1 from django.core.management.base import NoArgsCommand, CommandError

     2 

     3 class Command(NoArgsCommand):

     4     help = "Runs the command-line client for the current DATABASE_ENGINE."

     5 

     6     requires_model_validation = False

     7 

     8     def handle_noargs(self, **options):

     9         from django.db import connection

    10         try:

    11             connection.client.runshell()

    12         except OSError:

    13             # Note that we're assuming OSError means that the client program

    14             # isn't installed. There's a possibility OSError would be raised

    15             # for some other reason, in which case this error message would be

    16             # inaccurate. Still, this message catches the common case.

    17             raise CommandError('You appear not to have the %r program installed or on your path.' % \

    18                 connection.client.executable_name)