class="flex-container{% if not line.fields|length == 1 %} fieldBox{% if field.field.name %} field-{{ field.field.name }}{% endif %}{% if not field.is_readonly and field.errors %} errors{% endif %}{% if field.field.is_hidden %} hidden{% endif %}{% endif %}{% if field.is_checkbox %} checkbox-row{% endif %}">
                             {% if field.is_checkbox %}
@@ -30,6 +31,7 @@
                             <div>{{ field.field.help_text|safe }}</div>
                         </div>
                     {% endif %}
+                    {% if field.is_fieldset %}</fieldset>{% endif %}
                 </div>
             {% endfor %}
             {% if not line.fields|length == 1 %}</div>{% endif %}

django/contrib/admin/widgets.py

@@ -27,8 +27,6 @@ class FilteredSelectMultiple(forms.SelectMultiple):
     catalog has been loaded in the page
     """
 
-    use_fieldset = True
-
     class Media:
         js = [
             "admin/js/core.js",
@@ -52,7 +50,6 @@ class FilteredSelectMultiple(forms.SelectMultiple):
 
 
 class BaseAdminDateWidget(forms.DateInput):
-    use_fieldset = True
 
     class Media:
         js = [
@@ -70,7 +67,6 @@ class AdminDateWidget(BaseAdminDateWidget):
 
 
 class BaseAdminTimeWidget(forms.TimeInput):
-    use_fieldset = True
 
     class Media:
         js = [
@@ -92,7 +88,6 @@ class AdminSplitDateTime(forms.SplitDateTimeWidget):
     A SplitDateTime Widget that has some admin-specific styling.
     """
 
-    use_fieldset = True
     template_name = "admin/widgets/split_datetime.html"
 
     def __init__(self, attrs=None):
@@ -109,12 +104,10 @@ class AdminSplitDateTime(forms.SplitDateTimeWidget):
 
 
 class AdminRadioSelect(forms.RadioSelect):
-    use_fieldset = True
     template_name = "admin/widgets/radio.html"
 
 
 class AdminFileWidget(forms.ClearableFileInput):
-    use_fieldset = True
     template_name = "admin/widgets/clearable_file_input.html"
 
 
@@ -144,7 +137,6 @@ class ForeignKeyRawIdWidget(forms.TextInput):
     in a <select> box.
     """
 
-    use_fieldset = True
     template_name = "admin/widgets/foreign_key_raw_id.html"
 
     def __init__(self, rel, admin_site, attrs=None, using=None):
@@ -373,28 +365,24 @@ class RelatedFieldWidgetWrapper(forms.Widget):
 
 
 class AdminTextareaWidget(forms.Textarea):
-    use_fieldset = True
 
     def __init__(self, attrs=None):
         super().__init__(attrs={"class": "vLargeTextField", **(attrs or {})})
 
 
 class AdminTextInputWidget(forms.TextInput):
-    use_fieldset = True
 
     def __init__(self, attrs=None):
         super().__init__(attrs={"class": "vTextField", **(attrs or {})})
 
 
 class AdminEmailInputWidget(forms.EmailInput):
-    use_fieldset = True
 
     def __init__(self, attrs=None):
         super().__init__(attrs={"class": "vTextField", **(attrs or {})})
 
 
 class AdminURLFieldWidget(forms.URLInput):
-    use_fieldset = True
     template_name = "admin/widgets/url.html"
 
     def __init__(self, attrs=None, validator_class=URLValidator):
@@ -418,7 +406,6 @@ class AdminURLFieldWidget(forms.URLInput):
 
 
 class AdminIntegerFieldWidget(forms.NumberInput):
-    use_fieldset = True
     class_name = "vIntegerField"
 
     def __init__(self, attrs=None):
@@ -430,7 +417,6 @@ class AdminBigIntegerFieldWidget(AdminIntegerFieldWidget):
 
 
 class AdminUUIDInputWidget(forms.TextInput):
-    use_fieldset = True
 
     def __init__(self, attrs=None):
         super().__init__(attrs={"class": "vUUIDField", **(attrs or {})})
@@ -619,10 +605,8 @@ class AutocompleteMixin:
 
 
 class AutocompleteSelect(AutocompleteMixin, forms.Select):
-    use_fieldset = True
     pass
 
 
 class AutocompleteSelectMultiple(AutocompleteMixin, forms.SelectMultiple):
-    use_fieldset = True
     pass

tests/admin_widgets/tests.py

@@ -855,6 +855,12 @@ class ManyToManyRawIdWidgetTest(TestCase):
 
 @override_settings(ROOT_URLCONF="admin_widgets.urls")
 class RelatedFieldWidgetWrapperTests(SimpleTestCase):
+    def test_widget_wrapper_uses_fieldset(self):
+        rel = Individual._meta.get_field("parent").remote_field
+        widget = forms.TextInput()
+        wrapper = widgets.RelatedFieldWidgetWrapper(widget, rel, widget_admin_site)
+        self.assertTrue(wrapper.use_fieldset)
+
     def test_no_can_add_related(self):
         rel = Individual._meta.get_field("parent").remote_field
         w = widgets.AdminRadioSelect()