[1.11.x] Fixed #29094 -- Fixed crash when entering an invalid uuid in ModelAdmin.raw_id_fields.

Regression in 2f9861d823620da7ecb291a8f005f53da12b1e89.

Thanks Carel Burger for the report and fix.

Backport of docs552abffab16cbdff571486b683e7e7ef12e46066 from master

django/contrib/admin/widgets.py

@@ -6,6 +6,7 @@ from __future__ import unicode_literals
 import copy
 
 from django import forms
+from django.core.exceptions import ValidationError
 from django.db.models.deletion import CASCADE
 from django.urls import reverse
 from django.urls.exceptions import NoReverseMatch
@@ -174,7 +175,7 @@ class ForeignKeyRawIdWidget(forms.TextInput):
         key = self.rel.get_related_field().name
         try:
             obj = self.rel.model._default_manager.using(self.db).get(**{key: value})
-        except (ValueError, self.rel.model.DoesNotExist):
+        except (ValueError, self.rel.model.DoesNotExist, ValidationError):
             return '', ''
 
         try:

docs/releases/1.11.10.txt

@@ -15,3 +15,6 @@ Bugfixes
 * Fixed a regression where ``contrib.auth.authenticate()`` crashes if an
   authentication backend doesn't accept ``request`` and a later one does
   (:ticket:`29071`).
+
+* Fixed crash when entering an invalid uuid in ``ModelAdmin.raw_id_fields``
+  (:ticket:`29094`).

tests/admin_widgets/models.py

@@ -1,5 +1,7 @@
 from __future__ import unicode_literals
 
+import uuid
+
 from django.contrib.auth.models import User
 from django.db import models
 from django.utils.encoding import python_2_unicode_compatible
@@ -99,6 +101,7 @@ class CarTire(models.Model):
 
 
 class Honeycomb(models.Model):
+    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
     location = models.CharField(max_length=20)
 
 

tests/admin_widgets/tests.py

@@ -17,7 +17,7 @@ from django.contrib.admin.tests import AdminSeleniumTestCase
 from django.contrib.auth.models import User
 from django.core.files.storage import default_storage
 from django.core.files.uploadedfile import SimpleUploadedFile
-from django.db.models import CharField, DateField, DateTimeField
+from django.db.models import CharField, DateField, DateTimeField, UUIDField
 from django.test import SimpleTestCase, TestCase, override_settings
 from django.urls import reverse
 from django.utils import six, translation
@@ -251,6 +251,12 @@ class AdminForeignKeyRawIdWidget(TestDataMixin, TestCase):
         lookup2 = widgets.url_params_from_lookup_dict({'myfield': my_callable()})
         self.assertEqual(lookup1, lookup2)
 
+    def test_label_and_url_for_value_invalid_uuid(self):
+        field = Bee._meta.get_field('honeycomb')
+        self.assertIsInstance(field.target_field, UUIDField)
+        widget = widgets.ForeignKeyRawIdWidget(field.remote_field, admin.site)
+        self.assertEqual(widget.label_and_url_for_value('invalid-uuid'), ('', ''))
+
 
 class FilteredSelectMultipleWidgetTest(SimpleTestCase):
     def test_render(self):