Serializer still depends on GDAL?

[flesser]

I encountered a strange issue. On my development machine, everything worked fine. When I tried to run my project on another computer, I suddenly got errors like the following when saving a PointField:

>>> self.pointField = {'type': 'Point', 'coordinates': [lon, lat]}
>>> self.save()
[2016-28-23 20:28:53] ERROR [django.contrib.gis:45] Error creating geometry from value '{
  "type":"Point",
  "coordinates":[
    7.09,
    50.72
  ]
}' (Initializing geometry from JSON input requires GDAL.)

After performing a sudo apt-get install gdal-bin (which also installed a whole bunch of other geospatial libraries), the errors were gone. But the whole point of using django-geojson is that I don't need to install geospatial libraries just to store some Points and have nice Leaflet widgets.

On both computers, Django runs in the same freshly installed Python3-virtualenv:

$ pip freeze
Django==1.9.2
PyYAML==3.11
crispy-forms-foundation==0.5.3
django-crispy-forms==1.6.0
django-geojson==2.9.0
django-leaflet==0.18.0
jsonfield==1.0.3
mysqlclient==1.3.7
pytz==2015.7
six==1.10.0
xlwt==1.0.0

[leplatrem]

That's a string from contrib.gis indeed!

Can you check the type of your PointField ? It should be djgeojson.fields.PointField.

[ghost]

I can confirm this, had the same issue on arch after installing gdal all works fine!

[dzh21]

the same problem, after sudo aptitude install gdal-bin all good

[maltem-za]

Confirmed - with the same solution as mentioned above.

Not really surprising considering the following import pattern is used throughout django-geojson & django-leaflet:

# from django-geojson serializers.py
try:
    from django.contrib.gis.geos import WKBWriter
    from django.contrib.gis.geos import GEOSGeometry
    from django.contrib.gis.db.models.fields import GeometryField
except (ImportError, ImproperlyConfigured):
    from .nogeos import WKBWriter
    from .nogeos import GEOSGeometry
    from .fields import GeometryField

As contrib.gis comes with Django I don't see how this was intended to prefer the nogeos stuff. Perhaps contrib.gis used to raise ImproperlyConfigured when gdal isn't present? However django-leaflet only handles ImportError in all the places I looked...

[cgestes]

Encountered the same since I updated to 2.11.0 :(

(the bug is not present in 2.10.0)

[leplatrem]

You can check the diff
2.10.0...2.11.0

@Gagaro could you update the Github releases page please? And also, use PRs where Travis tests remain green instead of committing to master (easier to follow regressions etc.). Thanks!

[Gagaro]

Travis tests are green, the only PR I merged without travis was the pip install one which was very simple (but still needed travis...).

And yes I should update the releases.

[coredumperror]

Is there any chance that this issue could be resolved? I just started using django-geojson, and I'm getting the same error as @flesser for apparently the same reason. I don't want to install gdal just to make an import I don't plan to use not crash. I cannot downgrade to 2.10 because my project uses Django 2.x.