如何在用户表的帮助下显示库存数据答案

【问题标题】：how display the data of stock with the help of user table如何在用户表的帮助下显示库存数据
【发布时间】：2019-09-10 16:18:49
【问题描述】：

我将会话用户的用户 ID 与每一行数据一起存储在 Stock 表中。现在我尝试检索当时正在登录的特定用户的数据。只有哪些数据显示在表中的哪一行匹配 user_id 和 auth user_id。这是我的索引页

    @extends('layouts.app')

@section('content')

  @if($message = Session::get('success'))
  <div class="alert alert-success">
   <p>{{$message}}</p>
  </div>
  @endif
  <div class="row">
          <div class="col-md-12">
            <div class="card">
              <div class="card-header">
                <h4 class="card-title"> Stock
                <div align="right">
   <a href="{{route('stock.create')}}" class="btn btn-primary">Add</a>

  </div></h4>

              </div>
              <div class="card-body">
                <div class="table-responsive">
                  <table class="table">
                    <thead class=" text-primary">
    <th>Product Name</th>
    <th>Product code</th>
    <th>deatils</th>
    <th>Price</th>
    <th>Cost</th>
    <th>Quantity</th>
    <th></th>
    </thead>
    <tbody>

    @foreach($stocks as $row Auth::user()->user_id == user_if)
    <tr>
    <td>{{$row['product_name']}}</td>
    <td>{{$row['product_code']}}</td>
     <td>{{$row['details']}}</td>
      <td>{{$row['price']}}</td>
       <td>{{$row['cost']}}</td>
        <td>{{$row['quntity']}}</td>
    <td ><a  href="{{action('StockController@edit', $row['id'])}}" ><i class="fa fa-edit"></i></a>
    </td>
    <td>
     <form id="my_form"  method="post" class="delete_form" action="{{action('StockController@destroy', $row['id'])}}">
      {{csrf_field()}}
      <input type="hidden" name="_method" value="DELETE" />
      <a href="javascript:{}" onclick="document.getElementById('my_form').submit();"><i class="fa fa-trash"></i></a>
     </form>
    </td>
   </tr>
   @endforeach

                    </tbody>
                  </table>
                </div>
              </div>
            </div>
          </div>

</div>
</div>

@endsection

这是我的控制器文件，我尝试显示当时正在登录的特定用户的数据

    <?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Stock;
use Auth;
class StockController extends Controller
{
    /**
     * Display a listing of the resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function index()
    {
        $stocks = Stock::all()->toArray();
        return view('stock.index', compact('stocks'));
    }

    /**
     * Show the form for creating a new resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function create()
    {
        return view('stock.create');
    }

    /**
     * Store a newly created resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return \Illuminate\Http\Response
     */
    public function store(Request $request)
    {
        $this->validate($request, [
            'user_id' =>'required',
            'product_name'    =>  'required',
            'product_code'     =>  'required',
             'details'    =>  'required',
            'price'     =>  'required',
            'cost'    =>  'required',
            'quntity'     =>  'required'
        ]);
        $stock = new Stock([
            'user_id' =>  $request->get('user_id'),  
           'product_name'    =>  $request->get('product_name'),
            'product_code'    =>  $request->get('product_code'),
            'details'    =>  $request->get('details'),
            'price'    =>  $request->get('price'),
            'cost'    =>  $request->get('cost'),
            'quntity'     =>  $request->get('quntity')
]);
        $stock->save();
        return redirect()->route('stock.index')->with('success', 'Data Added');
    }

    /**
     * Display the specified resource.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function show($id)
    {
        //
    }

    /**
     * Show the form for editing the specified resource.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function edit($id)
    {
       $stock = Stock::find($id);
        return view('stock.edit', compact('stock', 'id'));
    }


    /**
     * Update the specified resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function update(Request $request, $id)
    {
         $this->validate($request, [
             'product_name'    =>  'required',
            'product_code'     =>  'required',
             'details'    =>  'required',
            'price'     =>  'required',
            'cost'    =>  'required',
            'quntity'     =>  'required'
        ]);
        $stock = Stock::find($id);
        $stock->product_name = $request->get('product_name');
        $stock->product_code = $request->get('product_code');
        $stock->details = $request->get('details');
        $stock->price = $request->get('price');
        $stock->cost = $request->get('cost');
        $stock->quntity = $request->get('quntity');
        $stock->save();
        return redirect()->route('stock.index')->with('success', 'Data Updated');
    }

