django-google-maps-widget

django-google-maps-widget is a simple library that provides the basic hooks into Google Maps Platform for use in Django models from Django version 4.2+. Supports Python 3.9+. Forked from this project originally authored by @madisona, with adaptation to the modern Python environment.

This library is useful to allow someone from the admin panels to type a freeform address, have the address geocoded on change and plotted on the map. If the location is not 100% correct, the user can drag the marker to the correct spot and the geo coordinates will update.

Usage

• Include the django_google_maps_widget app in your settings.py

• Add your Google Maps API Key in your settings.py as GOOGLE_MAPS_API_KEY

• Add your Google Maps map ID in your settings.py as GOOGLE_MAPS_MAP_ID (recommended). Map ID is necessary for the map to function and is injected via field attribute, but you can provide this attribute however you want.

• Create a model that has both an address field and geolocation field:

  from django.db import models
  from django_google_maps_widget import fields as map_fields
  
  class Rental(models.Model):
      address = map_fields.AddressField(max_length=200)
      geolocation = map_fields.GeoLocationField(max_length=100)

• In the admin.py, include the following as a formfield_override:

  from django.contrib import admin
  from django_google_maps_widget import widgets as map_widgets
  from django_google_maps_widget import fields as map_fields
  
  class RentalAdmin(admin.ModelAdmin):
      formfield_overrides = {
          map_fields.AddressField: {
           "widget": map_widgets.GoogleMapsAddressWidget(attrs={
              "mapid": settings.GOOGLE_MAPS_MAP_ID
           })
         },
      }

• To change the map type (hybrid by default), you can add an html attribute on the AddressField widget. The list of allowed values is: hybrid, roadmap, satellite, terrain

  from django.contrib import admin
  from django_google_maps_widget import widgets as map_widgets
  from django_google_maps_widget import fields as map_fields
  
  class RentalAdmin(admin.ModelAdmin):
      formfield_overrides = {
          map_fields.AddressField: {
            "widget": map_widgets.GoogleMapsAddressWidget(attrs={"data-map-type": "roadmap"})},
      }

• To change the autocomplete options, you can add an html attribute on the AddressField widget. See https://developers.google.com/maps/documentation/javascript/places-autocomplete#add_autocomplete for a list of available options

  import json from django.contrib import admin
  from django_google_maps_widget import widgets as map_widgets
  from django_google_maps_widget import fields as map_fields
  
  class RentalAdmin(admin.ModelAdmin): formfield_overrides = {
      map_fields.AddressField: { "widget":
      map_widgets.GoogleMapsAddressWidget(attrs={
        "data-autocomplete-options": json.dumps({ "types": ["geocode",
        "establishment"], "componentRestrictions": {
                    "country": "us"
                }
            })
        })
      },
  }

That should be all you need to get started.

It can be useful to make the geolocation field readonly in the admin so a user doesn't accidentally change it to a nonsensical value. There is validation on the field, so you can't enter an incorrect value, but you could enter something that is not even close to the address you intended.

When you're displaying the address back to the user, just request the map using the geocoordinates that were saved in your model.