Laravel 5 HTTP/Requests-将url参数传递给rules()方法 [英] Laravel 5 HTTP/Requests - pass url parameter to the rules() method

问题描述

我正在尝试为slug字段在新的\HTTP\Requests\UpdateArticle类下创建一组规则，该规则需要应用unique过滤器，但仅当id不等于url参数时路由名称article/{article}的名称.

I'm trying to create a set of rules under the new \HTTP\Requests\UpdateArticle class for the slug field, which needs to have unique filter applied, but only when the id is not equal the url parameter of the route name article/{article}.

到目前为止，我得到的是:

What I got so far is:

public function rules()
{
    return [
        'title' => 'required|min:3',
        'excerpt' => 'required',
        'body' => 'required',
        'slug' => 'required|unique:articles,slug,?',
        'active' => 'required',
        'published_at' => 'required|date'
    ];

}

我需要用网址中的ID替换slug字段的唯一过滤器末尾的问号，但不知道如何获取它.

I need to replace the question mark at the end of the unique filter for slug field with the id from the url, but don't know how to obtain it.

推荐答案

您可以使用input()按名称检索路由参数:

You can retrieve route parameters by name with input():

$id = Route::input('id');
return [
    // ...
    'slug' => 'required|unique:articles,id,' . $id,
    // ...
];

文档中确实存在(向下滚动到访问路由参数值)

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