    /**
     * Remove the specified resource from storage.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function destroy($id)
    {
         $stock = Stock::find($id);
        $stock->delete();
        return redirect()->route('stock.index')->with('success', 'Data Deleted');
    }
}

【问题讨论】：

@foreach($stocks as $row Auth::user()->user_id == user_if) user_if 中可能有错字
您需要在 User 和 Stock 之间建立关系。关注documentation。然后只需调用Auth::user()->stocks 而不是Stock::all()。然后，您可以使用常规的 foreach 循环进行迭代，而无需过滤掉用户。

标签： laravel

【解决方案1】：

有两种方法。首先就像@Keepon说的：在用户和库存表之间建立关系

2：

$user = Auth::user();
$stocks =  Stock::where('user_id','=',$user->id)->get();

【讨论】：

【解决方案2】：

请更改您的索引功能

 /**
 * Display a listing of the resource.
 *
 * @return \Illuminate\Http\Response
 */
public function index()
{

    $stocks = Stock::where('user_id', Auth::id())->get();
    return view('stock.index', compact('stocks'));
}

比在你的刀片中

 @foreach($stocks as $stock)
<tr>
<td>{{$stock->product_name}}</td>
<td>{{$stock->product_code}}</td>
 <td>{{$stock->details}}</td>
  <td>{{$stock->price}}</td>
   <td>{{$stock->cost}}</td>
    <td>{{$stock->quntity}}</td>
<td ><a  href="{{action('StockController@edit', $stock->id)}}" ><i class="fa fa-edit"></i></a>
</td>
<td>
 <form id="my_form"  method="post" class="delete_form" action="{{action('StockController@destroy', $stock->id)}}">
  {{csrf_field()}}
  <input type="hidden" name="_method" value="DELETE" />
  <a href="javascript:{}" onclick="document.getElementById('my_form').submit();"><i class="fa fa-trash"></i></a>
 </form>
</td>
</tr>
 @endforeach

【讨论】：

【解决方案3】：

最好的做法是创建一个MODEL RELATIONSHIP。

要建立用户和股票关系，您需要确定要建立什么样的关系。

在这种情况下，我将根据我理解的一对多关系建立关系

数据库

股票迁移

Schema::create('users', function (Blueprint $table) {
  $table->bigIncrements('id');
  $table->unsignedBigInteger('user_id');
  ...
  $table->timestamps();

  $table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');
});

它应该看起来像上面的代码。然后在您的模型中，您可以连接 user 和 stocks

的关系

型号

用户模型

class User extends Authenticatable
{
    use Notifiable;

    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [
        'name', 'email', 'password',
    ];

    /**
     * The attributes that should be hidden for arrays.
     *
     * @var array
     */
    protected $hidden = [
        'password', 'remember_token',
    ];

    /**
     * The attributes that should be cast to native types.
     *
     * @var array
     */
    protected $casts = [
        'email_verified_at' => 'datetime',
    ];

    public function stocks() {
      return $this->hasMany(Stock::class);
    }
}

库存模型

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

    public function user() {
        return $this->belongsTo(User::class);
    }
}

然后您可以在控制器上查询用户股票。

控制器

库存控制人

public function index() {
  $stocks = auth()->user()->stocks;

  return view('index', compact('stocks'));
}

如果您想要更多雄辩的关系示例，您可以查看 Victor 的 tutorial

【讨论】：

【解决方案4】：

在用户模型中添加此功能

public function stocks() {
  return $this->hasMany(Stock::class);
}

在库存控制器中

public function index()
{
    $stocks = auth()->user()->stocks;
    return view('stock.index', compact('stocks'));
}

在 index.blade.php 中

@foreach($stocks as $row)
<tr>
<td>{{$row['product_name']}}</td>
<td>{{$row['product_code']}}</td>
 <td>{{$row['details']}}</td>
  <td>{{$row['price']}}</td>
   <td>{{$row['cost']}}</td>
    <td>{{$row['quntity']}}</td>
<td ><a  href="{{action('StockController@edit', $row['id'])}}" ><i class="fa fa-edit"></i></a>
</td>
<td>
 <form id="my_form"  method="post" class="delete_form" action="{{action('StockController@destroy', $row['id'])}}">
  {{csrf_field()}}
  <input type="hidden" name="_method" value="DELETE" />
  <a href="javascript:{}" onclick="document.getElementById('my_form').submit();"><i class="fa fa-trash"></i></a>
 </form>
</td>

@endforeach

【讨论】：