Fixed #18530 -- Fixed a small regression in the admin filters where wrongly formatted dates passed as url parameters caused an unhandled ValidationError. Thanks to david for the report.

django/contrib/admin/filters.py

@@ -8,13 +8,13 @@ certain test -- e.g. being a DateField or ForeignKey.
 import datetime
 
 from django.db import models
-from django.core.exceptions import ImproperlyConfigured
+from django.core.exceptions import ImproperlyConfigured, ValidationError
 from django.utils.encoding import smart_text
 from django.utils.translation import ugettext_lazy as _
 from django.utils import timezone
-
 from django.contrib.admin.util import (get_model_from_relation,
     reverse_field_path, get_limit_choices_to_from_path, prepare_lookup_value)
+from django.contrib.admin.options import IncorrectLookupParameters
 
 class ListFilter(object):
     title = None  # Human-readable title to appear in the right sidebar.
@@ -129,7 +129,10 @@ class FieldListFilter(ListFilter):
         return True
 
     def queryset(self, request, queryset):
+        try:
             return queryset.filter(**self.used_parameters)
+        except ValidationError as e:
+            raise IncorrectLookupParameters(e)
 
     @classmethod
     def register(cls, test, list_filter_class, take_priority=False):

tests/regressiontests/admin_views/admin.py

@@ -130,7 +130,7 @@ class CustomArticleAdmin(admin.ModelAdmin):
 
 
 class ThingAdmin(admin.ModelAdmin):
-    list_filter = ('color__warm', 'color__value')
+    list_filter = ('color__warm', 'color__value', 'pub_date',)
 
 
 class InquisitionAdmin(admin.ModelAdmin):

tests/regressiontests/admin_views/models.py

@@ -128,6 +128,7 @@ class Color2(Color):
 class Thing(models.Model):
     title = models.CharField(max_length=20)
     color = models.ForeignKey(Color, limit_choices_to={'warm': True})
+    pub_date = models.DateField(blank=True, null=True)
     def __str__(self):
         return self.title
 

tests/regressiontests/admin_views/tests.py

@@ -436,6 +436,10 @@ class AdminViewBasicTest(TestCase):
         response = self.client.get('/test_admin/%s/admin_views/thing/' % self.urlbit, {'color__id__exact': 'StringNotInteger!'})
         self.assertRedirects(response, '/test_admin/%s/admin_views/thing/?e=1' % self.urlbit)
 
+        # Regression test for #18530
+        response = self.client.get('/test_admin/%s/admin_views/thing/' % self.urlbit, {'pub_date__gte': 'foo'})
+        self.assertRedirects(response, '/test_admin/%s/admin_views/thing/?e=1' % self.urlbit)
+
     def testIsNullLookups(self):
         """Ensure is_null is handled correctly."""
         Article.objects.create(title="I Could Go Anywhere", content="Versatile", date=datetime.datetime.now())