Laravel throw Error from Model if the Condition Fails

问题

I am doing all the validations in Model

My Rule is

public static $rules = array(
        'VehicleNumber' => 'required|unique:vehicle', 
        'NumberSeats' => 'required', 
        'VehicleType' => 'required', 
        'MaximumAllowed' => 'numeric|max:3',
        'VehicleCode' => 'required|unique:vehicle');
}

But for changing the file name and checking its size i am handling in a SetFooAttribute

public function setInsurancePhotoAttribute($InsurancePhoto)
{
    if($InsurancePhoto && Input::file('InsurancePhoto')->getSize() < '1000')
    {
    $this->attributes['InsurancePhoto'] = Input::get('VehicleCode') . '-InsurancePhoto.' . Input::file('InsurancePhoto')->getClientOriginalExtension();
    Input::file('InsurancePhoto')->move('assets/uploads/vehicle/', Input::get('VehicleCode') . '-InsurancePhoto.' . Input::file('InsurancePhoto')->getClientOriginalExtension());
    }
}

There in the Condition

if($InsurancePhoto && Input::file('InsurancePhoto')->getSize() < '1000')

If it fails the Storing of Image, Setting Attribute won't be done.

But How can i throw the Error to the User in this Case ?

回答1:

You can throw Exception with error message.

Model

if($InsurancePhoto && Input::file('InsurancePhoto')->getSize() < '1000') {
    // process image
} else {
    throw new \Exception('Error message');
}

In controller (where you call validation) you can catch this exception and print it to user.

回答2:

getSize() return integer so you should not use string for comparison as you have written 1000 in single quotes. You can create your own custom Validation in laravel. Check this links stackoverflow and http://culttt.com/2014/01/20/extending-laravel-4-validator/

来源：https://stackoverflow.com/questions/27645655/laravel-throw-error-from-model-if-the-condition-fails

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php

laravel

laravel-4