Hello, I'm new to October. I tried many things with Builder plugin to manage validations in back-end during 'create' or 'update' forms. I would like, depending on a field value to STOP the create or update process and UPDATE the field with a default value WITHOUT submission.

It's not clear for me where I have to put this code ? I understood that it was in the Model .php but I can't figure on which event I should code this validation... ... and how to STAY on the form with an ERROR MESSAGE, until the field is good. Thanks to put me on the way !

Did you read this?

https://octobercms.com/docs/api/model/beforevalidate

In your model, you can add this:

public function beforeValidate()
{   
    if ($this->field == 'VALUE') {
        $this->field = 'DEFAULT_VALUE';
        throw new \October\Rain\Exception\ValidationException(['field' => 'Invalid Value']);
    }   
}

Actually, you won't be able to update the field's value with this.

Thanks for your answers. I was trying this since a long time. Now I found that beforeValidate() is only called during CREATE. For updating an existing record, I tried beforeUpdate() but it doesn't go inside. What's wrong ?

public function beforeUpdate() { \Flash::error('beforeUpdate()'); // doesn't display with SAVE }

Sorry : Markdown not working ;-(

Last updated 5 years ago

beforeValidate() is called for both creating/updating a record.

Flash won't work here to prevent saving the record, use throw() as below:

throw new \October\Rain\Exception\ValidationException(['field' => 'Invalid value']);

Replace "field" with your field name

Also, don't forget to add this in your model class definition:

class MyClass extends Model
{
   use \October\Rain\Database\Traits\Validation;
   ...

Thanks it works !

Sorry, but as the documentation is quite light, should I understand that this instruction invalidates the form submission, creating a validation error on the specified field and stopping the code ?

And what is the best way to display debug messages without perturbations ?

Last updated 5 years ago

Incremental said:

Thanks it works !

Sorry, but as the documentation is quite light, should I understand that this instruction invalidates the form submission, creating a validation error on the specified field and stopping the code ?

Yes, that is correct.

And what is the best way to display debug messages without perturbations ?

Not sure what you mean.

OK so, ValidationException is the last executed of beforeValidate()

I was wondering how to display debug messages, as echo() can't be used and Flash seems not working everywhere...?

I tried throw new \SystemException('beforeValidate()='.$var);

but I get a popup displaying the message AND : on line 121 of C:\Dev\WinNMP\WWW\site\plugins\lb\events\models\Event.php

As only the last message is displayed with Flash, I would like some popup with a OK button to continue the code step by step... Is it possible ???

Thanks for your kind help

Last updated 5 years ago

As only the last message is displayed with Flash, I would like some popup with a OK button to continue the code step by step... Is it possible ???

I don't know how to do that.

and how do you put your traces, as throw stops everything ?

I experienced this popup without an indication of the code line :

throw new \ApplicationException('beforeValidate() : '.$called); // Popup with OK & STOP

but it stops the code...

By the way, you helped me a lot to understand the validation with beforeValidate()

But is there a way to correct a field with a default value ???

Your instruction :

$this->field = 'DEFAULT_VALUE';

has no effect.

I'm searching a way to do this since months. Is it impossible in October ???