Using bootstrap4 causes a VariableDoesNotExist exception with html5_required missing when displaying a form

• Package version: 1.7.2
• Django version: 2.2.4
• Python version: 3.7.4
• Template pack: (Optional) Bootstrap4

Description:

I tried to display a basic update form for my model, when I tried to test it and browsed to the endpoint, a VariableDoesNotExist Exception is thrown. I have to step through/continue the debugger to continue.

Preferably also include:

Error:

#MODEL
class Testmodel(models.Model):
    name = models.CharField('name', max_length=50)
    text = models.CharField('text', blank=True, max_length=50)
    created_at = models.DateTimeField(auto_now_add=True)
    last_updated = models.DateTimeField(auto_now=True)

# VIEW / FORM
class TestmodelForm(ModelForm):

    class Meta:
        model = Testmodel
        fields = ('name', 'text')
        # TODO: need to add selection dropdown and date picker


def test_view(request, *args, **kwargs):
    if request.method == "POST":
        form = TestmodelForm(request.POST)
        if form.is_valid():
            profile = form.save(commit=False)
            profile.save()
            # TODO: add message or redirect ?!
    else:
        form = TestmodelForm()
    return render(request, 'profile.html', {'form': form})


## PROFILE.HTML
{% extends 'base.html' %}
{% load crispy_forms_tags %}

{% block content %}

<h2>Profile</h2>
<form method="post">
  {% csrf_token %}
   {{ form|crispy }}
  <button class="btn btn-primary" type="submit">Update</button>
</form>
{% endblock %}

Output:

I think the required field should be marked with a red star and I assume its not and is related to the html5_required being missing?

Where and why is this key/variable missing? is this a bug? Am I doing something wrong? I literally created a naked project to test this issue.

Also at stackexchange with bit more details: https://stackoverflow.com/questions/57454907/crispy-forms-throws-variabledoesnotexist-error-failed-lookup-for-key-html5-requ

EDIT:

I changed in the template how the form is called to:

{% crispy form %}

which doesn’t cause the issue.

[carltongibson]

This is a VS Code issue. The VariableDoesNotExist exception is internal to the template rendering. (It’s not a bug…)

A quick search seems to suggest putting django: false in the debugger launch config. (Don’t know if that has other consequences…)

Can I ask you folks to report this to VS Code, or the authors of whatever extensions you’re using, since it should be addressed there.

[dehai]

it seams like a VS Code issue, need change "django": false on launch.json.