django1/django/contrib/gis/db/backend/spatialite/creation.py

62 lines
2.3 KiB
Python

import os
from django.conf import settings
from django.core.management import call_command
from django.db import connection
def spatialite_init_file():
# SPATIALITE_SQL may be placed in settings to tell
# GeoDjango to use a specific user-supplied file.
return getattr(settings, 'SPATIALITE_SQL', 'init_spatialite-2.3.sql')
def create_test_spatial_db(verbosity=1, autoclobber=False, interactive=False):
"Creates a spatial database based on the settings."
# Making sure we're using PostgreSQL and psycopg2
if settings.DATABASE_ENGINE != 'sqlite3':
raise Exception('SpatiaLite database creation only supported on sqlite3 platform.')
# Getting the test database name using the SQLite backend's
# `_create_test_db`. Unless `TEST_DATABASE_NAME` is defined,
# it returns ":memory:".
db_name = connection.creation._create_test_db(verbosity, autoclobber)
# Closing out the current connection to the database set in
# originally in the settings. This makes it so `initialize_spatialite`
# function will be run on the connection for the _test_ database instead.
connection.close()
# Point to the new database
settings.DATABASE_NAME = db_name
connection.settings_dict["DATABASE_NAME"] = db_name
can_rollback = connection.creation._rollback_works()
settings.DATABASE_SUPPORTS_TRANSACTIONS = can_rollback
connection.settings_dict["DATABASE_SUPPORTS_TRANSACTIONS"] = can_rollback
# Finally, loading up the SpatiaLite SQL file.
load_spatialite_sql(db_name, verbosity=verbosity)
if verbosity >= 1:
print 'Creation of spatial database %s successful.' % db_name
# Syncing the database
call_command('syncdb', verbosity=verbosity, interactive=interactive)
def load_spatialite_sql(db_name, verbosity=1):
"""
This routine loads up the SpatiaLite SQL file.
"""
# Getting the location of the SpatiaLite SQL file, and confirming
# it exists.
spatialite_sql = spatialite_init_file()
if not os.path.isfile(spatialite_sql):
raise Exception('Could not find the SpatiaLite initialization SQL file: %s' % spatialite_sql)
# Opening up the SpatiaLite SQL initialization file and executing
# as a script.
sql_fh = open(spatialite_sql, 'r')
try:
cur = connection.cursor()
cur.executescript(sql_fh.read())
finally:
sql_fh.close()