updating image should redirect back to original page

 * fix bug 960448
 * syspanel inherits nova UpdateImage view/form
 * add completion_view to form base object, and get_success_url()
   that reverse the proper url for redirection on success
   handling
 * syspanel AdminEditImage was pointless because it didn't
   override the 'url', now fixed

Change-Id: Ia8f24c7a895b397f11978a59232ab00da3e8813d

horizon/dashboards/nova/images_and_snapshots/images/forms.py

@@ -39,6 +39,8 @@
 
 
 class UpdateImageForm(forms.SelfHandlingForm):
+    completion_view = 'horizon:nova:images_and_snapshots:index'
+
     image_id = forms.CharField(widget=forms.HiddenInput())
     name = forms.CharField(max_length="255", label=_("Name"))
     kernel = forms.CharField(max_length="36", label=_("Kernel ID"),
@@ -86,7 +88,7 @@ def handle(self, request, data):
             messages.success(request, _('Image was successfully updated.'))
         except:
             exceptions.handle(request, error_updating % image_id)
-        return shortcuts.redirect('horizon:nova:images_and_snapshots:index')
+        return shortcuts.redirect(self.get_success_url())
 
 
 class LaunchForm(forms.SelfHandlingForm):

horizon/dashboards/nova/templates/nova/images_and_snapshots/images/_update.html

@@ -4,7 +4,7 @@
 {% block form_id %}update_image_form{% endblock %}
 {% block form_action %}{% url horizon:nova:images_and_snapshots:images:update image.id %}{% endblock %}
 
-{% block modal-header %}Update Image{% endblock %}
+{% block modal-header %}{% trans "Update Image" %}{% endblock %}
 
 {% block modal-body %}
 <div class="left">

horizon/dashboards/syspanel/images/forms.py

@@ -0,0 +1,30 @@
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+# Copyright 2012 United States Government as represented by the
+# Administrator of the National Aeronautics and Space Administration.
+# All Rights Reserved.
+#
+# Copyright 2012 Nebula, Inc.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+import logging
+
+from horizon.dashboards.nova.images_and_snapshots.images import forms
+
+
+LOG = logging.getLogger(__name__)
+
+
+class AdminUpdateImageForm(forms.UpdateImageForm):
+    completion_view = 'horizon:syspanel:images:index'

horizon/dashboards/syspanel/images/tables.py

@@ -26,6 +26,8 @@ def allowed(self, request, image=None):
 
 
 class AdminEditImage(EditImage):
+    url = "horizon:syspanel:images:update"
+
     def allowed(self, request, image=None):
         return True
 

horizon/dashboards/syspanel/images/views.py

@@ -27,6 +27,7 @@
 from horizon import tables
 from horizon.dashboards.nova.images_and_snapshots.images import views
 from .tables import AdminImagesTable
+from .forms import AdminUpdateImageForm
 
 
 LOG = logging.getLogger(__name__)
@@ -48,3 +49,4 @@ def get_data(self):
 
 class UpdateView(views.UpdateView):
     template_name = 'syspanel/images/update.html'
+    form_class = AdminUpdateImageForm

horizon/dashboards/syspanel/templates/syspanel/images/_update.html

@@ -1,8 +1,8 @@
 {% extends "horizon/common/_modal_form.html" %}
 {% load i18n %}
 
-{% block form_id %}udate_image_form{% endblock %}
-{% block form_action %}{% url horizon:syspanel:images:update %}{% endblock %}
+{% block form_id %}update_image_form{% endblock %}
+{% block form_action %}{% url horizon:syspanel:images:update image.id %}{% endblock %}
 
 {% block modal_id %}update_image_modal{% endblock %}
 {% block modal-header %}{% trans "Update Image" %}{% endblock %}

horizon/forms/base.py

@@ -22,6 +22,7 @@
 import logging
 
 from django import forms
+from django.core.urlresolvers import reverse
 from django.utils import dates
 
 from horizon import exceptions
@@ -54,6 +55,16 @@ def __init__(self, *args, **kwargs):
         kwargs['initial'] = initial
         super(SelfHandlingForm, self).__init__(*args, **kwargs)
 
+    def get_success_url(self, request=None):
+        """
+        Returns the URL to redirect to after a successful handling.
+        """
+        if self.completion_view:
+            return reverse(self.completion_view)
+        if self.completion_url:
+            return self.completion_url
+        return request.get_full_path()
+
     @classmethod
     def _instantiate(cls, request, *args, **kwargs):
         """ Instantiates the form. Allows customization in subclasses. """