conntrackt Changeset - 897541fd8978

Changeset - 897541fd8978

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Branko Majic (branko) - 12 years ago 2013-08-02 21:58:45
branko@majic.rs

CONNT-12: Integrated the 'redirect to next' mixin into views.

3 files changed with 28 insertions and 21 deletions:

conntrackt/templates/conntrackt/location_widget.html

conntrackt/templates/conntrackt/project_detail.html

conntrackt/views.py

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conntrackt/templates/conntrackt/location_widget.html

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 {% load conntrackt_tags %}
   <table class="table table-striped">
     <tr>
       <td style="width:99%"><strong>{{location.name}}</strong></td>
       <td>{% html_link '<i class="icon-book"></i>' 'project_location_iptables' project.id location.id class="btn btn-link" %}</td>
       <td></td>
       <td></td>
     </tr>
 {% for entity in entities %}
     <tr>
       <td>{% html_link entity.name 'entity' entity.id class="btn btn-link" %}</td>
       <td>{% html_link '<i class="icon-list"></i>' 'entity_iptables' entity.id class="btn btn-link" %}</td>
       <td>{% html_link '<i class="icon-edit"></i>' 'entity_update' entity.id class="btn btn-link"  %}</td>
       <td>{% html_link '<i class="icon-remove"></i>' 'entity_delete' entity.id class="btn btn-link"  %}</td>
       <td>{% html_link '<i class="icon-edit"></i>' 'entity_update' entity.id class="btn btn-link" get="next="|add:request.path %}</td>
       <td>{% html_link '<i class="icon-remove"></i>' 'entity_delete' entity.id class="btn btn-link" get="next="|add:request.path %}</td>
     </tr>
 {% endfor %}
     {% with project_id=project.id|slugify location_id=location.id|slugify %}
     <tr>
       <td>{% html_link "Add entity" "entity_create" class="btn btn-primary btn-mini" get="project="|add:project_id|add:"&location="|add:location_id %}</td>
+      <td>{% html_link "Add entity" "entity_create" class="btn btn-primary btn-mini" get="project="|add:project_id|add:"&location="|add:location_id|add:"&next="|add:request.path %}</td>
       <td></td>
       <td></td>
       <td></td>
     </tr>
     {% endwith %}
   </table>

conntrackt/templates/conntrackt/project_detail.html

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 {% extends "conntrackt/base.html" %}
 {# For html_link #}
 {% load conntrackt_tags %}
 {% block content %}
 <div class="row">
   <h1 class="span12">{{project.name}}</h1>
 </div>
 <hr>
 {% if project.description %}
 <div class="row">
   <div class="span12">
     {{project.description}}
   </div>
 </div>
 <hr>
 {% endif %}
 <div class="row">
   <div class="span12">
     {% html_link "Edit" "project_update" project.id class="btn btn-primary" %}
     {% html_link "Remove" "project_delete" project.id class="btn btn-primary" %}
     {% with project_id=project.id|slugify %}
     {% html_link "Add entity" "entity_create" class="btn btn-primary" get="project="|add:project_id %}
     {% html_link "Add communication" "communication_create" class="btn btn-primary" get="project="|add:project_id %}
     {% html_link "Add entity" "entity_create" class="btn btn-primary" get="project="|add:project_id|add:"&next="|add:request.path %}
     {% html_link "Add communication" "communication_create" class="btn btn-primary" get="project="|add:project_id|add:"&next="|add:request.path %}
     {% endwith %}
   </div>
 </div>
 <hr>
 {% if location_entities %}
 <div class="row">
   {% for location, entities in location_entities %}
   <div class="span4">
     <div class="well">{% include "conntrackt/location_widget.html" with location=location entities=entities %}</div>
   </div>
   {% endfor %}
 </div>
 <div class="row">
   <div class="span12">
     <h2>Communications diagram</h2>
     <img src="{% url "project_diagram" project.id %}" width="100%">
   </div>
 </div>
 {% endif %}
 {% endblock %}

