Laravel 扩展验证自定义消息
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Laravel Extended Validation custom message
提问by Ajeesh Joshy
I wanted to create this extended validation.
我想创建这个扩展验证。
Validator::extend('my_custom_validation_rule', function ($attribute, $value, $parameters) {
// I guess I should be setting the error message for this here.(Its dynamic)
// We can return true or false here depending upon our need.
}
I would use this rule like this
我会像这样使用这个规则
'my_field' => 'required|my_custom_validation_rule',
'my_field' => 'required|my_custom_validation_rule',
I want to use some dynamic message for the error of "my_custom_validation_rule"
我想对“ my_custom_validation_rule”的错误使用一些动态消息
I was unable to find something from the documentation about it. Is there anyway to do it ?
我无法从文档中找到有关它的内容。反正有办法吗？
回答by lukasgeiter
The extendmethod allows to pass the message as a third argument:
该extend方法允许将消息作为第三个参数传递：
Validator::extend('my_custom_validation_rule', function ($attribute, $value, $parameters) {
// ...
}, 'my custom validation rule message');
By default you can only use dynamic variable, which is :attribute. If you want to add more use Validator::replacer():
默认情况下，您只能使用动态变量，即:attribute. 如果您想添加更多使用Validator::replacer()：
Validator::replacer('my_custom_validation_rule', function($message, $attribute, $rule, $parameters){
return str_replace(':foo', $parameters[0], $message);
});
回答by ?lter Ka?an ?cal
You can also define the message for your custom validation rule under validation translations file.
您还可以在验证翻译文件下为您的自定义验证规则定义消息。
/resources/lang/en/validation.php
/resources/lang/en/validation.php
....
'unique' => 'The :attribute has already been taken.',
'uploaded' => 'The :attribute failed to upload.',
'url' => 'The :attribute format is invalid.',
//place your translation here
'my_custom_validation_rule' => 'The :attribute value fails custom validation.'
回答by rmdwirizki
This is basically the same way as @lukasgeiter answer, but in case you need to manage dynamic variable inside the extend function, you can use $validator->addReplacerinside the extend directly.
这与@lukasgeiter 的回答基本相同，但如果您需要在扩展函数内部管理动态变量，则可以$validator->addReplacer直接在扩展内部使用。
Validator::extend('my_custom_validation_rule', function ($attribute, $value, $parameters, $validator) {
// Test custom message
$customMessage = request()->get('foo')
? "Foo doesn't exist"
: "Foo exist";
// Replace dynamic variable :custom_message with $customMessage
$validator->addReplacer('my_custom_validation_rule',
function($message, $attribute, $rule, $parameters) use ($customMessage) {
return \str_replace(':custom_message', $customMessage, $message);
}
);
// Test error message. (Make it always fail the validator)
return false;
}, 'My custom validation rule message. :custom_message');
回答by fico7489
possible (not very elegant) workaround is :
可能（不是很优雅）的解决方法是：
$message = 'my custom validation rule message' . request()->get('param');
Validator::extend('my_custom_validation_rule', function ($attribute, $value, $parameters) {
//
}, $message);
