django-loci
Reusable django-app for storing GIS and indoor coordinates of objects.
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Dependencies
- Python >= 3.8
- GeoDjango (see GeoDjango Install Instructions)
- One of the databases supported by GeoDjango
Compatibility Table
django-loci Python version 0.2 2.7 or >=3.4 0.3 - 0.4 >=3.6 1.0 >=3.7 1.1 >=3.8 dev >=3.8
Install stable version from pypi
Install from pypi:
pip install django-loci
Install development version
First of all, install the dependencies of GeoDjango:
- Geospatial libraries
- Spatial database, for development we use Spatialite, a spatial extension of sqlite
Install tarball:
pip install https://github.com/openwisp/django-loci/tarball/master
Alternatively you can install via pip using git:
pip install -e git+git://github.com/openwisp/django-loci#egg=django_loci
If you want to contribute, install your cloned fork:
git clone [email protected]:<your_fork>/django-loci.git
cd django_loci
python setup.py develop
Setup (integrate in an existing django project)
First of all, set up your database engine to one of the spatial databases suppported by GeoDjango.
Add django_loci
and its dependencies to INSTALLED_APPS
in the
following order:
INSTALLED_APPS = [
# ...
"django.contrib.gis",
"django_loci",
"django.contrib.admin",
"leaflet",
"channels"
# ...
]
Configure CHANNEL_LAYERS
according to your needs, a sample
configuration can be:
ASGI_APPLICATION = "django_loci.channels.asgi.channel_routing"
CHANNEL_LAYERS = {
"default": {
"BACKEND": "channels.layers.InMemoryChannelLayer",
},
}
Now run migrations:
./manage.py migrate
Troubleshooting
Common issues and solutions when installing GeoDjango.
Unable to load the SpatiaLite library extension
If you get the following exception:
django.core.exceptions.ImproperlyConfigured: Unable to load the SpatiaLite library extension
You need to specify the SPATIALITE_LIBRARY_PATH
in your settings.py
as explained in the django documentation regarding how to install and
configure
spatialte.
Issues with other geospatial libraries
Please refer to the geodjango documentation on troubleshooting issues related to geospatial libraries.
Settings
LOCI_FLOORPLAN_STORAGE
type: str
default: django_loci.storage.OverwriteStorage
The django file storage class used for uploading floorplan images.
The filestorage can be changed to a different one as long as it has an
upload_to
class method which will be passed to
FloorPlan.image.upload_to
.
To understand the details of this statement, take a look at the code of django_loci.storage.OverwriteStorage.
DJANGO_LOCI_GEOCODER
type: str
default: ArcGIS
Service used for geocoding and reverse geocoding.
Supported geolocation services:
ArcGIS
Nominatim
GoogleV3
(Google Maps v3)
DJANGO_LOCI_GEOCODE_FAILURE_DELAY
type: int
default: 1
Amount of seconds between geocoding retry API calls when geocoding requests fail.
DJANGO_LOCI_GEOCODE_RETRIES
type: int
default: 3
Amount of retry API calls when geocoding requests fail.
DJANGO_LOCI_GEOCODE_API_KEY
type: str
default: None
API key if required (eg: Google Maps).
System Checks
geocoding
Use to check if geocoding is working as expected or not.
Run this checks with:
./manage.py check --deploy --tag geocoding
Extending django-loci
django-loci provides a set of models and admin classes which can be imported, extended and reused by third party apps.
To extend django-loci, you MUST NOT add it to
settings.INSTALLED_APPS
, but you must create your own app (which goes
into settings.INSTALLED_APPS
), import the base classes of django-loci
and add your customizations.
Extending models
This example provides an example of how to extend the base models of django-loci by adding a relation to another django model named [Organization]{.title-ref}.
# models.py of your app
from django.db import models
from django_loci.base.models import (
AbstractFloorPlan,
AbstractLocation,
AbstractObjectLocation,
)
# the model ``organizations.Organization`` is omitted for brevity
# if you are curious to see a real implementation, check out django-organizations
class OrganizationMixin(models.Model):
organization = models.ForeignKey("organizations.Organization")
class Meta:
abstract = True
class Location(OrganizationMixin, AbstractLocation):
class Meta(AbstractLocation.Meta):
abstract = False
def clean(self):
# your own validation logic here...
pass
class FloorPlan(OrganizationMixin, AbstractFloorPlan):
location = models.ForeignKey(Location)
class Meta(AbstractFloorPlan.Meta):
abstract = False
def clean(self):
# your own validation logic here...
pass
class ObjectLocation(OrganizationMixin, AbstractObjectLocation):
location = models.ForeignKey(
Location, models.PROTECT, blank=True, null=True
)
floorplan = models.ForeignKey(
FloorPlan, models.PROTECT, blank=True, null=True
)
class Meta(AbstractObjectLocation.Meta):
abstract = False
def clean(self):
# your own validation logic here...
pass
Extending the admin
Following the previous [Organization]{.title-ref} example, you can avoid duplicating the admin code by importing the base admin classes and registering your models with them.
