Why Use Parent:: ?

Yii 1.1 General Discussion
1

Hi,

In a lot of examples I see things like:




parent::afterValidate();


//or

return parent::beforeSave();

In methods like:




	protected function beforeSave()

	{		

		if(!$this->hasErrors())

		{

                    // Do something.

		}

		return parent::beforeSave();

	}

I can’t figure out why you have to call parent::afterValidate(); when you already in afterValidate()?

Could someone help me out?

2

They may have other pieces of code that need processing in the parent class. For beforeSave(), I believe that it will not allow you to save the record/s if it does not return true.

3

Tnx hs2323.

I think I found more info in the 3th point of the answer of this question:

So is it correct that when I use an extended method of (for this example) the CActiveRecord class, that I always have to call the parent method first?

4

Usually yes, unless you want to completely block the parent’s default processing of the method, for example if you’re substituting your own code for it.

5

If you do block out the parent method, make sure to also return a value (usually true/false) if the parent function does.

6

I would suggest you always call the parent in some cases Yii uses these events/callbacks internally

7

Tnx a lot people. I will use return parent::[i]name/i from now on.