[转]Laravel 4之验证

Laravel 4之验证

http://dingjiannan.com/2013/laravel-validation/

基本验证

使用Validator::make($data, $rules)验证，第一个参数为需验证的数据，第二个参数为每个字段的验证规则

1. Route::post('/registration',function()
2. {
3. $data =Input::all();
4. // Build the validation constraint set.
5. $rules = array(
6. 'username'=>'alpha_num'
7. );
8. // Create a new validator instance.
9. $validator =Validator::make($data, $rules);
10. });

如需多个验证规则，使用|隔开

1. $rules = array('username'=>'alpha_num|min:3');

或是使用数组

1. $rules = array('username'=> array('alpha_num','min:3'));

创建完一个验证，使用$validator->passes()或$validator->fails()执行验证，判断验证是否通过

1. if($validator->passes()){
2. // Normally we would do something with the data.
3. return'Data was saved.';
4. }

具体验证规则参考官方API

错误消息

获取错误消息列表

1. $errors = $validator->messages();

获取一个域的第一个消息

1. $errors->first('email');

获取一个域的全部消息

1. foreach($errors->get('email')as $message)
2. {
3. //
4. }

获取全部域的全部错误消息

1. foreach($errors->all()as $message)
2. {
3. //
4. }

检查一个域是否存在消息

1. $errors->has('email')

向视图反馈消息

1. returnRedirect::to('/')->withErrors($validator);

在视图中使用

1. <ulclass="errors">
2. @foreach($errors->all() as $message)
3. <li></li>
4. @endforeach
5. </ul>

以某种格式获取消息

1. @foreach($errors->all('<li>:message</li>')as $message)
3. @endforeach

或是

1. $errors->first('username',':message'，<span class="error">:message</span>)

自定义验证规则

1. Validator::extend('awesome',function($field, $value, $params)
2. {
3. return $value =='awesome';
4. });

定制的验证器接受三个参数：待验证属性的名字、待验证属性的值以及传递给这个规则的参数。传递一个类的函数到 extend 函数，而不是使用闭包：

1. Validator::extend('awesome','CustomValidation@awesome');

自定义错误消息

传递定制消息到验证器

1. // Build the custom messages array.
2. $messages = array(
3. 'min'=>'Yo dawg, this field aint long enough.'
4. );
5. // Create a new validator instance.
6. $validator =Validator::make($data, $rules, $messages);

验证占位符

1. $messages = array(
2. 'same'=>'The :attribute and :other must match.',
3. 'size'=>'The :attribute must be exactly :size.',
4. 'between'=>'The :attribute must be between :min - :max.',
5. 'in'=>'The :attribute must be one of the following types: :values',
6. );

对一个指定的域指定定制的错误消息

1. $messages = array(
2. 'email.required'=>'We need to know your e-mail address!',
3. );

结束

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