如何为表单请求创建唯一验证条件 (UPDATE/PATCH)

Question

我试图通过将 'validation request' 移动到名为 'BookRequest'.

的表单请求中来让我的控制器更干净

问题出在更新过程中，我尝试创建一个条件来检查，如果是 PATCH 或 POST，请使用以下代码

MyRequest.php

public function rules()
    {

        // Check Create or Update
        if ($this->method() == 'PATCH') 
        {
            $a_rules = 'required|string|size:6|unique:books,column2,' .$this->get('id');
            $b_rules = 'sometimes|string|size:10|unique:books,column3,' .$this->get('id');
        }

        else 
        {
            $a_rules = 'required|string|size:6|unique:books,column2';
            $b_rules = 'sometimes|string|size:10|unique:books,column3';
        }

        return [
            'column1'             => 'required|string|max:100',
            'column2'             => $a_rules,
            'column3'              => $b_rules,
            'column4'    => 'required|date',
            'column5'            => 'required|in:foo,bar',
            'column6'        => 'required',
            'column7'       => 'required',
            'column8'       => 'required',
        ];

    }

.$this->get('id') 失败，表格在更新时仍然处理唯一性。

控制器@更新

public function update($id, BookRequest $request)
{
    $book = Book::findOrFail($id);
    $input = $request->all();
    $book->update($request->all());
    return view('dashboards.book');
}

Controller@edit

public function edit($id)
{

    $book = Book::findOrFail($id);


    return view('dashboards.edit', compact('book'));
}

Controller@create

public function create()
{

    return view('dashboards.create');
}

Controller@store

public function store(BookRequest $request)
{


    $input = $request->all();
    $book = Book::create($input);

    return redirect('dashboards/book/index');
}

我尝试了替代方案 .$book->id，它抛出一个 ErrorException 未定义的变量：book

有什么建议吗？顺便说一下我用的是Laravel 5.2

Answer 1

您正在使用 book 作为您的路由参数，但尝试使用 id。试试这个-

if ($this->method() == 'PATCH') 
    {
        $a_rules = 'required|string|size:6|unique:books,column2,' .$this->route()->parameter('book');
        $b_rules = 'sometimes|string|size:10|unique:books,column3,' .$this->route()->parameter('book');
    }

希望对您有所帮助:)

如何为表单请求创建唯一验证条件 (UPDATE/PATCH)

How To Create Conditional for Unique Validation (UPDATE/PATCH) on Form Request

validation

unique

laravel

laravel-5.2

MyRequest.php

控制器@更新

Controller@edit

Controller@create

Controller@store