CakePHP empty field versus not empty field validations - php

Question

I have the follow validation rule for a file:
modelFile.php
public $validate = array(
'image' => array(
'maxWidth' => array(
'rule' => array('maxWidth', 2000),
),
'maxHeight' => array(
'rule' => array('maxHeight', 2000),
),
'extension' => array(
'rule' => array('extension', array('gif', 'jpg', 'png', 'jpeg')),
),
'filesize' => array(
'rule' => array('filesize', 5120000),
)
)
);
Have a way to skip validations, if image are empty?

Answer 1

You may have to adjust how you check if the image is empty/not uploaded - I'm not sure if what I have is correct. But the idea is to check and unset the validation rule.
public function beforeValidate($options = array()) {
if (empty($this->data[$this->alias]['image']['name'])) {
unset($this->validate['image']);
}
return true;
}

Answer 2

See below URL
cakePHP optional validation for file upload
Or try it
"I assign $this->data['Catalog']['image'] = $this->data['Catalog']['imageupload']['name'];"
So by the time you save your data array, it looks something like this I assume:
array(
'image' => 'foobar',
'imageupload' => array(
'name' => 'foobar',
'size' => 1234567,
'error' => 0,
...
)
)
Which means, the imageupload validation rule is trying to work on this data:
array(
'name' => 'foobar',
'size' => 1234567,
'error' => 0,
...
)
I.e. the value it's trying to validate is an array of stuff, not just a string. And that is unlikely to pass the specified validation rule. It's also probably never "empty".
Either you create a custom validation rule that can handle this array, or you need to do some more processing in the controller before you try to validate it

Answer 3

Ok, as far as I know there is no such code to set this in your $validate variable. So what you are going to have to do is:
In the beforeValidate of the corresponding model add the following piece of code:
<?php
# Check if the image is set. If not, unbind the validation rule
# Please note the answer of Abid Hussain below. He says the ['image'] will probably
# never be empty. So perhaps you should make use of a different way to check the variable
if (empty($this->data[$this->alias]['image'])){
unset($this->validate['image']);
}
I used http://bakery.cakephp.org/articles/kiger/2008/12/29/simple-way-to-unbind-validation-set-remaining-rules-to-required as my main article. But this function doesn't seem to be a default cake variable. The code above should work.