Yii 框架 - 从其他模型中获取字段值 [英] Yii framework - picking up field value from other model

问题描述

我一直在努力解决这个问题，我有两个模型并用一个模型在 Cgridview 中显示数据，这个模型包含一些 id，其值在不同的表中

I have been struggling with this, i have two models and showing data in Cgridview with one model, this model contains some id's whose values are in different table

所以，我添加了

'value'=> 'TblAreaoflaw::model()->FindByPk($data->typeoflaw)->areaoflaw'

'value'=> 'TblAreaoflaw::model()->FindByPk($data->typeoflaw)->areaoflaw'

这是给这个错误

试图获取非对象的属性"

"Trying to get property of non-object"

可能是由于这个原因，TblAreaoflaw 中不存在某些记录.难道我们不能通过isset检查这一行吗?

Might be due to this reason that the some records doesn't exist in the TblAreaoflaw. Can't we check in this line through isset?

当我放置静态值时，它运行良好，例如

When i put static value, it work well, like

'value'=> 'TblAreaoflaw::model()->FindByPk(5)->areaoflaw',

'value'=> 'TblAreaoflaw::model()->FindByPk(5)->areaoflaw',

有人可以帮忙吗

非常感谢

推荐答案

你得到的错误是因为这个表达式 TblAreaoflaw::model()->FindByPk($data->typeoflaw)正在返回 null.这意味着您正在有效地尝试获取 null->areaoflaw 这将不起作用(这就是错误消息 试图获取非对象的属性"澄清).

The error you get is because this expression TblAreaoflaw::model()->FindByPk($data->typeoflaw) is returning null. This means that you are effectively trying to get null->areaoflaw which won't work (this is what the error message "Trying to get property of non-object" clarifies).

我最好的猜测是 $data->typeoflaw 为 TblAreaoflaw 模型返回一个不存在的主键.

My best guess is that $data->typeoflaw returns a non-existing primary key for the TblAreaoflaw model.

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