Fixed #7250 -- Don't show internal data of a FileField in the admin when the form does not validate. This also alternatively fixes a recent problem since [8244] when the form is not valid. Thanks Marc Garcia for the initial ticket.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@8277 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/contrib/admin/widgets.py

@@ -84,7 +84,7 @@ class AdminFileWidget(forms.FileInput):
         
     def render(self, name, value, attrs=None):
         output = []
-        if value:
+        if value and hasattr(value, "url"):
             output.append('%s <a target="_blank" href="%s">%s</a> <br />%s ' % \
                 (_('Currently:'), value.url, value, _('Change:')))
         output.append(super(AdminFileWidget, self).render(name, value, attrs))

tests/regressiontests/admin_widgets/models.py

@@ -27,6 +27,7 @@ class Album(models.Model):
 __test__ = {'WIDGETS_TESTS': """
 >>> from datetime import datetime
 >>> from django.utils.html import escape, conditional_escape
+>>> from django.core.files.uploadedfile import SimpleUploadedFile
 >>> from django.contrib.admin.widgets import FilteredSelectMultiple, AdminSplitDateTime
 >>> from django.contrib.admin.widgets import AdminFileWidget, ForeignKeyRawIdWidget, ManyToManyRawIdWidget
 >>> from django.contrib.admin.widgets import RelatedFieldWidgetWrapper
@@ -54,6 +55,8 @@ HTML escaped.
 >>> w = AdminFileWidget()
 >>> print conditional_escape(w.render('test', album.cover_art))
 Currently: <a target="_blank" href="%(STORAGE_URL)salbums/hybrid_theory.jpg">albums\hybrid_theory.jpg</a> <br />Change: <input type="file" name="test" />
+>>> print conditional_escape(w.render('test', SimpleUploadedFile('test', 'content')))
+<input type="file" name="test" />
 
 >>> rel = Album._meta.get_field('band').rel
 >>> w = ForeignKeyRawIdWidget(rel)