print raw sql queries from django

django_test.py

from django.db.backends import util, BaseDatabaseWrapper

class LoggingCursorWrapper(util.CursorDebugWrapper):
    def execute(self, sql, *args):
        print sql
        return super(LoggingCursorWrapper, self).execute(sql, *args) if self.cursor.__class__ == util.CursorDebugWrapper else self.cursor.execute(sql, *args)

def create_wrapper_factory(old_cursor):
    def cursor(self, *args, **kwargs):
        return LoggingCursorWrapper(old_cursor(self, *args, **kwargs), self)

    return cursor

def show_sql():
    BaseDatabaseWrapper.cursor = create_wrapper_factory(BaseDatabaseWrapper.cursor)