> Phalcon7中文手册 > 模型验证(Validating Models)

模型验证(Validating Models)¶

验证模型数据完整性(Validating Data Integrity)¶

在模型 Phalcon\Mvc\Model 中提供了几个事件(beforeSavebeforeCreatebeforeUpdate)用以数据的验证和过滤。 我们推荐使用专用的事件 validation,它允许我们调用内置的验证类进行验证数据:

<?PHP

use Phalcon\Mvc\Model;
use Phalcon\Validation\Validator\uniqueness;
use Phalcon\Validation\Validator\InclusionIn;

class Robots extends Model
{
    public function validation()
    {
        $validation = new Phalcon\Validation;

            $validation->add("type", new InclusionIn(
            array(
                "DOMain" => array("Mechanical", "Virtual")
            )
        );

            $validation->add("name", new Uniqueness(
            array(
                "message" => "The robot name must be unique"
            )
        );

        return $this->validate($validation);
    }
}

上面的例子使用了内置验证器`InclusionIn` 和 Uniqueness,更多的内置验证器请查看 验证 章节。

除了内置的验证程序,我们可以创建自定义验证器:

<?php

use Phalcon\Validation\Validator;
use Phalcon\Validation\ValidatorInterface;
use Phalcon\ValidationInterface;

class MaxMinValidator extends Validator implements ValidatorInterface
{
    public function validate(ValidationInterface $validator, $field, $allowEmpty = FALSE)
    {
        $min   = $this->getOption('min');
        $max   = $this->getOption('max');

        $value = $validator->getValue($field);

        if ($min <= $value && $value <= $max) {
            $message = new Phalcon\Validation\Message("The field doesn't have the right range of values", $field, "MaxMinValidator", 0);
            $validator->appendMessage($message);
            return false;
        }

        return true;
    }
}

Adding the validator to a model:

<?php

use Phalcon\Mvc\Model;

class Customers extends Model
{
    public function validation()
    {
        $validation = new Phalcon\Validation;

            $validation->add("price", new MaxMinValidator(
            array(
                "min"   => 10,
                "max"   => 100
            )
        );

        return $this->validate($validation);
    }
}

The idea of creating validators is make them reusable between several models. A validator can also be as simple as:

<?php

use Phalcon\Mvc\Model;
use Phalcon\Validation\Message;

class Robots extends Model
{
    public function validation()
    {
        if ($this->type == "Old") {
            $message = new Message(
                "Sorry, old robots are not allowed anymore",
                "type",
                "MyType"
            );

            $this->appendMessage($message);

            return false;
        }

        return true;
    }
}

可以通过覆盖 Phalcon\Mvc\Model::getMessages() 方法对默认验证信息就行转换:

<?php

use Phalcon\Mvc\Model;

class Robots extends Model
{
    public function getMessages()
    {
        $messages = array();
        foreach (parent::getMessages() as $message) {
            switch ($message->getType()) {
                case 'InvalidCreateAttempt':
                    $messages[] = 'The record cannot be created because it already exists';
                    break;
                case 'InvalidUpdateAttempt':
                    $messages[] = 'The record cannot be updated because it doesn\'t exist';
                    break;
                case 'PresenceOf':
                    $messages[] = 'The field ' . $message->getField() . ' is mandatory';
                    break;
            }
        }

        return $messages;
    }
}

验证失败事件(Validation Failed Events)¶

Another type of events are available when the data validation process finds any inconsistency:

Operation Name Explanation
Insert or Update notSaved Triggered when the INSERT or UPDATE operation fails for any reason
Insert, Delete or Update onValidationFails Triggered when any data manipulation operation fails