But first you have to change a few settings in your settings.py
, these
are needed in order to load the admin templates and static files of
django-loci even if it\'s not listed in settings.INSTALLED_APPS
.
Add django.forms
to INSTALLED_APPS
, now it should look like the
following:
INSTALLED_APPS = [
# ...
"django.contrib.gis",
"django_loci",
"django.contrib.admin",
# ↓
"django.forms", # <-- add this
# ↑
"leaflet",
"channels"
# ...
]
Now add EXTENDED_APPS
after INSTALLED_APPS
:
INSTALLED_APPS = [
# ...
]
EXTENDED_APPS = ("django_loci",)
Add openwisp_utils.staticfiles.DependencyFinder
to
STATICFILES_FINDERS
:
STATICFILES_FINDERS = [
"django.contrib.staticfiles.finders.FileSystemFinder",
"django.contrib.staticfiles.finders.AppDirectoriesFinder",
"openwisp_utils.staticfiles.DependencyFinder",
]
Add openwisp_utils.loaders.DependencyLoader
to TEMPLATES
:
TEMPLATES = [
{
"BACKEND": "django.template.backends.django.DjangoTemplates",
"DIRS": [],
"OPTIONS": {
"loaders": [
"django.template.loaders.filesystem.Loader",
"django.template.loaders.app_directories.Loader",
# add the following line
"openwisp_utils.loaders.DependencyLoader",
],
"context_processors": [
"django.template.context_processors.debug",
"django.template.context_processors.request",
"django.contrib.auth.context_processors.auth",
"django.contrib.messages.context_processors.messages",
],
},
}
]
Last step, add FORM_RENDERER
:
FORM_RENDERER = "django.forms.renderers.TemplatesSetting"
Then you can go ahead and create your admin.py
file following the
example below:
# admin.py of your app
from django.contrib import admin
from django_loci.base.admin import (
AbstractFloorPlanAdmin,
AbstractFloorPlanForm,
AbstractFloorPlanInline,
AbstractLocationAdmin,
AbstractLocationForm,
AbstractObjectLocationForm,
AbstractObjectLocationInline,
)
from django_loci.models import FloorPlan, Location, ObjectLocation
class FloorPlanForm(AbstractFloorPlanForm):
class Meta(AbstractFloorPlanForm.Meta):
model = FloorPlan
class FloorPlanAdmin(AbstractFloorPlanAdmin):
form = FloorPlanForm
class LocationForm(AbstractLocationForm):
class Meta(AbstractLocationForm.Meta):
model = Location
class FloorPlanInline(AbstractFloorPlanInline):
form = FloorPlanForm
model = FloorPlan
class LocationAdmin(AbstractLocationAdmin):
form = LocationForm
inlines = [FloorPlanInline]
class ObjectLocationForm(AbstractObjectLocationForm):
class Meta(AbstractObjectLocationForm.Meta):
model = ObjectLocation
class ObjectLocationInline(AbstractObjectLocationInline):
model = ObjectLocation
form = ObjectLocationForm
admin.site.register(FloorPlan, FloorPlanAdmin)
admin.site.register(Location, LocationAdmin)
Extending channel consumers
Extend the channel consumer of django-loci in this way:
from django_loci.channels.base import BaseLocationBroadcast
from ..models import Location # your own location model
class LocationBroadcast(BaseLocationBroadcast):
model = Location
Extending AppConfig
You may want to reuse the AppConfig
class of django-loci too:
from django_loci.apps import LociConfig
class MyConfig(LociConfig):
name = "myapp"
verbose_name = _("My custom app")
def __setmodels__(self):
from .models import Location
self.location_model = Location
Installing for development
Install sqlite:
sudo apt-get install sqlite3 libsqlite3-dev libsqlite3-mod-spatialite gdal-bin
Install your forked repo:
git clone git://github.com/<your_fork>/django-loci
cd django-loci/
python setup.py develop
Install test requirements:
pip install -r requirements-test.txt
Create database:
cd tests/
./manage.py migrate
./manage.py createsuperuser
Launch development server and SMTP debugging server:
./manage.py runserver
You can access the admin interface at http://127.0.0.1:8000/admin/.
Run tests with:
# pytests is used to test django-channels
./runtests.py && pytest
Contributing
- Announce your intentions in the OpenWISP Mailing List
- Fork this repo and install it
- Follow PEP8, Style Guide for Python Code
- Write code
- Write tests for your code
- Ensure all tests pass
- Ensure test coverage does not decrease
- Document your changes
- Send pull request
Changelog
See CHANGES.
License
See LICENSE.