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OpenStack Study: views.py**** CubicPower OpenStack Study ****
# vim: tabstop=4 shiftwidth=4 softtabstop=4 # 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 json import os from django import http from django.views import generic from horizon import exceptions ADD_TO_FIELD_HEADER = "HTTP_X_HORIZON_ADD_TO_FIELD"
**** CubicPower OpenStack Study **** class ModalFormMixin(object):
**** CubicPower OpenStack Study **** def get_template_names(self): if self.request.is_ajax(): if not hasattr(self, "ajax_template_name"): # Transform standard template name to ajax name (leading "_") bits = list(os.path.split(self.template_name)) bits[1] = "".join(("_", bits[1])) self.ajax_template_name = os.path.join(*bits) template = self.ajax_template_name else: template = self.template_name return template
**** CubicPower OpenStack Study **** def get_context_data(self, **kwargs): context = super(ModalFormMixin, self).get_context_data(**kwargs) if self.request.is_ajax(): context['hide'] = True if ADD_TO_FIELD_HEADER in self.request.META: context['add_to_field'] = self.request.META[ADD_TO_FIELD_HEADER] return context
**** CubicPower OpenStack Study **** class ModalFormView(ModalFormMixin, generic.FormView): """The main view class from which all views which handle forms in Horizon should inherit. It takes care of all details with processing :class:`~horizon.forms.base.SelfHandlingForm` classes, and modal concerns when the associated template inherits from `horizon/common/_modal_form.html`. Subclasses must
**** CubicPower OpenStack Study **** def get_object_id(self, obj): """For dynamic insertion of resources created in modals, this method returns the id of the created object. Defaults to returning the ``id`` attribute. """ return obj.id
**** CubicPower OpenStack Study **** def get_object_display(self, obj): """For dynamic insertion of resources created in modals, this method returns the display name of the created object. Defaults to returning the ``name`` attribute. """ return obj.name
**** CubicPower OpenStack Study **** def get_form(self, form_class): """Returns an instance of the form to be used in this view.""" return form_class(self.request, **self.get_form_kwargs())
**** CubicPower OpenStack Study **** def form_valid(self, form): try: handled = form.handle(self.request, form.cleaned_data) except Exception: handled = None exceptions.handle(self.request) if handled: if ADD_TO_FIELD_HEADER in self.request.META: field_id = self.request.META[ADD_TO_FIELD_HEADER] data = [self.get_object_id(handled), self.get_object_display(handled)] response = http.HttpResponse(json.dumps(data)) response["X-Horizon-Add-To-Field"] = field_id elif isinstance(handled, http.HttpResponse): return handled else: success_url = self.get_success_url() response = http.HttpResponseRedirect(success_url) # TODO(gabriel): This is not a long-term solution to how # AJAX should be handled, but it's an expedient solution # until the blueprint for AJAX handling is architected # and implemented. response['X-Horizon-Location'] = success_url return response else: # If handled didn't return, we can assume something went # wrong, and we should send back the form as-is. return self.form_invalid(form)
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