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django-easy-maps

This app makes it easy to display a map for given address in django templates. No API keys, manual geocoding, html/js copy-pasting or django model changes is needed.

The license is MIT.

Installation

pip install geopy
pip install django-easy-maps

Then add 'easy_maps' to INSTALLED_APPS and run ./manage.py syncdb (or ./manage.py migrate easy_maps if South is in use). Since there are some media files needed to be used, you have to collect the static files distributed with this application (using ./manage collectstatic).

Settings

If working on localhost you can run into Google Maps API lockdown. If this happens then create a EASY_MAPS_GOOGLE_KEY in your settings.py file:

EASY_MAPS_GOOGLE_KEY = "your-google-maps-api-key"

If you need a place where center the map when no address is inserted yet add the latitudine and longitude to the EASY_MAPS_CENTER* variables in your settings.py like the following:

EASY_MAPS_CENTER_LAT = -41.3
EASY_MAPS_CENTER_LON =  15.2

Usage

This app provides an easy_map template tag:

{% easy_map <address> [<width> <height>] [<zoom>] [using <template_name>] %}

Examples:

{% load easy_maps_tags %}

<!-- Default map with 300x400 dimensions -->
{% easy_map "Russia, Ekaterinburg, Mira 32" 300 400 %}

<!-- Variable address, custom detail level and custom template -->
{% easy_map address 200 200 5 using 'map.html' %}

The coordinates for map will be obtained using google geocoder on first access. Then they'll be cached in DB. Django's template caching can be used later in order to prevent DB access on each map render:

{% load easy_maps_tags cache %}

{% cache 600 my_map firm.address %}
    {% easy_map firm.address 300 400 %}
{% endcache %}

Customization

If the default map template is not sufficient then custom map template can be used. Examples:

{% easy_map address using 'map.html' %}
{% easy_map address 200 300 5 using 'map.html' %}

The template will have 'map' (it is the easy_maps.models.Address instance auto-created for passed address on first access), 'width', 'height' and 'zoom' variables. The outer template context is passed to rendered template as well.

The default template can be found here: https://bitbucket.org/kmike/django-easy-maps/src/tip/easy_maps/templates/easy_maps/map.html

You can start your own template from scratch or just override some blocks in the default template.

Please refer to http://code.google.com/apis/maps/documentation/javascript/ for detailed Google Maps JavaScript API help.

Address model

easy_maps.models.Address model has the following fields:

  • address - the requested address
  • computed_address - address returned by geocoder
  • longitude
  • latitude
  • geocode_error - True if geocoder wasn't able to handle the address

Address model should be considered implementation detail. Its purpose is to avoid using geocoder for each request, that's a kind of persistent cache. It is included in readme because information about available data can be useful for custom map templates.

Admin address preview

django-easy-maps provides basic widget that displays a map under the address field. It can be used in admin for map previews. Example usage:

from django import forms
from django.contrib import admin
from easy_maps.widgets import AddressWithMapWidget
from firms.models import Firm

class FirmAdmin(admin.ModelAdmin):
    class form(forms.ModelForm):
        class Meta:
            widgets = {
                'address': AddressWithMapWidget({'class': 'vTextField'})
            }

admin.site.register(Firm, FirmAdmin)

'address' field should be a CharField or TextField.

Contributing

If you've found a bug, implemented a feature or customized the template and think it is useful then please consider contributing. Patches, pull requests or just suggestions are welcome!

Source code: https://bitbucket.org/kmike/django-easy-maps/

Bug tracker: https://bitbucket.org/kmike/django-easy-maps/issues/new