Crispy Form VariableDoesNotExist on Django

Question

For crispy form on Django, I keep getting VariableDoesNotExist at / Failed lookup for key [form] in u\'[{\\\'False\\\': False, \\\'None\\\': None,.....<

Answer 1

I came across the VariableDoesNotExist problem as well with Failed lookup for key [form], but for me the problem was that I mistakenly used generic.DetailView as base class instead of generic.UpdateView.

Changing to UpdateView fixed the problem.

class MyUpdateView(generic.UpdateView):

    template_name = "object_update.html"
    model = MyModel
    form_class = MyCreateForm

Answer 2

The first argument to the crispy template tag is the name of the context variable where Crispy Forms expects the Form instance. So you need to somehow get a Form instance in your template context. If you were using this form in a view, you could do something like

def yourview(request):
    return TemplateResponse(request, "yourtemplate.html", {'form': LoginForm()})

If you want to have that form on many different pages, I'd suggest an inclusion tag:

@register.inclusion_tag('path/to/login_form.html')
def display_login_form():
    return {'form': LoginForm()}

And in your template:

{% load your_template_tags %}
{% display_login_form %}

(see also the usual setup procedure for custom template tags)