I want to ovveride the default url() validation method in CakePHP, since it does not allow the use of ~ inside urls. I thought it would be enough to declare a url() method in AppModel, but it seems that core methods have the precedence with respect to user defined ones.
I think (but I have not tried) one possible way would be to use
$validate = array('url' => array(
'rule' => array('Userdefined', 'url'),
'message' => 'This is not an URL!!!'
));
or something like that (what is the correct sintax?). But this is not completely satisfying.
Indeed I pass the $validate variable as a JSON object to my javascript, and then I do client validation accordingly. Basically I have rewritten part of the CakePHP validation automagic in javascript. So I really want to have
$validate = array('url' => array(
'rule' => 'url',
'message' => 'This is not an URL!!!'
));
in order not to break client-side validation.
EDIT: It turns out I were wrong. The problem is that methods in Validation are called differently from methods in Model, so one has to pay attention when copying/pasting.
The first difference is that $check will now be an array instead of a string, but this I already figured out. What I did not realize is that another array of parameters is passed to Validation methods in Model. Since the signature of url() was
url($check, $strict = false)
the result was that $strict always had the value true, thereby requiring full URLs with protocol prefix. Seeing that the intended URL with tilde was not validating I assumed that the problem was that CakePHP still used the old method.
Why not just use the custom validation and make an url validation function with a different name?
Otherwise the manual says that you can override the Validation classes methods with functions in either the AppModel, Model, or Behaviors.
Here is the relevant link in the book.
http://book.cakephp.org/view/150/Custom-Validation-Rules#Adding-your-own-Validation-Methods-152
Related
Given this on the model:
public $validate = [
'amount' => array(
'rule' => array('comparison', '>=', 0),
'message' => 'You must buy over 0 of this item!'
)
];
How can I validate param #2 of the below?
public function buy(int $item, int $amount) {
Validation seems to be built only for POST, which I'd like to opt out of here.
First things first, modifying the database with GET requests is an anti-pattern for many different reasons. Even if you assume a friendly user agent (which you never should!), browsers can behave quirky and do unexpected stuff like for example sending GET request multiple times (that is perfectly valid as GET is not ment to modify data), which they usually won't for POST/PUT/DELETE.
I would strongly suggest to change your endpoint to handle POST requests instead.
That being said, you can generally validate whatever you want, the validation mechanisms first and foremost just validate data, they don't know or care where it stems from. You can hand over whatever data you want to your model, and let it validate it:
$data = array(
'item' => $item,
'amount' => $amount,
);
$this->ModelName->set($data);
if ($this->ModelName->validates()) {
// data is valid
} else {
// data is invalid
$errors = $this->ModelName->validationErrors;
}
Moreover you can use CakePHP's validation methods completely manually too:
App::uses('Utility', 'Validation');
$isValid = Validation::comparison($amount, '>' 0);
This example of course doesn't make too much sense, given that $isValid = $amount > 0 would do the same, however it should just show that you can validate anything everywhere without models being involved.
See also
Cookbook > Models > Data Validation > Validating Data from the Controller
Cookbook > Models > Data Validation > Core Validation Rules
Does Laravel validation provide any ways to fail when request contains input keys that are not defined in validation rules? Ex: Validator is instantiated with the following rules: ['name' => 'required', 'email' => 'required|email']. I want validation to fail if $request contains any other keys except name and email (Think of a user POSTing to the route end-point with undesirable data). Is that possible to achieve with simple validation rules?
P.S. I am aware of mass-assignment tricks with Eloquent, however I need to perform strict validation before any data is manipulated / persisted.
No, it's not possible to achieve with simple validation rules but would be easy to add.
All you would need to do is something like the following...
if ( count(request()->except(['name', 'email']) ) > 0) {
return false;
}
How can I create a model rule that's only required when a certain value from the Database is 1?
I tried using a 'required', 'when' rule but that doesn't seem to update the client-side JavaScript.
I also tried a custom inline validator but that doesn't seem to post an empty field.
Scenario's aren't an option I think as I have 6 fields and can have any combination of required/not required.
