Fixed #7361 -- Added cancel link to admin delete views.

django/contrib/admin/static/admin/css/base.css

@@ -410,7 +410,7 @@ table.orderable-initalized .order-cell, body>tr>td.order-cell {
 
 /* FORM DEFAULTS */
 
-input, textarea, select, .form-row p {
+input, textarea, select, .form-row p, form .button {
     margin: 2px 0;
     padding: 2px 3px;
     vertical-align: middle;
@@ -430,7 +430,7 @@ textarea, select, .vTextField {
 
 /* FORM BUTTONS */
 
-.button, input[type=submit], input[type=button], .submit-row input {
+.button, input[type=submit], input[type=button], .submit-row input, a.button {
     background: #fff url(../img/nav-bg.gif) bottom repeat-x;
     padding: 3px 5px;
     color: black;
@@ -438,6 +438,10 @@ textarea, select, .vTextField {
     border-color: #ddd #aaa #aaa #ddd;
 }
 
+a.button {
+    padding: 4px 5px;
+}
+
 .button:active, input[type=submit]:active, input[type=button]:active {
     background-image: url(../img/nav-bg-reverse.gif);
     background-position: top;

django/contrib/admin/templates/admin/delete_confirmation.html

@@ -37,6 +37,7 @@
     <div>
     <input type="hidden" name="post" value="yes" />
     <input type="submit" value="{% trans "Yes, I'm sure" %}" />
+    <a href="#" onclick="window.history.back(); return false;" class="button cancel-link">{% trans "No, take me back" %}</a>
     </div>
     </form>
 {% endif %}

django/contrib/admin/templates/admin/delete_selected_confirmation.html

@@ -42,6 +42,7 @@
     <input type="hidden" name="action" value="delete_selected" />
     <input type="hidden" name="post" value="yes" />
     <input type="submit" value="{% trans "Yes, I'm sure" %}" />
+    <a href="#" onclick="window.history.back(); return false;" class="button cancel-link">{% trans "No, take me back" %}</a>
     </div>
     </form>
 {% endif %}

tests/admin_views/tests.py

@@ -3814,6 +3814,37 @@ class SeleniumAdminViewsFirefoxTests(AdminSeleniumWebDriverTestCase):
             self.selenium.find_element_by_id('id_start_date_0')
         )
 
+    def test_cancel_delete_confirmation(self):
+        "Cancelling the deletion of an object takes the user back one page."
+        pizza = Pizza.objects.create(name="Panucci's Double Cheese")
+        url = reverse('admin:admin_views_pizza_change', args=(pizza.id,))
+        full_url = '%s%s' % (self.live_server_url, url)
+        self.admin_login(username='super', password='secret', login_url='/test_admin/admin/')
+        self.selenium.get(full_url)
+        self.selenium.find_element_by_class_name('deletelink').click()
+        self.selenium.find_element_by_class_name('cancel-link').click()
+        self.assertEqual(self.selenium.current_url, full_url)
+        self.assertEqual(Pizza.objects.count(), 1)
+
+    def test_cancel_delete_related_confirmation(self):
+        """
+        Cancelling the deletion of an object with relations takes the user back
+        one page.
+        """
+        pizza = Pizza.objects.create(name="Panucci's Double Cheese")
+        topping1 = Topping.objects.create(name="Cheddar")
+        topping2 = Topping.objects.create(name="Mozzarella")
+        pizza.toppings.add(topping1, topping2)
+        url = reverse('admin:admin_views_pizza_change', args=(pizza.id,))
+        full_url = '%s%s' % (self.live_server_url, url)
+        self.admin_login(username='super', password='secret', login_url='/test_admin/admin/')
+        self.selenium.get(full_url)
+        self.selenium.find_element_by_class_name('deletelink').click()
+        self.selenium.find_element_by_class_name('cancel-link').click()
+        self.assertEqual(self.selenium.current_url, full_url)
+        self.assertEqual(Pizza.objects.count(), 1)
+        self.assertEqual(Topping.objects.count(), 2)
+
 
 class SeleniumAdminViewsChromeTests(SeleniumAdminViewsFirefoxTests):
     webdriver_class = 'selenium.webdriver.chrome.webdriver.WebDriver'