54 lines
1.8 KiB
Python
54 lines
1.8 KiB
Python
import shutil
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from optparse import make_option
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import django.conf
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import django.db
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import django.db.transaction
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from django.core.management.base import NoArgsCommand, CommandError
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class Command(NoArgsCommand):
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help = "Backup the openslides database"
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option_list = NoArgsCommand.option_list + (
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make_option(
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"--destination", action="store",
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help="path to the backup database (will be overwritten)"),
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)
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def handle_noargs(self, *args, **kw):
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db_settings = django.conf.settings.DATABASES
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default = db_settings.get(django.db.DEFAULT_DB_ALIAS)
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if not default:
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raise CommandError("Default databases is not configured")
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if default.get("ENGINE") != "django.db.backends.sqlite3":
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raise CommandError(
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"Only sqlite3 databases can currently be backuped")
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src_path = default.get("NAME")
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if not src_path:
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raise CommandError("No path specified for default database")
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dest_path = kw.get("destination")
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if not dest_path:
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raise CommandError("--destination must be specified")
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self.do_backup(src_path, dest_path)
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@django.db.transaction.commit_manually
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def do_backup(self, src_path, dest_path):
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# perform a simple file-copy backup of the database
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# first we need a shared lock on the database, issuing a select()
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# will do this for us
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cursor = django.db.connection.cursor()
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cursor.execute("SELECT count(*) from sqlite_master")
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# now copy the file
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try:
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shutil.copy(src_path, dest_path)
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except IOError as e:
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raise CommandError("{0}\nDatabase backup failed!".format(e))
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# and release the lock again
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django.db.transaction.commit()
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