EDIT
At the moment I just never add the required rules, instead of directly returning the rules I store them in a variable. $rules = []
Then before I return the variable I add the required options to the array.
if($x->x_required)
$rules[] = ['your-field', 'required', 'on' => 'your-scenario'];
This is a quickfix and I don't really like it, but it works. I'm not sure if there is a better way of doing this.
You need to use combination required with when, but for client side validation you need additionally specify whenClient property.
Example (add this to your rules()):
[
'attributeName',
'required',
'when' => function ($model) {
return $model->country == Country::USA;
},
'whenClient' => function (attribute, value) {
return $('#country').value == 'USA';
},
],
Official docs:
RequiredValidator
Validator $when
Validator $whenClient
I have a generic Image model that is linked to by other models that need to have images attached. In most places the image is not required and we have fallbacks in case there is no image uploaded, but in a few particular cases I need to force the upload of an image for the form to validate, but I'm not sure how to validate that through another model. For instance, my model is something like this:
class Person extends AppModel
{
public $belongsTo = array(
'Image' => array(
'className' => 'Image',
'foreignKey' => 'image_id',
'type' => 'LEFT',
)
);
public $validate = array(
...
);
}
The Person model contains some text fields that folks have to enter as well as a redirect_url field. If a redirect is set the page logic will skip trying to load anything and will redirect directly to that URL. But, if it is not set then a bunch of other fields are required. I've got this working properly using a custom validation method in my Person model, but image_id field is not explicitly checked by the Person model since it is just a pointer to the Image model.
Can I somehow add a custom/dynamic validation rule to Image in this instance to have it check if Person.redirect_url is set? The only thing I can figure to do is to add this to my beforeSave() and basically manually check it using $this->data but I'd like to do this the "right" way if it's possible, hooking into the Validation class.
I tried a few variations on using something like this, with no luck thus far:
$this->Person->Image->validate['id']=array(...);
Edit:
Here is what I've tried doing, which kind of works:
public function beforeValidate($options=array()) {
parent::beforeValidate($options);
if(empty($this->data['redirect_url'])) {
if (!isset($this->data['Image']['filepath']) {
$this->invalidate('Image.filepath', 'Custom error message.');
return false;
}
}
}
This lets me invalidate the field without having to add extra code elsewhere, but when printing out the form field on the front end, I end up getting a generic "This file is required" error instead of my "Custom error message". I think this might be because file uploads are handled by a plugin that spirits them away to S3 instead of the local filesystem and it's getting overridden somewhere up the chain.
I am trying to do some very simple validation in my CakePHP contact form, but validation does not work eventhough I think I did everything necessary. Here's what I did:
I made a model like this:
class Office extends AppModel
{
var $name = 'Office';
var $useTable = false;
public $validate = array('onderwerp' => 'notEmpty');
}
(I also tried many other values for $validate from the CakePHP online manual)
In Config/bootstrap.php I made this rule for not letting CakePHP expect plural "Offices":
Inflector::rules('plural', array('rules' => array(),
'irregular' => array(),
'uninflected' => array('office')));
In OfficeController, I do this in my method contact():
$this->Office->set($this->request->data);
if($this->Office->validates()){
echo "code validates";
} else {
print_r($this->Office->validationErrors);
}
And in my Office/contact.ctp view, I have (amongst other code like starting and ending the form) this code:
$this->Form->input('onderwerp', array('label'=>false, 'size' => 60));
Now, even when I fill in the form, leaving empty the field 'onderwerp', it executes the code that should be executed when the code is executed.
When I print_r($this->request->data) or print_r($this->Office) I see that my onderwerp field is there and that it is empty (or filled when I do fill in something).
Now, when I add a public function validates() in my model and echo something there, it IS being displayed. So I'd say CakePHP knows where to find my model, and does execute my controller code. I also tried adding return parent::validates(); in my validates() function, but this also yielded no validation error, or any other error for that matter. My debug level is set to 2.
I guess I'm missing a needle in this haystack. Thanks for helping me finding it!
so drop all the inflector stuff.
and use the right model in your Form->create()
either
$this->Form->create(null)
or
$this->Form->create('Office');
and if you follow my advice to use a table less model with schema you will also have more power over input creation and validation.