conntrackt/views.py

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@@ @@ -176,764 +176,771 @@ def entity_iptables(request, pk): @@
     Makes sure to set the Content-Disposition of a response in order to
     signal the browser it should start download of this view's response
     immediately. Also sets the suggested filename for it.
     Arguments:
         pk - Primary key of the Entity object for which the rules should be
         generated.
     Returns:
         Response object that contains the iptables rules for specified entity.
     """
     # Fetch the entity, and construct the response with iptables rules as
     # content.
     entity = get_object_or_404(Entity, pk=pk)
     content = generate_entity_iptables(entity)
     response = HttpResponse(content, mimetype='text/plain')
     # Add the Content-Disposition information for the browser, telling the
     # browser to download the file with suggested filename.
     response['Content-Disposition'] = "attachment; filename=%s-iptables.conf" % entity.name.lower().replace(" ", "_")
     return response
 @permission_required("conntrackt.view", raise_exception=True)
 def project_iptables(request, project_id, location_id=None):
     """
     Custom view for obtaining iptables for all entities of a project or project
     location in a single ZIP file.
     Arguments:
         request - Request object.
         project_id - Unique ID of the project for whose entities the iptables
         rules should be generated.
         location_id - Optional unique ID of the project location for whose
         entities the iptables rules should be generated. Default is None, which
         means generate rules for _all_ entities in a project.
     Returns:
         Response object that contains the ZIP file and Content-Disposition
         information.
     """
     # Fetch the project.
     project = get_object_or_404(Project, pk=project_id)
     # Set-up a string IO object to which we'll write the ZIP file (in-memory).
     buff = StringIO()
     # Create a new ZIP file in-memory.
     zipped_iptables = ZipFile(buff, "w", ZIP_DEFLATED)
     # Create the response object, setting the mime type so browser could offer
     # to open the file with program as well.
     response = HttpResponse(mimetype='application/zip')
     # If specific location was specified, get the entities that are part of that
     # project location only, otherwise fetch all of the project's entities. Also
     # set-up the filename that will be suggested to the browser.
     if location_id:
         location = get_object_or_404(Location, pk=location_id)
         entities = project.entity_set.filter(location=location)
         filename = '%s-%s-iptables.zip' % (project.name.lower().replace(" ", "_"), location.name.lower().replace(" ", "_"))
     else:
         entities = project.entity_set.all()
         filename = '%s-iptables.zip' % (project.name.lower().replace(" ", "_"))
     # Render iptables rules for each entity, placing them in the ZIP archive.
     for entity in entities:
         entity_iptables = generate_entity_iptables(entity)
         zipped_iptables.writestr("%s-iptables.conf" % entity.name.lower().replace(" ", "_"), entity_iptables)
     # Close the archive, and flush the buffer.
     zipped_iptables.close()
     buff.flush()
     # Write the contents of our buffer (ZIP archive) to response content, and
     # close the IO string.
     response.write(buff.getvalue())
     buff.close()
     # Set the Content-Disposition so the browser would know it should download
     # the archive, and suggest the filename.
     response['Content-Disposition'] = 'attachment; filename="%s"' % filename
     # Finally return the response object.
     return response
 class ProjectCreateView(SetHeadlineMixin, MultiplePermissionsRequiredMixin, CreateView):
+class ProjectCreateView(RedirectToNextMixin, SetHeadlineMixin, MultiplePermissionsRequiredMixin, CreateView):
     """
     View for creating a new project.
     """
     model = Project
     form_class = ProjectForm
     headline = "Add new project"
     template_name = "conntrackt/create_form.html"
     # Required permissions.
     permissions = {
         "all": ("conntrackt.add_project",),
+        }
     # Raise authorisation denied exception for unmet permissions.
     raise_exception = True
 class ProjectUpdateView(SetHeadlineMixin, MultiplePermissionsRequiredMixin, UpdateView):
+class ProjectUpdateView(RedirectToNextMixin, SetHeadlineMixin, MultiplePermissionsRequiredMixin, UpdateView):
     """
     View for modifying an existing project.
     """
     model = Project
     form_class = ProjectForm
     template_name = "conntrackt/update_form.html"
     # Required permissions.
     permissions = {
         "all": ("conntrackt.change_project",),
+        }
     # Raise authorisation denied exception for unmet permissions.
     raise_exception = True
     def get_headline(self):
         """
         Set headline based on project name.
         """
         return "Update project %s" % self.object.name
 class ProjectDeleteView(SetHeadlineMixin, MultiplePermissionsRequiredMixin, DeleteView):
