django查看执行的sql查询语句

对于一些比较复杂的查询在做优化时，通常需要查看下django底层执行的sql语句。

例如:

data = Tasks.objects.select_related().filter(~Q(pk=4) & (~Q(reviewer__contains='pengpai(彭湃)') | ~Q(handler__contains='pengpai(彭湃)') | ~Q(director__contains='pengpai(彭湃)')))

可以通过这种方法：

data = Tasks.objects.select_related().filter(~Q(pk=4) & (~Q(reviewer__contains='pengpai(彭湃)') | ~Q(handler__contains='pengpai(彭湃)') | ~Q(director__contains='pengpai(彭湃)'))).query.__str__()

结果如下

'SELECT `db_tasks`.`id`, `db_tasks`.`create_at`, `db_tasks`.`publisher`, `db_tasks`.`service_type`, `db_tasks`.`task_type`, `db_tasks`.`period`, `db_tasks`.`title`, `db_tasks`.`body`, `db_tasks`.`director`, `db_tasks`.`reviewer`, `db_tasks`.`handler`, `db_tasks`.`critical`, `db_tasks`.`finish_time`, `db_tasks`.`status`, `db_tasks`.`send_range`, `db_tasks`.`person_id`, `db_person`.`id`, `db_person`.`create_at`, `db_person`.`username`, `db_person`.`city`, `db_person`.`department`, `db_person`.`permission`, `db_person`.`group_id` FROM `db_tasks` INNER JOIN `db_person` ON (`db_tasks`.`person_id` = `db_person`.`id`) WHERE (NOT (`db_tasks`.`id` = 4) AND (NOT (`db_tasks`.`reviewer` LIKE BINARY %pengpai(彭湃)%) OR NOT (`db_tasks`.`handler` LIKE BINARY %pengpai(彭湃)%) OR NOT (`db_tasks`.`director` LIKE BINARY %pengpai(彭湃)%))) ORDER BY `db_tasks`.`create_at` DESC'