CakePHP自定义验证与错误消息中的一个变量 [英] CakePHP custom validation with a variable in the error message

问题描述

下午好。

我有一个Model有一个名为percentage的字段。所有类似模型的百分比不能超过100％。检查是否在验证期间处理。

I have a Model that has a field called "percentage". All similar Models cannot have their percentages add up to more than 100%. Checking for this is handled during validation.

我需要验证错误消息来说明用户剩余多少百分比房间。例如，如果所有MyModels已经有80％，并且用户尝试创建一个百分比为40％的新MyModel，错误消息会说：你的百分比太高，你只剩下20％。

I need the validation error message to say how much percentage "room" the user has left. For example, if all MyModels already have a total of 80% and the user tries to create a new MyModel with a percentage of 40%, the error message would say, "Your percentage is too high. You only have 20% remaining."

问题是我不知道如何在验证错误消息中放置变量。

The problem is that I don't know how to put a variable in a validation error message.

在MyModel.php中：

In MyModel.php:

public $validate = array(
    'percentage' => array(
        'rule' => array('confirmValidPercentage', 'percentage'),
        'message' => 'foo',
        'required' => true,
    ),
);

public function confirmValidPercentage($data) {
    $percentage = floatval($data['percentage']);

    $total = 0.00;
    $weights = $this->find('all', array('recursive'=>-1));
    foreach ($weights as $weight) {
        $total += floatval($weight[$this->name]['percentage']);
    }

    if ($total + $percentage > 100) {
        // handle the error variable here
        return false;
    }
    else {
        return true;
    }
}

我试过：

$this->validate['percentage']['message'] = 'You have '.(100-$total).'% remaining';

但此处设置的消息元素不覆盖原始消息 - 错误消息仍为'foo'。我试图从$ validation数组一起删除消息元素，但它默认为父名称，即percent。我试过：

but the message element set here does not override the original message - the error message remains 'foo'. I tried removing the message element form the $validation array altogether, but it defaults to the parent name, i.e. 'percentage'. I tried:

unset($this->validate['percentage']['message']);

，然后设置验证消息，但结果相同。

before setting the validate message but the result is the same.

有人知道如何在验证错误消息中返回一个变量吗？非常感谢。

Does anyone know how to return a variable in a validation error message? Thanks a lot.

推荐答案

这很容易。只是返回错误字符串！

thats actually pretty easy. just return the error string!

return 'You have ' . ...;

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