rules/validation: model is validate if attribute1 or attribute2 or attribute3 is save

Yii 1.1 General Discussion
1

Hi,

I need to load data from the database to use them in an new/different kind (than before in my application).

In this case i load the model with ->findByPk()

The following code should only be executed if one of three attributes are not null/filled with an specific value.

First idea was to write some if-then-else construction.

Second idea was to use model validation and scenarios for that.

Is this an valid / smart use for Yii’s model validation?

If yes: how to use that? I didn’t get any ideas by reading that: http://www.yiiframework.com/wiki/56/reference-model-rules-validation

Thank you!

2

Can you give us an example of what you want please? pseudo code would do just fine if you need

3

Hi Asgaroth,

i need this for an news-website. Users can search into news. But before the application executes an search, we have to check, if there are enough serach-parameter available.

some pseudo-code as an example:




public function checkIfSearchIsUseful()

{$model = new myModel();  //myModel includes definitions for an search inside news-messages

if $model->PRIORITY has an value

 or $model->HEADLINE has an value

 or $model->SEARCHTERM hsa an value

->than return true //because you have minimum one information for what you can search

->else return false //the three main-attributes are empty - not enough information for an search.

}

Instead of the if construct maybe $model->validate is the better idea? (if it is possible)

4

Well other than else if cases I can only think of a custom validator combined with model scenarios:

http://www.yiiframework.com/wiki/168/create-your-own-validation-rule

That checks that at least one of your fields are required. if the form validates then do your search.

5

On an custom validator per default th system checks the validation of only on attribute (wich is passed trough by an parameter). That means, if i use something like that:


array('PRIORITY,HEADLINE,SEARCHTERM', 'checkUseful', 'check'=>array('PRIORITY','HEADLINE','SEARCHTERM')),

I thing, an simply if-than-else statement is the easiest with the smales overhead.