Question

在我的代码中，我想在产品表中的类别下显示类别和子类别。

此处是我的类别表

1。

 public function up() { Schema::create('categories', function (Blueprint $table) {

    $table->increments('id');
    $table->integer('parent_id'); 
    $table->string('name');  
    $table->rememberToken();
    $table->timestamps();

    });
}

此处是我的产品表

2。

public function up()
{
    Schema::create('products', function (Blueprint $table) {
        $table->increments('id');
        $table->integer('category_id');
        $table->string('product_name');
        $table->string('product_code');
        $table->timestamps();
    });
}

此处是我的类别模型

3.Category.php

<?php
namespace App;

use Illuminate\Database\Eloquent\Model;

class Category extends Model { protected $guarded=[];

public function products(){
    return $this->hasMany('App\Product');
}

此处是我的产品型号

4.Product.php

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Product extends Model
{
    public function category(){
        return $this->hasone('class::Category');
    }

}

现在这是我的 ProductsController.php

5.ProductsController.php

<?php

namespace App\Http\Controllers;

use App\Category;
use App\Product;
use Session;
use Illuminate\Http\Request;

class ProductsController extends Controller
{

     public function addproduct(Request $request){
         $product=New Product();
         $product->category_id=$request['category_id'];
         $product->product_name=$request['product_name'];
         $product->product_code=$request['product_code'];
         $product->status = request('status');
         $product->save();
         return back()->with('success','product Upload Successfully!');

         }
}

这是我的 addproduct.blade.php 文件

6.addproduct.blade.php

<form class="form-horizontal" method="post" action="{{route('add.product')}}" name="add_product" id="add_product" novalidate="novalidate">
                                @csrf

                                <div class="control-group">
                                    <label class="control-label">main Category </label>
                                    <div class="controls">
                                        <select name="category_id" id="category_id" style="width:220px;">

                                            <option value="0">Main Category</option>
                                            @foreach(App\Category::all() as $cat)
                                                <option value="{{$cat->id}}" >{{$cat->name}}</option>
                                            @endforeach

                                        </select>
                                    </div>
                                </div>


                                <div class="control-group">
                                    <label class="control-label">Product Name</label>
                                    <div class="controls">
                                        <input type="text" name="product_name" id="product_name">
                                    </div>
                                </div>

                                <div class="control-group">
                                    <label class="control-label">Product Code</label>
                                    <div class="controls">
                                        <input type="text" name="product_code" id="product_code">
                                    </div>
                                </div>

                                <div class="control-group">
                                    <label class="control-label">Product Color</label>
                                    <div class="controls">
                                        <input type="text" name="product_color" id="product_color">
                                    </div>
                                </div>


                                <div class="form-actions">
                                    <input type="submit" value="submit" class="btn btn-success">
                                </div>

                            </form>

7。我想要这样的数据

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Answer 1

在您的类别模型中

var values = [0,1,2,3,6,7,8,9,10,12,14,16,17]; //this can occur as X in 1 << X

function bitNumberToArray(bitNumber) {
  return values.filter(bit => bitNumber & 1 << bit );
}

console.log(bitNumberToArray(834));

刀片式服务器

class Category extends Model { protected $guarded=[];

    public function products(){
        return $this->hasMany('App\Product');
    }

    public function parent(){
        return $this->belongsTo('App\Category');
    }
}

Ps：对于您的开发：用于查看代码的刀片，您应该在刀片而不是模型中使用变量。因此，像这样@foreach(App\Category::all() as $cat) <option value="{{$cat->id}}" >{{ isset($cat->parent->name) ? $cat->parent->name . ' -- ' : '' }}{{$cat->name}}</option> @endforeach的板条箱变量将传递到Controller中的索引方法中以在刀片中使用。

如何在“类别”下拉列表中显示子类别

1 个答案: