Django and Folium integration

问题

Django newbie here: my aim is to integrate Folium to an html page. so what I have at the moment:

polls/views.py

def show_map(request):  
    #creation of map comes here + business logic
    m = folium.Map([51.5, -0.25], zoom_start=10)
    test = folium.Html('<b>Hello world</b>', script=True)
    popup = folium.Popup(test, max_width=2650)
    folium.RegularPolygonMarker(location=[51.5, -0.25], popup=popup).add_to(m)

    context = {'my_map': m}

    return render(request, 'polls/show_folium_map.html', context)

polls/urls.py

urlpatterns = [   
       path('show_my_map', views.show_map, name='show_map'),

]

and show_folium_map.html

 <h1>map result comes here</h1>
 {{ my_map }}

problem is that I get the 'to_string' value of the map (I promise you I saw that coming). So how can I integrate the map in such way that I can actually see the map and also define the size?

回答1:

You can get the html as a string by triggering the rendering on the (internal) parent of Map:

m = folium.Map()
html: str = m.get_root().render()

Note that this returns a full html page, so you may need to put it in an iframe.

Alternatively, you can render the head, body and script parts separately. That way you can put each part on your page where it belongs and you don't need an iframe:

m = folium.Map()
html_head: str = m.get_root().header.render()
html_body: str = m.get_root().html.render()
html_script: str = m.get_root().script.render()

回答2:

In order to really include folium into custom django template you have to render your figure first before adding it to context (This will recursivly load all parts of the map into the figure). Afterwards in your template, you have to access header, html and script parts of figure seperatly by calling their render function. Additionally, those parts have to marked as "safe" by django template tag in order to allow html insertion. See example below.

Example:

views.py:

import folium

from django.views.generic import TemplateView


class FoliumView(TemplateView):
    template_name = "folium_app/map.html"

    def get_context_data(self, **kwargs):
        figure = folium.Figure()
        m = folium.Map(
            location=[45.372, -121.6972],
            zoom_start=12,
            tiles='Stamen Terrain'
        )
        m.add_to(figure)

        folium.Marker(
            location=[45.3288, -121.6625],
            popup='Mt. Hood Meadows',
            icon=folium.Icon(icon='cloud')
        ).add_to(m)

        folium.Marker(
            location=[45.3311, -121.7113],
            popup='Timberline Lodge',
            icon=folium.Icon(color='green')
        ).add_to(m)

        folium.Marker(
            location=[45.3300, -121.6823],
            popup='Some Other Location',
            icon=folium.Icon(color='red', icon='info-sign')
        ).add_to(m)
        figure.render()
        return {"map": figure}

templates/folium_app/map.html:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    {{map.header.render|safe}}
</head>
<body>
  <div><h1>Here comes my folium map:</h1></div>
  {{map.html.render|safe}}
  <script>
    {{map.script.render|safe}}
  </script>
</body>
</html>

来源：https://stackoverflow.com/questions/50517620/django-and-folium-integration

标签

python

django

maps

folium