BaseModel.php

<?php namespace Tmb;

use Illuminate\Database\Eloquent\Model as Eloquent;
use Illuminate\Validation\Validator;

class BaseModel extends Eloquent
{

  /**
	 * Error message bag
	 *
	 * @var Illuminate\Support\MessageBag
	 */
	protected $errors;

	/**
	 * Validation rules
	 *
	 * @var Array
	 */
	protected static $rules = array();

	/**
	 * Custom error messages
	 *
	 * @var array
	 */
	protected static $messages = array();

	/**
	 * Validator instance
	 *
	 * @var Illuminate\Validation\Validators
	 */
	protected $validator;

	public function __construct(array $attributes = array(), Validator $validator = null)
	{
		parent::__construct($attributes);

		$this->validator = $validator ?: \App::make('validator');
	}

	/**
	 * Listen for save event
	 */
	protected static function boot()
	{
		parent::boot();

		static::saving(function($model)
		{
			return $model->validate();
		});
	}

	/**
	 * Validates current attributes against rules
	 */
	public function validate()
	{
		$replace = ($this->getKey() > 0) ? $this->getKey() : '';
		foreach (static::$rules as $key => $rule)
		{
			static::$rules[$key] = str_replace(':id', $replace, $rule);
		}

		$validator = $this->validator->make($this->attributes, static::$rules, static::$messages);

		if ($validator->passes()) return true;

		$this->setErrors($validator->messages());

		return false;
	}

	/**
	 * Set error message bag
	 *
	 * @var Illuminate\Support\MessageBag
	 */
	protected function setErrors($errors)
	{
		$this->errors = $errors;
	}

	/**
	 * Retrieve error message bag
	 */
	public function getErrors()
	{
		return $this->errors;
	}

	/**
	 * Return if there are any errors
	 *
	 * @return bool
	 */
	public function hasErrors()
	{
		return ! empty($this->errors);
	}
}