如何在不更改 url 的情况下将变量从 blade 发送到控制器

Question

在 blade 我有一个书单。我想选择一本特定的书来显示它的信息。为此，我想通过路由将书的 id 与 href 一起发送到我的控制器。

例如我有

 <div class="body text-center">
 <a href="{{HERE!}}"><h6><b>{{($book->getName())}}</b></h6></a>
 </div>

在 href 中，我想添加 $bookId = $book->id 和路由名称，这样我就可以调用具有特定名称的路由，该路由调用控制器中的方法，该方法可以使用变量 $bookId

 Route::get('/infromation','Books\BookController@index')->name('info');

Answer 1

你可以这样试试

    <form action="/BookName/information/<?php echo $book->id; ?>" method="post">
      <div class="body text-center">
       <input type="hidden" name="book_id" value="{{ $book->id }}">
       <a href="/information/<?php echo $book->id; ?>">
          <button type="submit" name="book_information" class="btn btn-primary"> 
            <h6>
              <b>{{($book->getName())}}</b> 
            </h6>
         </button>
     </div>

   </form> 

    // make route like this
    Route::post('/BookName/information/{id}','Books\BookController@index');

    // Access the that id in controller
    public function index(Request $request)
    {
        echo $request->book_id;
    }

Answer 2

Here's two propositions:

The first one is to use spatie/laravel-sluggable to have the book name in the URL
The second one is to access the book without changing the URL with a POST request

Using spatie/laravel-sluggable

The slug will be generated automatically from name when the book is created.

your-migration.php

 Schema::create('books', function (Blueprint $table) {
    $table->bigIncrements('id');
    $table->string('slug')->unique()->index();
    $table->string('name');
    // ...
    $table->timestamps();
});

web.php

// Change the URIs as you want. `{book}` is mandatory to retrieve the book though.
Route::get('/books','Books\BookController@index')->name('book.index');
Route::get('/books/{book}','Books\BookController@show')->name('book.show');

Book.php

use Spatie\Sluggable\HasSlug;
use Spatie\Sluggable\SlugOptions;

class Book extends Model
{
    use HasSlug;

    protected $guarded = [];

    public function getSlugOptions()
    {
        // Adapt with what you want
        return SlugOptions::create()
            ->generateSlugsFrom('name')
            ->saveSlugsTo('slug')
            ->doNotGenerateSlugsOnUpdate();
    }

    public function getRouteKeyName()
    {
        return 'slug';
    }

}

BookController.php

class BookController extends Controller
{
    public function index()
    {
        return view('book.index');
    }

    public function show(Book $book)
    {
        // $book is retrieving using Model Binding: https://laravel.com/docs/5.8/routing#route-model-binding 
        return view('book.show', compact('book'));
    }
}

index.blade.php

<div class="body text-center">
    <a href="{{ route('book.show', $book) }}">
        <h6><b>{{ $book->getName() }}</b></h6>
    </a>
</div>

Using POST request (URI does not change) and without SLUG

I wouldn't recommend using this for the user experience.

The user cannot bookmark the book or share the link with someone else
When refreshing the page, it will prompt to the user if he want to re-submit the form request

web.php

Route::get('/books','Books\BookController@index')->name('book.index');
Route::post('/books','Books\BookController@show')->name('book.show');

BookController.php

class BookController extends Controller
{
    public function index()
    {
        return view('book.index');
    }

    public function show()
    {
        $book = Book::findOrFail(request('book_id'));
        return view('book.show', compact('book'));
    }
}

index.blade.php

<div class="body text-center">
    <form action="{{ route('book.show') }}" method="POST">
        @csrf
        <input type="hidden" value="{{ $book->id }}" name="book_id">
        <h6>
            <button type="submit"> 
                <b>{{ $book->getName() }}</b>
            </button>
        </h6>
    </form>
</div>

You can remove the default button style to make it looks like a link

如何在不更改 url 的情况下将变量从 blade 发送到控制器

How to send variable from blade to controller without changing the url

laravel

laravel-blade

laravel-6

laravel-controller

laravel-route