配置Postgresql POSTGIS数据库

Question

First off, I am new to django. I am trying to use GeoLite(GeoIP2) datasets in my POSTGIS database in Django 1.10. When I attempt to configure the myapp/settings.py file, i get error messages.There seem to be database backends in different paths in the django directory;Can you please clarify why?

1. django\\contrib\\gis\\db\\backends\\postgis
2. django\\db\\backends

After activating my python3 virtual environment, when i try to set the default database in my settings.py file as postgresql('django.db.backends.postgresql'), i get an error:

AttributeError:”Database Operations’ object has no attribute ‘geo_db_type’.

When i try to use POSTGIS as my database engine (i set the GDAL_LIBRARY_PATH in my virtual environment), i get an error:

django.contrib.gis.db.backends.postgis' is not an available database backend. Try using 'django.db.backends.XXX', where XXX is one of 'mysql', 'oracle', 'postgresql',and 'sqlite'.
Error was: Cannot import name ‘GDALRaster’.

Can you suggest possible solutions to the above error messages? Thank you.

Answer 1

Installed GDAL from Christopher Gohlke's site (32 bit GDAL-2.0.3-cp35-cp35m-win32.whl)into the virtual environment. Download OSGEO4W (32 bit) and install the Express Web option. Create Environment Variables. Set the environment variables as below:

set PYTHON_ROOT=C:\\Python35-32 set GDAL_DATA=C:\\Program Files\\PostgreSQL\\9.6\\gdal-data set PROJ_LIB=C:\\Program Files\\PostgreSQL\\9.6\\share\\contrib\\postgis\\proj set PATH=%PATH%;%PYTHON_ROOT%;%OSGEO4W_ROOT%\\bin reg ADD "HKLM\\SYSTEM\\CurrentControlSet\\Control\\Session Manager\\Environment" /v Path /t REG_EXPAND_SZ /f /d "%PATH%" reg ADD "HKLM\\SYSTEM\\CurrentControlSet\\Control\\Session Manager\\Environment" /v GDAL_DATA /t REG_EXPAND_SZ /f /d "%GDAL_DATA%" reg ADD "HKLM\\SYSTEM\\CurrentControlSet\\Control\\Session Manager\\Environment" /v PROJ_LIB /t REG_EXPAND_SZ /f /d "%PROJ_LIB%"

I also set LD_LIBRARY_PATH as C:\\Python35-32\\myvenv_python3\\Lib\\site-packages\\osgeo. Then, the database is Improperly configured and cannot import 'GDALRaster' went away.From your django project directory, it would be possible to migrate now using: python manage.py migrate