+class ProjectDeleteView(RedirectToNextMixin, SetHeadlineMixin, MultiplePermissionsRequiredMixin, DeleteView):
     """
     View for deleting a project.
     """
     model = Project
     template_name = "conntrackt/delete_form.html"
     # Required permissions.
     permissions = {
         "all": ("conntrackt.delete_project",),
+        }
     # Raise authorisation denied exception for unmet permissions.
     raise_exception = True
     success_url = reverse_lazy("index")
     def post(self, *args, **kwargs):
         """
         Add a success message that will be displayed to the user to confirm the
         project deletion.
         """
         messages.success(self.request, "Project %s has been removed." % self.get_object().name, extra_tags="alert alert-success")
         return super(ProjectDeleteView, self).post(*args, **kwargs)
     def get_headline(self):
         """
         Set headline based on project name.
         """
         return "Delete project %s" % self.object.name
 class LocationCreateView(SetHeadlineMixin, MultiplePermissionsRequiredMixin, CreateView):
+class LocationCreateView(RedirectToNextMixin, SetHeadlineMixin, MultiplePermissionsRequiredMixin, CreateView):
     """
     View for creating a new location.
     """
     model = Location
     form_class = LocationForm
     headline = "Add new location"
     template_name = "conntrackt/create_form.html"
     # Required permissions.
     permissions = {
         "all": ("conntrackt.add_location",),
+        }
     # Raise authorisation denied exception for unmet permissions.
     raise_exception = True
     success_url = reverse_lazy("index")
 class LocationUpdateView(SetHeadlineMixin, MultiplePermissionsRequiredMixin, UpdateView):
+class LocationUpdateView(RedirectToNextMixin, SetHeadlineMixin, MultiplePermissionsRequiredMixin, UpdateView):
     """
     View for modifying an existing location.
     """
     model = Location
     form_class = LocationForm
     template_name = "conntrackt/update_form.html"
     # Required permissions.
     permissions = {
         "all": ("conntrackt.change_location",),
+        }
     # Raise authorisation denied exception for unmet permissions.
     raise_exception = True
     success_url = reverse_lazy("index")
     def get_headline(self):
         """
         Set headline based on location name.
         """
         return "Update location %s" % self.object.name
 class LocationDeleteView(SetHeadlineMixin, MultiplePermissionsRequiredMixin, DeleteView):
+class LocationDeleteView(RedirectToNextMixin, SetHeadlineMixin, MultiplePermissionsRequiredMixin, DeleteView):
     """
     View for deleting a location.
     """
     model = Location
     template_name = "conntrackt/delete_form.html"
     # Required permissions.
     permissions = {
         "all": ("conntrackt.delete_location",),
+        }
     # Raise authorisation denied exception for unmet permissions.
     raise_exception = True
     success_url = reverse_lazy("index")
     def post(self, *args, **kwargs):
         """
         Add a success message that will be displayed to the user to confirm the
         location deletion.
         """
         messages.success(self.request, "Location %s has been removed." % self.get_object().name, extra_tags="alert alert-success")
         return super(LocationDeleteView, self).post(*args, **kwargs)
     def get_headline(self):
         """
         Set headline based on location name.
         """
         return "Delete location %s" % self.object.name
 class EntityCreateView(SetHeadlineMixin, MultiplePermissionsRequiredMixin, CreateView):
+class EntityCreateView(RedirectToNextMixin, SetHeadlineMixin, MultiplePermissionsRequiredMixin, CreateView):
     """
     View for creating a new entity.
     """
     model = Entity
     form_class = EntityForm
     headline = "Add new entity"
     template_name = "conntrackt/create_form.html"
     # Required permissions.
     permissions = {
         "all": ("conntrackt.add_entity",),
+        }
     # Raise authorisation denied exception for unmet permissions.
     raise_exception = True
     def get_form(self, form_class):
         """
         Returns an instance of form that can be used by the view.
         The method will limit the project or location select inputs if request
         contained this information.
         """
         form = super(EntityCreateView, self).get_form(form_class)
         # Limit the project selection if required.
         project_id = self.request.GET.get("project", None)
         if project_id:
             form.fields["project"].queryset = Project.objects.filter(pk=project_id)
             form.fields["project"].widget.attrs["readonly"] = True
         # Limit the location selection if required.
         location_id = self.request.GET.get("location", None)
         if location_id:
             form.fields["location"].queryset = Location.objects.filter(pk=location_id)
             form.fields["location"].widget.attrs["readonly"] = True
         return form
     def get_initial(self):
         """
         Returns initial values that should be pre-selected (if they were
         specified through a GET parameter).
