A map in a form is not shown

I try to add my form into an admin panel. I already have django-leaflet and it works normal via LeafletGeoAdmin.

But I need to add my form without a model.

I define a form:

from leaflet.forms.fields import PointField as PointFieldLL
from django import forms

class MarkerPostForm(forms.Form):
    user_from = forms.CharField(label="User, marker's owner")
    content = PointFieldLL()

A view:

@csrf_exempt
@alt_login_required
def post_marker_from_admin(request, v=None, user=None):
    if user.is_staff is False:
        return response_message('You are not admin', 403)
    if request.method == 'POST':
        form = MarkerPostForm(request.POST)
        if form.is_valid():
            content = form.cleaned_data['content']
            user_from = form.cleaned_data['user_from']
            data = { "us_from": user_from,
                     "marker": content}
            return response_json(data, 200)
    else:
        form = MarkerPostForm(initial={'user_from': 'spont'})
        return render(request, 'send_message_from_admin.html', {'form': form})

An extension of admin template:

{% extends "admin/base_site.html" %}
{% load i18n admin_static %}
{% load static %}
{% load leaflet_tags %}

{% block title %}Post marker{% endblock %}
{% block extrahead %}
    {% leaflet_js plugins="ALL" %}
    {% leaflet_css plugins="ALL" %}
{% endblock %}

{% block content %}

<!-- <body> -->
<form action="{% url 'manage_app.views_manage_app.post_marker_from_admin' v='v1.0' %}" method="post">
    {% csrf_token %}
    {{ form }}
    <input type="submit" value="Post marker" />
</form>
<!-- </body> -->
{% endblock %}
<!-- </html> -->

Result: I see my form, but leaflet map is not shown.

Could you tell me what I did wrong?

makinacorpus / django-leaflet

A map in a form is not shown #163