Flask - 访问返回字典的接口报错:The view function did not return a valid response. The return type must be a string, tuple, Response instance, or WSGI callable, but it was a dict.

Flask - 访问返回字典的接口报错:The view function did not return a valid response. The return type must be a string, tuple, Response instance, or WSGI callable, but it was a dict.

背景有一个 Flask 项目,然后有一个路由返回的是 dict通过浏览器访问,结果报错关键报错信息TypeError: 'dict' object is not callableThe view function did not return a valid response. The return...

warning:date()[function.date]:it is not safe to rely on the system' timezone setting

  warning:date()[function.date]:it is not safe to rely on the system' timezone setting 解决办法:   # vi /usr/local/php/etc/php.ini [Date] date.t...

ORA-04091: table is mutating, trigger/function may not see it

今天在论坛里发现了一个关于ORA-04091的老帖子,收获良多,特此整理一下 关于ORA-04091: table is mutating, trigger/function may not see it的分析 当DML操作触发trigger的时候,如果trigger的程序块中需要对当前表进行修改或...

错误"ORA-04091: table is mutating, trigger/function may not see it"的原因以及解决办法

错误的原因 该错误是在编写trigger时常遇到的问题,其根本原因是由于对本表的操作造成的。对于使用了for each row 的触发器,做了DML操作(delete,update,insert),还没有提交时,是不允许其他PL/SQL对本表的DML操作,以及查询,因为此时数据不一致。 解决办法: ...

ORA-04091: table xxxx is mutating, trigger/function may not see it

今天同事让我看一个 触发器为什么老是报错,当执行DML语句触发触发器后,会报ORA-04091错误:ORA-04091: table xxxx is mutating, trigger/function may not see it 。对应的中文错误提示为:ORA-04091: 表 xxx发生了变化...

关于错误:"ORA-04091: table is mutating, trigger/function may not see it"的分析(触发器操作自身表)

在写trigger的时候,经常会遇到这种情况 当在程序块中需要对trigger本表进行修改或查询的时候,系统会提示错误:  ORA-04091: table is mutating, trigger/function may not see it 关于这个错误,其实是由于对本表的...

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