         """
         initial = super(EntityCreateView, self).get_initial()
         initial["project"] = self.request.GET.get("project", None)
         initial["location"] = self.request.GET.get("location", None)
         return initial
 class EntityUpdateView(SetHeadlineMixin, MultiplePermissionsRequiredMixin, UpdateView):
+class EntityUpdateView(RedirectToNextMixin, SetHeadlineMixin, MultiplePermissionsRequiredMixin, UpdateView):
     """
     View for updating an existing entity.
     """
     model = Entity
     form_class = EntityForm
     template_name = "conntrackt/update_form.html"
     # Required permissions.
     permissions = {
         "all": ("conntrackt.change_entity",),
+        }
     # Raise authorisation denied exception for unmet permissions.
     raise_exception = True
     def get_headline(self):
         """
         Set headline based on entity name.
         """
         return "Update entity %s" % self.object.name
 class EntityDeleteView(SetHeadlineMixin, MultiplePermissionsRequiredMixin, DeleteView):
+class EntityDeleteView(RedirectToNextMixin, SetHeadlineMixin, MultiplePermissionsRequiredMixin, DeleteView):
     """
     View for deleting an entity.
     """
     model = Entity
     template_name = "conntrackt/delete_form.html"
     # Required permissions.
     permissions = {
         "all": ("conntrackt.delete_entity",),
+        }
     # Raise authorisation denied exception for unmet permissions.
     raise_exception = True
     def post(self, *args, **kwargs):
         """
         Add a success message that will be displayed to the user to confirm the
         entity deletion.
         """
         messages.success(self.request, "Entity %s has been removed." % self.get_object().name, extra_tags="alert alert-success")
         return super(EntityDeleteView, self).post(*args, **kwargs)
     def delete(self, *args, **kwargs):
         """
         Deletes the object. This method is overridden in order to obtain the
         project ID for success URL.
         @TODO: Fix this once Django 1.6 comes out with fix from ticket 19044.
         """
         self.success_url = reverse("project", args=(self.get_object().project.id,))
         return super(EntityDeleteView, self).delete(*args, **kwargs)
     def get_headline(self):
         """
         Set headline based on entity name.
         """
         return "Delete entity %s" % self.object.name
 class InterfaceCreateView(SetHeadlineMixin, MultiplePermissionsRequiredMixin, CreateView):
+class InterfaceCreateView(RedirectToNextMixin, SetHeadlineMixin, MultiplePermissionsRequiredMixin, CreateView):
     """
     View for creating a new interface.
     """
     model = Interface
     form_class = InterfaceForm
     headline = "Add new interface"
     template_name = "conntrackt/create_form.html"
     # Required permissions
     permissions = {
         "all": ("conntrackt.add_interface",),
+        }
     # Raise authorisation denied exception for unmet permissions.
     raise_exception = True
     def get_form(self, form_class):
         """
         Returns an instance of form that can be used by the view.
         The method will limit the entity select input if request contained this
         information.
         """
         form = super(InterfaceCreateView, self).get_form(form_class)
         # Limit the entity selection if required.
         entity_id = self.request.GET.get("entity", None)
         if entity_id:
             form.fields["entity"].queryset = Entity.objects.filter(pk=entity_id)
             form.fields["entity"].widget.attrs["readonly"] = True
         return form
     def get_initial(self):
         """
         Returns initial values that should be pre-selected (if they were
         specified through a GET parameter).
         """
         initial = super(InterfaceCreateView, self).get_initial()
         initial["entity"] = self.request.GET.get("entity", None)
         return initial
     def get_success_url(self):
         """
         Returns the URL to which the user should be redirected after an
         interface has been created.
         The URL in this case will be set to entity's details page.
         """
         return reverse("entity", args=(self.object.entity.pk,))
 class InterfaceUpdateView(SetHeadlineMixin, MultiplePermissionsRequiredMixin, UpdateView):
+class InterfaceUpdateView(RedirectToNextMixin, SetHeadlineMixin, MultiplePermissionsRequiredMixin, UpdateView):
     """
     View for updating an existing interface.
     """
     model = Interface
     form_class = InterfaceForm
     template_name = "conntrackt/update_form.html"
     # Required permissions.
     permissions = {
         "all": ("conntrackt.change_interface",),
+        }
     # Raise authorisation denied exception for unmet permissions.
     raise_exception = True
     def get_form(self, form_class):
         """
         Returns an instance of form that can be used by the view.
         The method will limit the entities that can be selected for the
         interface to the ones that belong to the same project as the currently
         set entity.
         """
