Fixed #32545 -- Improved admin widget for raw_id_fields for UUIDFields.

Co-Authored-By: Jerome Leclanche <jerome@leclan.ch>

django/contrib/admin/static/admin/css/forms.css

@@ -350,10 +350,6 @@ body.popup .submit-row {
     width: 2.2em;
 }
 
-.vTextField, .vUUIDField {
-    width: 20em;
-}
-
 .vIntegerField {
     width: 5em;
 }
@@ -366,6 +362,10 @@ body.popup .submit-row {
     width: 5em;
 }
 
+.vTextField, .vUUIDField {
+    width: 20em;
+}
+
 /* INLINES */
 
 .inline-group {

django/contrib/admin/widgets.py

@@ -8,7 +8,7 @@ from django import forms
 from django.conf import settings
 from django.core.exceptions import ValidationError
 from django.core.validators import URLValidator
-from django.db.models import CASCADE
+from django.db.models import CASCADE, UUIDField
 from django.urls import reverse
 from django.urls.exceptions import NoReverseMatch
 from django.utils.html import smart_urlquote
@@ -149,7 +149,10 @@ class ForeignKeyRawIdWidget(forms.TextInput):
             context['related_url'] = related_url
             context['link_title'] = _('Lookup')
             # The JavaScript code looks for this class.
-            context['widget']['attrs'].setdefault('class', 'vForeignKeyRawIdAdminField')
+            css_class = 'vForeignKeyRawIdAdminField'
+            if isinstance(self.rel.get_related_field(), UUIDField):
+                css_class += ' vUUIDField'
+            context['widget']['attrs'].setdefault('class', css_class)
         else:
             context['related_url'] = None
         if context['widget']['value']:

tests/admin_widgets/tests.py

@@ -26,7 +26,7 @@ from django.utils import translation
 
 from .models import (
     Advisor, Album, Band, Bee, Car, Company, Event, Honeycomb, Individual,
-    Inventory, Member, MyFileField, Profile, School, Student,
+    Inventory, Member, MyFileField, Profile, ReleaseEvent, School, Student,
     UnsafeLimitChoicesTo, VideoStream,
 )
 from .widgetadmin import site as widget_admin_site
@@ -538,19 +538,27 @@ class ForeignKeyRawIdWidgetTest(TestCase):
         band.album_set.create(
             name='Hybrid Theory', cover_art=r'albums\hybrid_theory.jpg'
         )
-        rel = Album._meta.get_field('band').remote_field
-
-        w = widgets.ForeignKeyRawIdWidget(rel, widget_admin_site)
+        rel_uuid = Album._meta.get_field('band').remote_field
+        w = widgets.ForeignKeyRawIdWidget(rel_uuid, widget_admin_site)
         self.assertHTMLEqual(
             w.render('test', band.uuid, attrs={}),
             '<input type="text" name="test" value="%(banduuid)s" '
-            'class="vForeignKeyRawIdAdminField">'
+            'class="vForeignKeyRawIdAdminField vUUIDField">'
             '<a href="/admin_widgets/band/?_to_field=uuid" class="related-lookup" '
             'id="lookup_id_test" title="Lookup"></a>&nbsp;<strong>'
             '<a href="/admin_widgets/band/%(bandpk)s/change/">Linkin Park</a>'
             '</strong>' % {'banduuid': band.uuid, 'bandpk': band.pk}
         )
 
+        rel_id = ReleaseEvent._meta.get_field('album').remote_field
+        w = widgets.ForeignKeyRawIdWidget(rel_id, widget_admin_site)
+        self.assertHTMLEqual(
+            w.render('test', None, attrs={}),
+            '<input type="text" name="test" class="vForeignKeyRawIdAdminField">'
+            '<a href="/admin_widgets/album/?_to_field=id" class="related-lookup" '
+            'id="lookup_id_test" title="Lookup"></a>',
+        )
+
     def test_relations_to_non_primary_key(self):
         # ForeignKeyRawIdWidget works with fields which aren't related to
         # the model's primary key.