php Yii isNewRecord 在 beforeSave 中是假的？
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Yii isNewRecord is false in beforeSave?
提问by Yun
I made a beforeSave method in my model (extends GXActiveRecord), the if isNewRecord never gets triggered. My beforeSave() gets called, though.
我在我的模型中创建了一个 beforeSave 方法（扩展 GXActiveRecord）， if isNewRecord 永远不会被触发。不过，我的 beforeSave() 被调用了。
When I print the $this->isNewRecord variable, it's false. When is this variable set to false anyway? I'm very sure it's new
当我打印 $this->isNewRecord 变量时，它是错误的。这个变量什么时候设置为false？我很确定这是新的
public function beforeSave(){
if(parent::beforeSave())
{
if($this->isNewRecord){
$this->setAttribute('doc_status','new');
print "something";
}else{
$this->setAttribute('doc_status','updated');
}
return true;
} else { return false;
}
采纳答案by schmunk
CActiveRecord->isNewRecord is false if you've never saved it before.
如果您以前从未保存过 CActiveRecord->isNewRecord 则为 false。
E.g.
例如
$model = new Product;
$model->name = uniqid("bar");
echo "isNewRecord?".$model->isNewRecord; // 1 (true)
$model->save();
echo "isNewRecord?".$model->isNewRecord; // (false)
$model = Product::model();
$model->name = uniqid("foo");
echo "isNewRecord?".$model->isNewRecord; // (false)
$model->save();
echo "isNewRecord?".$model->isNewRecord; // (false)
回答by Amul
Well, this may be too late to answer, but I just wanted to get this out, cause this has caused enough confusion already (for me at least)...
好吧，现在回答可能为时已晚，但我只是想解决这个问题，因为这已经引起了足够的混乱（至少对我而言）......
If you call parent::beforeSave()in your model's beforeSave(), and test for isNewRecordafter this, it will always evaluate to false, because model is saved.
如果您调用parent::beforeSave()模型的 beforeSave() 并isNewRecord在此之后进行测试，它将始终评估为false，因为模型已保存。
You have your model built on top of a framework class, so when you override a method, do your task first then call on the parent method. So:
您的模型建立在框架类之上，因此当您覆盖一个方法时，首先执行您的任务，然后调用父方法。所以：
protected function beforeSave() {
if ($this->isNewRecord)
//do something
else
//do something else
/* some more code*/
parent::beforeSave();
return true;
}
You can also call parent beforeSave() like this:
您也可以像这样调用 parent beforeSave()：
return parent::beforeSave();
or
或者
return true && parent::beforeSave();
Hope this helps other who find this question through google.
希望这可以帮助其他通过谷歌找到这个问题的人。
回答by Gessle
At least in my case
至少在我的情况下
print($this->isNewRecord);
print(parent::beforeSave());
print($this->isNewRecord);
prints truein every line.
打印true在每一行。
And sorry I don't know how to reply to the answer above.
对不起，我不知道如何回复上面的答案。