         form = super(InterfaceUpdateView, self).get_form(form_class)
         # Limit the entities to same project.
         form.fields["entity"].queryset = Entity.objects.filter(project=self.object.entity.project)
         return form
     def get_success_url(self):
         """
         Returns the URL to which the user should be redirected after an
         interface has been updated.
         The URL in this case will be set to entity's details page.
         """
         return reverse("entity", args=(self.object.entity.pk,))
     def get_headline(self):
         """
         Set headline based on interface name.
         """
         return "Update interface %s" % self.object.name
 class InterfaceDeleteView(SetHeadlineMixin, MultiplePermissionsRequiredMixin, DeleteView):
+class InterfaceDeleteView(RedirectToNextMixin, SetHeadlineMixin, MultiplePermissionsRequiredMixin, DeleteView):
     """
     View for deleting an interface.
     """
     model = Interface
     template_name = "conntrackt/delete_form.html"
     # Required permissions.
     permissions = {
         "all": ("conntrackt.delete_interface",),
+        }
     # Raise authorisation denied exception for unmet permissions.
     raise_exception = True
     def post(self, *args, **kwargs):
         """
         Add a success message that will be displayed to the user to confirm the
         interface deletion.
         """
         messages.success(self.request, "Interface %s has been removed." % self.get_object().name, extra_tags="alert alert-success")
         return super(InterfaceDeleteView, self).post(*args, **kwargs)
     def delete(self, *args, **kwargs):
         """
         Deletes the object. This method is overridden in order to obtain the
         entity ID for success URL.
         @TODO: Fix this once Django 1.6 comes out with fix from ticket 19044.
         """
         self.success_url = reverse("entity", args=(self.get_object().entity.id,))
         return super(InterfaceDeleteView, self).delete(*args, **kwargs)
     def get_headline(self):
         """
         Set headline based on interface name.
         """
         return "Delete interface %s" % self.object.name
 class CommunicationCreateView(SetHeadlineMixin, MultiplePermissionsRequiredMixin, CreateView):
+class CommunicationCreateView(RedirectToNextMixin, SetHeadlineMixin, MultiplePermissionsRequiredMixin, CreateView):
     """
     View for creating a new communication.
     """
     model = Communication
     form_class = CommunicationForm
     headline = "Add new communication"
     template_name = "conntrackt/create_form.html"
     # Required permissions
     permissions = {
         "all": ("conntrackt.add_communication",),
+        }
     # Raise authorisation denied exception for unmet permissions.
     raise_exception = True
     def get_form(self, form_class):
         """
         Returns an instance of form that can be used by the view.
         The method will limit the source and destination interface selection to
         interfaces belonging to the same project as provided entity ID (if any
         was provided).
         """
         form = super(CommunicationCreateView, self).get_form(form_class)
         # Limit the interface selection based on provided source entity,
         # destination entity, or project.
         entity_id = self.request.GET.get("from_entity", None) or self.request.GET.get("to_entity", None)
         project_id = self.request.GET.get("project", None)
         if project_id:
             form.fields["source"].queryset = Interface.objects.filter(entity__project=project_id)
             form.fields["destination"].queryset = Interface.objects.filter(entity__project=project_id)
         elif entity_id:
             entity = Entity.objects.get(pk=1)
             form.fields["source"].queryset = Interface.objects.filter(entity__project=entity.project)
             form.fields["destination"].queryset = Interface.objects.filter(entity__project=entity.project)
         return form
     def get_initial(self):
         """
         Returns initial values that should be pre-selected (if they were
         specified through a GET parameter).
         """
         initial = super(CommunicationCreateView, self).get_initial()
         # If source or destination entity were specified in request, fetch the
         # first interface from them and use it as initial source and destination.
         from_entity = self.request.GET.get("from_entity", None)
         to_entity = self.request.GET.get("to_entity", None)
         if from_entity:
             try:
                 interface = Interface.objects.filter(entity=from_entity)[0]
                 initial["source"] = interface.id
             except IndexError:
                 pass
         if to_entity:
             try:
                 interface = Interface.objects.filter(entity=to_entity)[0]
                 initial["destination"] = interface.id
             except IndexError:
                 pass
         return initial
     def get_success_url(self):
         """
         Returns the URL to which the user should be redirected after a
         communication has been created.
