Validate another field if file field is not empty - php

Question

I'm trying to validate a field if a file fields is not empty. So if someone is trying to upload a file, I need to validate another field to make sure they selected what they are uploading, however I don't know how to check to see, or run a rule only if the field is not empty.
public function rules()
{
// NOTE: you should only define rules for those attributes that
// will receive user inputs.
return array(
array('full_name, gender_id','required'),
array('video', 'file', 'types'=>'mp4', 'allowEmpty' => true),
array('audio', 'file', 'types'=>'mp3', 'allowEmpty' => true),
array('video','validateVideoType'),
);
}
public function validateVideoType() {
print_r($this->video);
Yii::app()->end();
}
So this->video is always empty whether I just uploaded something or not. How do I check to see if that variable is set?

Answer 1

Custom validation function must be defined properly. It has two parameters always $attribute & $params.
public function validateVideoType($attribute, $params) {
print_r($this->video);
Yii::app()->end();
}
Now in this you should write your custom way to validate.
I am sure that would work fine.

Answer 2

You can check it with jQuery/javascript, where 'new_document' is the name of the input file field.
if ($("#new_document").val() != "" || $("#new_document").val().length != 0) {
//File was chosen, validate requirements
//Get the extension
var ext = $("#new_document").val().split('.').pop().toLowerCase();
var errortxt = '';
if ($.inArray(ext, ['doc','docx','txt','rtf','pdf']) == -1) {
errortxt = 'Invalid File Type';
//Show error
$("#document_errors").css('display','block');
$("#document_errors").html(errortxt);
return false;
}
//Check to see if the size is too big
var iSize = ($("#new_document")[0].files[0].size / 1024);
if (iSize / 1024 > 5) {
errortxt = 'Document size too big. Max 5MB.';
//Show error
$("#document_errors").css('display','block');
$("#document_errors").html(errortxt);
return false
}
} else {
//No photo chosen
//Show error
$("#document_errors").css('display','block');
$("#document_errors").html("Please choose a document.");
return false;
}
This code is obviously not perfect for your needs but may have the requirements to piece together what you need.