Django. Pass variable from view to template - django

Question

I want to pass variable appuser to template and I don't understand how to do it.
I have tried to use kwargs.update but it still doesn't work.
I have a view:
class CausesView(AjaxFormView):
appuser = None
causes = []
cause_allocation_set = None
def prepare_request(self, request, *args, **kwargs):
self.causes = Cause.objects.filter(is_main_cause = True)
self.appuser = AppUser.get_login_user(request)
self.cause_allocation_set = set([r.cause_id for r in self.appuser.current_cause_save_point.cause_allocations_list])
def prepare_context(self, request, context, initial):
initial.update(
causes = self.cause_allocation_set,
appuser = self.appuser,
)
def prepare_form(self, request, form):
form._set_choices("causes", [(r.id, r.title) for r in self.causes])
def custom_context_data(self, request, **kwargs):
kwargs.update(
special_test = "dsf"
)
return kwargs
def process_form(self, request, form):
data = form.cleaned_data
try:
with transaction.atomic():
if self.cause_allocation_set != set(data.get('causes')):
self.appuser.save_causes(data.get('causes'))
except Exception as e:
message = "There was an error with saving the data: " + str(e.args)
return AjaxErrorResponse({'title':"Error", 'message':message})
return AjaxSuccessResponse('Causes Saved')
And I have a form:
class CauseForm(AjaxForm):
causes = forms.TypedMultipleChoiceField(label="Select Causes", choices = (), required = False, coerce = int,
widget = forms.CheckboxSelectMultiple())
def clean(self):
cleaned_data = super(CauseForm, self).clean()
causes = cleaned_data.get('causes')
validation_errors = []
if not causes is None and not len(causes):
validation_errors.append(forms.ValidationError("At least one Cause is required"))
if len(validation_errors):
raise forms.ValidationError(validation_errors)
return cleaned_data
How can I get variable appuser in temlpate?
For example:
{{ appuser.name }}
doesn't work.

Answer 1

Read How to use get_context_data in django
and
https://docs.djangoproject.com/en/1.9/ref/class-based-views/mixins-single-object/#django.views.generic.detail.SingleObjectMixin.get_context_data
Here is example of how you can do this
class CausesView(AjaxFormView):
...
def get_context_data(self, **kwargs):
context_data = super(CausesView, self).get_context_data(**kwargs)
context_data['appuser'] = self.appuser
return context_data