         The URL will either point to value provided via GET parameter "next", or
         to project page to which the communication belongs.
         """
         return self.request.GET.get("next", reverse("project", args=(self.object.source.entity.project.pk,)))
         # We must set the success URL to something first.
         self.success_url = reverse("project", args=(self.object.source.entity.project.pk,))
         # This will override the URL if parameter "next" was provided (from
         # RedirectToNextMixin).
         success_url = super(CommunicationCreateView, self).get_success_url()
         return success_url
 class CommunicationUpdateView(SetHeadlineMixin, MultiplePermissionsRequiredMixin, UpdateView):
+class CommunicationUpdateView(RedirectToNextMixin, SetHeadlineMixin, MultiplePermissionsRequiredMixin, UpdateView):
     """
     View for updating an existing communication.
     """
     model = Communication
     form_class = CommunicationForm
     template_name = "conntrackt/update_form.html"
     # Required permissions.
     permissions = {
         "all": ("conntrackt.change_communication",),
+        }
     # Raise authorisation denied exception for unmet permissions.
     raise_exception = True
     def get_form(self, form_class):
         """
         Returns an instance of form that can be used by the view.
         The method will limit the source and destination interfaces that can be
         selected for the communication. Both will be limited to interfaces
         coming from entities that belong to the same project as current
         communication's source interface.
         """
         form = super(CommunicationUpdateView, self).get_form(form_class)
         project = self.object.source.entity.project
         form.fields["source"].queryset = Interface.objects.filter(entity__project=project)
         form.fields["destination"].queryset = Interface.objects.filter(entity__project=project)
         return form
     def get_success_url(self):
         """
         Returns the URL to which the user should be redirected after a
         communication has been created.
         The URL will either point to value provided via GET parameter "next", or
         to project page to which the communication belongs.
         """
         return self.request.GET.get("next", reverse("project", args=(self.object.source.entity.project.pk,)))
     def get_headline(self):
         """
         Set headline based on communication.
         """
         return "Update communication %s" % self.object
 class CommunicationDeleteView(SetHeadlineMixin, MultiplePermissionsRequiredMixin, DeleteView):
+class CommunicationDeleteView(RedirectToNextMixin, SetHeadlineMixin, MultiplePermissionsRequiredMixin, DeleteView):
     """
     View for deleting an communication.
     """
     model = Communication
     template_name = "conntrackt/delete_form.html"
     # Required permissions.
     permissions = {
         "all": ("conntrackt.delete_communication",),
+        }
     # Raise authorisation denied exception for unmet permissions.
     raise_exception = True
     def post(self, *args, **kwargs):
         """
         Add a success message that will be displayed to the user to confirm the
         communication deletion.
         """
         messages.success(self.request, "Communication %s has been removed." % self.get_object(), extra_tags="alert alert-success")
         return super(CommunicationDeleteView, self).post(*args, **kwargs)
     def delete(self, *args, **kwargs):
         """
         Deletes the object. This method is overridden in order to obtain the
         entity ID for success URL.
         @TODO: Fix this once Django 1.6 comes out with fix from ticket 19044.
         """
         entity_id = self.request.GET.get("from_entity", None) or self.request.GET.get("to_entity", None) or self.get_object().source.entity.pk
         self.success_url = reverse("entity", args=(entity_id,))
         return super(CommunicationDeleteView, self).delete(*args, **kwargs)
     def get_headline(self):
         """
         Set headline based on communication.
         """
         return "Delete communication %s" % self.object
 @permission_required("conntrackt.view", raise_exception=True)
 def project_diagram(request, pk):
     """
     Custom view that returns response containing diagram of project
     communications.
     The diagram will include coloured entities, with directional lines
     connecting the source and destination end entities.
     The output format is SVG.
     Arguments:
         request - Request object.
         pk - Project ID for which the diagram should be generated.
     Returns:
         Response object that contains the project diagram rendered as SVG.
     """
     # Fetch the project.
     project = get_object_or_404(Project, pk=pk)
     # Generate the diagram.
     content = generate_project_diagram(project).create_svg()
     # Set the mime type.
     response = HttpResponse(content, mimetype='image/svg+xml')
     # Return the response object.
     return response

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