如何使用Laravel 5.4中的BelongsToMany關係過濾搜索？

Question

我創建了一個過濾器，通過JavaScript從我的搜索中返回數據，此過濾器具有模型，描述，狀態，分發者等。我需要在搜索中創建搜索字段以返回與產品相關的類別，但是當我運行我的代碼，它什麼都沒有返回。

ProdutosController：

public function search(Request $request) 
    { 
     $product = Produtos::query(); 
     $categoria = Categoria::query(); 

//  $model = $request->model; 
//  $status = $request->status; 
//  $distributor = $request->distributor; 

     if ($request->isMethod('post')) 
     { 
      $data = json_decode($request->search_data); 
      $descricao; 
      $model; 
      $status; 
      $distributor; 
      $stock; 
      $image; 
      $categoria; 

      $descricao = $data->descricao; 
      $model = $data->model; 
      $status = $data->status; 
      $distributor = $data->distributor; 
      $stock = $data->stock; 
      $image = $data->image; 
      $categoria = $data->categoria; 

      session(['descricao' => $descricao]); 
      session(['model' => $model]); 
      session(['status' => $status]); 
      session(['distributor' => $distributor]); 
      session(['stock' => $stock]); 
      session(['image' => $image]); 
      session(['categoria' => $categoria]); 
     } 
     if (strlen(session('descricao')) > 0) 
     { 
      $product_ids = ProdutosDescricao::where('erp_name', 'LIKE', '%' . session('descricao') . '%')->get(); 
      $ids = []; 

      foreach ($product_ids as $product_data) 
      { 
       $ids[] = $product_data->erp_productid; 
      } 

      $product = $product->whereIn('erp_productid', $ids); 
     } 


     if (strlen(session('model')) > 0) 
     { 
      $product = $product->where('erp_model', 'LIKE', '%' . session('model') . '%'); 
     } 

     if (strlen(session('status')) > 0) 
     { 
      $product = $product->where('erp_status', session('status')); 
     } 


     if (strlen(session('distributor')) > 0) 
     { 
      $product = $product->where('erp_distributor', session('distributor')); 
     } 
     if (strlen(session('stock')) > 0) 
     { 
      if (intval(session('stock')) == 1) 
      { 
       $product = $product->where('erp_quantity', '>', 0); 
      } else 
      { 
       $product = $product->where('erp_quantity', '=', 0); 
      } 
     } 

     if (strlen(session('image')) > 0) 
     { 
      $URL_IMAGE = "http://comercio-urbano.s3-website-sa-east-1.amazonaws.com/produtos/marcas/nao_disponivel.jpg"; 

      if (intval(session('image')) == 0) 
      { 
       $product_ids = ProdutoImage::where('erp_image', '=', $URL_IMAGE)->get(); 
       $ids = []; 

       foreach ($product_ids as $product_data) 
       { 
        $ids[] = $product_data->erp_productid; 
       } 

       $product = $product->whereIn('erp_productid', $ids); 
      } 
     } 

     if (strlen(session('categoria')) > 0) 
     { 
      $categoria = $categoria->where('erp_category', session('categoria')); 
     } 

     $content = $product->paginate(30); 

     if ($request->isMethod('post')) 
     { 
      return view('products.product-table')->with('produtos', $content)->with('categoria', $categoria); 
     } else 
     { 
      return view('products.index')->with('produtos', $content)->with('categoria', $categoria); 
     } 
    } 

ProductSearch.js

$(document).ready(function() { 

    $(document).on('blur', '#model', function() { 
     var model = $('#model').val(); 
     searchRequest['model'] = model; 
     doSearch(); 
    }); 

    $(document).on('blur', '#descricao', function() { 
     var descricao = $('#descricao').val(); 
     searchRequest['descricao'] = descricao; 
     doSearch(); 
    }); 

    $(document).on('blur', '#status', function() { 
     var status = $('#status').val(); 
     searchRequest['status'] = status; 
     doSearch(); 
    }); 

    $(document).on('blur', '#distributor', function() { 
     var distributor = $('#distributor').val(); 
     searchRequest['distributor'] = distributor; 
     doSearch(); 
    }); 

    $(document).on('blur', '#stock', function() { 
     var stock = $('#stock').val(); 
     searchRequest['stock'] = stock; 
     doSearch(); 
    }); 

    $(document).on('blur', '#image', function() { 
     var image = $('#image').val(); 
     searchRequest['image'] = image; 
     doSearch(); 
    }); 

    $(document).on('blur', '#categoria', function(){ 
     var categoria = $('#categoria').val(); 
     searchRequest['categoria'] = categoria; 
     doSearch(); 
    }); 

}); 

$(document).on('click', '#clean-form-button', function() { 
    $('#descricao').val(""); 
    $('#model').val(""); 
    $('#distributor').val(""); 
    $('#status').val(""); 
    $('#stock').val(""); 
    $('#categoria').val(""); 
    searchRequest = { 
     'descricao': '', 
     'model': '', 
     'distributor': '', 
     'status': '', 
     'stock': '', 
     'image': '', 
     'categoria':'', 
    }; 
    doSearch(); 
}); 

function IsEmpty(str) 
{ 
    if (typeof str == 'undefined' || !str || str.length === 0 || str === "" || !/[^\s]/.test(str) || /^\s*$/.test(str) || str.replace(/\s/g, "") === "") 
    { 
     return true; 
    } 
    else 
    { 
     return false; 
    } 
} 

function doSearch() { 
    $.post(postSearch, { 
     'search_data': JSON.stringify(searchRequest), 
     '_token': $('meta[name=csrf-token]').attr('content'), 
    } 
    , function(data) { 
     $('#product-table').html(data); 
    }); 
} 


$("#model").html('<img src="https://mir-s3-cdn-cf.behance.net/project_modules/disp/1f430a36197347.57135ca19bbf5.gif" alt="Wait" />'); 
$('#message').load('index.php?pg=ProductSearch', null, function() { 
    $("#model").html(''); 
}); 
$body = $("body"); 

$(document).on({ 
    ajaxStart: function() { $body.addClass("loading"); }, 
    ajaxStop: function() { $body.removeClass("loading"); } 
}); 

Products.index

<select class="selectpicker" data-live-search="true" id="erp_categoryid" name="erp_categoryid"> 
      @foreach($categorias as $categoria) 
     <option data-tokens="{{$categoria->erp_name}}" value="{{$categoria->erp_categoryid}}" @if(session('categoria') == "{{$categoria->erp_categoryid}}") selected @endif>{{$categoria->erp_name}}</option> 
      @endforeach 
     </select> 

產品table.blade.php

<td>@foreach($produto->categoria as $categoria) 
     {{$categoria->erp_name}} 
     @endforeach 
    </td> 

型號

public function categoria() 
     { 
      return $this->belongsToMany('App\Models\Categoria', 'erp_product_category', 'erp_productid', 'erp_categoryid'); 
     } 

什麼建議嗎？

Answer 1

因爲你是從Javascript調用它，你需要從你的控制器返回JSON。

if ($request->isMethod('post')) { 
    return response()->json(compact('content', 'categoria'); 
} else { 
    return view('products.index')->with('produtos', $content)->with('categoria', $categoria); 
} 

如果它返回一些結果，你可以檢查你的控制檯。從這個迴應中，你可以建立你的html。