高级搜索laravel中的多对多关系

Question

我想为我的网站创建高级搜索。

我有有许多与书一对多的关系（我的主要模式）

类我怎么能在形式上通过分类搜索与选择

我的代码在控制器

public function advancedSearch(Request $request){ 
     $book = Book::query(); 
     if($request->get('name')){ 
      $name = $request->get('name'); 
      $book->where('name', 'like', '%'.$name.'%'); 
     } 

     if($request->get('author')){ 
      $author = $request->get('author'); 
      $book->where('author', 'like', '%'.$author.'%'); 
     } 
     if($request->get('category')){ 
      // MY QUESTION 
     } 
     $books = $book->get(); 
     $category = Category::lists('name','id'); 
     return view('search')->with('book',$books)->with('title','Search')->with('category',$category); 
    } 

和我的表单是

{!! Form::open(['method' => 'get' , 'url' => '/search/advanced']) !!} 
      <div class="form-group col-md-3"> 
       {!! Form::text('name',Input::old('name'),['class' => 'form-control input-sm col-md-3','placeholder'=>'Name']) !!} 
      </div> 
      <div class="form-group col-md-3"> 
       {!! Form::text('author',Input::old('author'),['class' => 'form-control input-sm col-md-3','placeholder'=>'Author']) !!} 
      </div> 
      <div class="form-group col-md-3"> 
       {!! Form::select('category[]',$category,'Select Category',['class' => 'form-control selectpicker input-sm col-md-3','placeholder'=>'Author','multiple']) !!} 
      </div> 
      <input class="btn btn-default" type="submit" name="btn" value="search"> 

{!! Form::close() !!} 

Answer 1

请尝试以下假设您的关系的名字是categories

if($request->get('category')){ 
    $book->whereHas('categories', function($query) use($request) { 
     $query->whereIn('id', $request->get('category'); 
    }); 
}