Fixed #17300 -- Prevented createcachetable from crashing when the cache table...

from django.core.cache.backends.db import BaseDatabaseCache

from django.core.management.base import LabelCommand

from django.db import connections, router, transaction, models, DEFAULT_DB_ALIAS

from django.db.utils import DatabaseError

class Command(LabelCommand):

    help = "Creates the table needed to use the SQL cache backend."

            full_statement.append('    %s%s' % (line, i < len(table_output)-1 and ',' or ''))

        full_statement.append(');')

        curs = connection.cursor()

        try:

            curs.execute("\n".join(full_statement))

        except DatabaseError, e:

            self.stderr.write(

                self.style.ERROR("Cache table '%s' could not be created.\nThe error was: %s.\n" %

                    (tablename, e)))

            transaction.rollback_unless_managed(using=db)

        else:

            for statement in index_output:

                curs.execute(statement)

            transaction.commit_unless_managed(using=db)

import hashlib

import os

import re

import StringIO

import tempfile

import time

import warnings

        self.cache = get_cache('db://%s?max_entries=30&cull_frequency=0' % self._table_name)

        self.perform_cull_test(50, 18)

    def test_second_call_doesnt_crash(self):

        err = StringIO.StringIO()

        management.call_command('createcachetable', self._table_name, verbosity=0, interactive=False, stderr=err)

        self.assertTrue("Cache table 'test cache table' could not be created" in err.getvalue())

DBCacheWithTimeZoneTests = override_settings(USE_TZ=True)(DBCacheTests)