How to check if form field error exists?

Yii 1.1 General Discussion
1

Hello,

I want to add a CSS class to one of my form fields, if there are any errors related, but I couldn’t figure out how to do it.


<div class="control-group <?php if ($form->error($model,'username') != "") echo "error"; ?>">

I tried the above code but it didn’t work. What is the best way to do this?

Thanks.

2

Assuming you are using CActiveForm, that should work if there is an error present, are you certain there is?

3

Yes I’m using CActiveForm.

You can find the interesting part below:

<?php echo ‘"’ . $form->error($model,‘username’) . ‘"’; ?>

<?php echo strlen($form->error($model, ‘username’)); ?>

Outputs:

""81

Weird? Am I missing something here?

WAIT!

I looked at the page source and saw this bit:

<div class="errorMessage" id="LoginForm_username_em_" style="display:none"></div>

Now I know why it "renders" nothing but is of length 81.

But, how can I get only if an error exists or not?

4

Hey frbry,

I’m sorry I made a mistake the first time, CActiveForm::error($model, ‘attribute’); returns the error wrapped in html.

You need to query the actual model to do what you want to do:




<div class="control-group <?php if ($model->error('username') !== null) echo "error"; ?>">

Hope this helps you.

5

The right way to check for errors is to call the hasErrors() function.

http://www.yiiframew…asErrors-detail