In Django how do I call a function in the template

Question

As you can see I am trying to create a function and use it in the template by calling it in the get_context_data

But when I refresh the page, it gives me the error: name 'sidebar' is not defined.

I think I might need to pass some variables into the sidebarFunction but I am not entirely sure.

HTML:

 {% if user.is_staff %}
 {% for client in sidebar %}
 <li>
 <!-- <a href="{% url 'public:client_detail' client.client.pk %}"> -->
 <p class="client-title" onclick="subNavDropDown(this)">{{ client.client }}</p>
 <!-- </a> -->
 </li>
 <ul class="sub-nav" id="{{ client.client }}-subnav">
 {% for project in client.projects %}
 <!-- Add a link to this -->
 <li class="sub-nav" id="project-dropdown-{{ project.pk }}">
 {{ project }}
 </li>
 {% endfor %}
 </ul>
 {% endfor %}
 <br>
 {% else %}
 {% for project in sidebar %}
 <li>
 <a href="{% url 'public:client_detail' client.pk %}">
 <p class="client-title"></p>{{ client }}</p>
 </a>
 </li>
 {% endfor %}
 {% endif %}

Python:

def get_context_data(self, **kwargs):
 context = super().get_context_data(**kwargs)
 client = self.request.user.groups.all()
 context["project"] = Project.objects.filter(client=self.get_object())
 context["projects"] = Project.objects.filter(client__in=client, active=True)
 context["sidebar"] = sidebar
 return context
 def sidebarFunction(self):
 if self.request.user.is_staff:
 sidebar = []
 for client in Client.objects.all():
 data = {
 "client": client,
 "projects": Project.objects.filter(client=client),
 }
 sidebar.append(data)
 else:
 sidebar = Project.objects.filter(client__in=client, active=True)

• dirkgroten: look at the line context["sidebar"] = sidebar. What is sidebar supposed to be here?

Answer 1

What you can do is call the sidebarFunction inside your get_context_data and the values returned from your sidebarFunction will be available in the template.

def get_context_data(self, **kwargs):
 context = super().get_context_data(**kwargs)
 client = self.request.user.groups.all()
 context["project"] = Project.objects.filter(client=self.get_object())
 context["projects"] = Project.objects.filter(client__in=client, active=True)
 context["sidebar"] = self.sidebarFunction()
 return context
def sidebarFunction(self):
 sidebar = []
 data = {}
 if self.request.user.is_staff:
 for client in Client.objects.all():
 data.update({
 "client": client,
 "projects": Project.objects.filter(client=client),
 })
 sidebar.append(data)
 else:
 data.update({'projects': Project.objects.filter(client__in=client, active=True)})
 sidebar.append(data)
 return sidebar

• bruno desthuilliers: the sidebarFunction() must also be changed to return the sidebar !
• bruno desthuilliers: @MaxLoyd in your snippet, this functions creates a local variable "sidebar" but doesn't return it to the caller. You have to add "return sidebar" at the end of the function for the whole thing to work.
• Higor Rossato: Thanks @brunodesthuilliers. Updated my answer