id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
26893	Database creation failed using PostGis and Django	Surbier Christophe	nobody	"I'm trying to create my database tables (python manage.py migrate) using Postgis. However it fails because the driver try to connect do default database ""postgres"" which is not my default name. I'm using django==1.8 and psycopg2==2.6.2 

If i look the documentation of psycopg (http://initd.org/psycopg/docs/module.html) The basic connection parameters are:

dbname – the database name (only in the dsn string)
database – the database name (only as keyword argument)
user – user name used to authenticate
password – password used to authenticate
host – database host address (defaults to UNIX socket if not provided)
port – connection port number (defaults to 5432 if not provided)
Here is my database connection: 


{{{
DATABASES = {
 'default': {
 'ENGINE': 'django.contrib.gis.db.backends.postgis', 
 'NAME': '<mydatabase>',
 'USER': '<myuser>',
 'PASSWORD': '<mypassword>',
 'HOST':  ‘bdsn15qbq8xaqoa-postgresql.services.clever-cloud.com'
 'PORT': '5432', 
 'URI':'postgis://myuser:mypassword@bdsn15qbq8xaqoa-postgresql.services.clever-cloud.com:5432/bdsn15qbq8xaqoa'
}
}
}}}

I have added some trace to the connexion and as we can see, the driver uses postgres as database name instead of the one specified in the config file.

[('dbname', '**postgres**'), ('user', 'myuser'), ('password', 'mypassword'), ('host', 'bdsn15qbq8xaqoa-postgresql.services.clever-cloud.com'), ('port', '5432’)]
After some research, i have edited the file :

 vi django/db/backends/postgresql_psycopg2/base.py


Function : 


{{{
def get_connection_params(self):
        settings_dict = self.settings_dict
        # None may be used to connect to the default 'postgres' db
        if settings_dict['NAME'] == '':
            from django.core.exceptions import ImproperlyConfigured
            raise ImproperlyConfigured(
                ""settings.DATABASES is improperly configured. ""
                ""Please supply the NAME value."")
        conn_params = {
            'database': settings_dict['NAME'] or 'postgres',
        }
        print settings_dict
        conn_params.update(settings_dict['OPTIONS'])
        conn_params.pop('isolation_level', None)
        if settings_dict['USER']:
            conn_params['user'] = settings_dict['USER']
        if settings_dict['PASSWORD']:
            conn_params['password'] = force_str(settings_dict['PASSWORD'])
        if settings_dict['HOST']:
            conn_params['host'] = settings_dict['HOST']
        if settings_dict['PORT']:
            conn_params['port'] = settings_dict['PORT']
        return conn_params
}}}

and added:
     
{{{
  if settings_dict['DBNAME']:
            conn_params['dbname'] = settings_dict['DBNAME']
}}}



Now if i relaunch the database creation : python manage.py migrate it is working fine using the good connection URI. 

[('dbname', '**mydatabase**'), ('user', 'myuser'), ('password', 'mypassword'), ('host', 'bdsn15qbq8xaqoa-postgresql.services.clever-cloud.com'), ('port', '5432’) 

Thanks a lot 
Christophe"	Bug	closed	GIS	1.8	Normal	worksforme			Unreviewed	0	0	0	0	0	0