django-geoposition
A model field that can hold a geoposition (latitude/longitude), and corresponding admin/form widget.
Prerequisites
Starting with version 0.3, django-geoposition requires Django 1.8 or greater. If you need to support Django versions prior to 1.8 please use django-geoposition 0.2.3. For Django versions prior to 1.4.10 please use django-geoposition 0.1.5.
Installation
Use your favorite Python packaging tool to install
geopositionfrom PyPI, e.g.:pip install django-geoposition
Add
"geoposition"to yourINSTALLED_APPSsetting:INSTALLED_APPS = ( # … "geoposition", )Set your Google API key in you settings file:
GEOPOSITION_GOOGLE_MAPS_API_KEY = 'YOUR_API_KEY'
API keys may be obtained here: https://developers.google.com/maps/documentation/javascript/get-api-key
If you are still using Django <1.3, you are advised to install django-staticfiles for static file serving.
Usage
django-geoposition comes with a model field that makes it pretty easy to add a geoposition field to one of your models. To make use of it:
In your
myapp/models.py:from django.db import models from geoposition.fields import GeopositionField class PointOfInterest(models.Model): name = models.CharField(max_length=100) position = GeopositionField()This enables the following simple API:
>>> from myapp.models import PointOfInterest >>> poi = PointOfInterest.objects.get(id=1) >>> poi.position Geoposition(52.522906,13.41156) >>> poi.position.latitude 52.522906 >>> poi.position.longitude 13.41156
Form field and widget
Admin
If you use a GeopositionField in the admin it will automatically show a Google Maps widget with a marker at the currently stored position. You can drag and drop the marker with the mouse and the corresponding latitude and longitude fields will be updated accordingly.
It looks like this:
Regular Forms
Using the map widget on a regular form outside of the admin requires just a little more work. In your template make sure that
- jQuery is included
- the static files (JS, CSS) of the map widget are included (just use
{{ form.media }})
Example:
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8/jquery.min.js"></script>
<form method="POST" action="">{% csrf_token %}
{{ form.media }}
{{ form.as_p }}
</form>
Settings
You can customize the MapOptions and MarkerOptions used to initialize the map and marker in JavaScript by defining GEOPOSITION_MAP_OPTIONS or GEOPOSITION_MARKER_OPTIONS in your settings.py.
Example:
GEOPOSITION_MAP_OPTIONS = {
'minZoom': 3,
'maxZoom': 15,
}
GEOPOSITION_MARKER_OPTIONS = {
'cursor': 'move'
}
Please note that you cannot use a value like new google.maps.LatLng(52.5,13.4) for a setting like center or position because that would end up as a string in the JavaScript code and not be evaluated. Please use Lat/Lng Object Literals for that purpose, e.g. {'lat': 52.5, 'lng': 13.4}.
You can also customize the height of the displayed map widget by setting GEOPOSITION_MAP_WIDGET_HEIGHT to an integer value (default is 480).
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