尝试在 Laravel 中使用 belongsTo 但它不起作用

Question

我使用 Laravel 6.2

我想做一个库存数据库系统。我有 2 个模态 Produk 和 Stock。在那种情况下，我想从 ProdukTable 输入数据 p_name 和 sku 并使用 Eloquent ORM[=41 将其放入 StockTable =].

我尝试使用 belongsTo(),

Here's my modal Produk code

<?php namespace App; use Illuminate\Database\Eloquent\Model; class Produk extends Model { public $table = 'produk'; protected $primaryKey = 'pid'; protected $fillable = [ 'pid', 'p_nama', 'sku', 'p_harga', 'status' ]; }

Here's my modal Stock code

<?php namespace App; use Illuminate\Database\Eloquent\Model; class Stock extends Model { public $table = 'stock'; protected $primaryKey = 'sid'; protected $fillable = [ 'sid', 'p_nama', 'sku', 'p_stock_min', 'p_stock', 'status' ]; public function produk() { return $this->belongsTo('App\Produk', 'pid'); } }

My StockController

<?php namespace App\Http\Controllers; use Illuminate\Http\Request; use App\Stock; use App\Produk; use RealRashid\SweetAlert\Facades\Alert; class StockController extends Controller { public function index() { $datas = Stock::paginate(5); // 5 record per pages return view('stock.list', compact('datas')); // $datas = Stock::all(); // return $datas; } . . . . }

My View stock.blade

<div class="body"> <div> <a href="{{ route('stock.create')}}" class="btn btn-success btn-round" data-type="confirm"> <i class="zmdi zmdi-account-add"></i> Tambah Stock</a> <a style="margin: 2px;" href="{{ route('stock.index')}}" class="btn btn-primary btn-sm"><i class="zmdi zmdi-refresh"></i></a> </div> <div class="col-sm-12"> @if(session()->get('success')) <div class="alert alert-success"> {{ session()->get('success') }} </div> @endif </div> <table class="table table-bordered table-striped table-hover dataTable js-exportable"> <thead> <tr> <th class="text-center" style="width:5%">#</th> <th class="text-center" style="width:25%">Nama Produk</th> <th class="text-center" style="width:10%">SKU Produk</th> <th class="text-center" style="width:8%">Min. Stock</th> <th class="text-center" style="width:8%">Stock</th> <th class="text-center" style="width:10%">Status</th> <th class="text-center" style="width:10%">Aksi</th> </tr> </thead> <tbody> @if(!empty($datas) && $datas->count()) @foreach($datas as $data) <tr> <th class="text-center">{{ $loop->iteration }}</th> <td>{{ $data->produk }}</td> <td>{{ $data->p_nama }}</td> <td>{{ $data->p_stock_min }}<code> pcs</code></td> <td>{{ $data->p_stock }}<code> pcs</code></td> <td class="text-center">{{ $data->status }}</td> <td class="text-center"> <a href="{{ route('stock.edit', $data->sid)}}" title="Ubah" class="btn btn-warning btn-icon btn-icon-mini btn-round"> <i class="zmdi zmdi-edit"></i></span></a>  <a href="{{ route('stock.delete', $data->sid)}}" title="Hapus" class="btn btn-danger btn-icon btn-icon-mini btn-round" data-type="success"> <i class="zmdi zmdi-delete"></i></span></a> </td> </tr> @endforeach @else <tr> <td colspan="8">Data tidak ditemukan! Silahkan buat data Stock terlebih dahulu.</td> </tr> @endif </tbody> </table> {!! $datas->links() !!} </div>

Migration Stock

<?php use Illuminate\Database\Migrations\Migration; use Illuminate\Database\Schema\Blueprint; use Illuminate\Support\Facades\Schema; class CreateStocksTable extends Migration { /** * Run the migrations. * * @return void */ public function up() { Schema::create('stock', function (Blueprint $table) { $table->bigIncrements('sid'); $table->bigInteger('produk_id')->unsigned(); $table->string('p_nama'); $table->string('sku'); $table->integer('p_stock_min'); $table->integer('p_stock')->nullable(); $table->string('status'); $table->timestamps(); }); Schema::table('stock', function (Blueprint $table) { $table->foreign('produk_id')->references('pid')->on('produk') ->onDelete('cascade')->onUpdate('cascade'); }); } /** * Reverse the migrations. * * @return void */ public function down() { Schema::dropIfExists('stock'); } }

Response when i add data direct from PMA

[{"sid":1,"produk_id":6,"p_nama":"kopi1","sku":"12345678","p_stock_min":20,"p_stock":800,"status":"Aktif","created_at":"2020-11-24 16:37:16","updated_at":"2020-11-24 16:37:16"}, {"sid":2,"produk_id":7,"p_nama":"kopi2","sku":"87654321","p_stock_min":20,"p_stock":600,"status":"Aktif","created_at":"2020-11-24 16:37:16","updated_at":"2020-11-24 16:37:16"}]

我不知道我的错误在哪里？只想使用 select 形式将数据 p_produk 添加到股票 table 中，当我 select 它 sku 数据将生成与 table产品.

Answer 1

在您的 Stock 模型中，您应该将外键放在 belongsTo 关系中。像这样编辑方法：

  public function produk()
    {
        return $this->belongsTo('App\Produk', 'produk_id');
    }

Answer 2

因为您没有在

上命名您的列

如果你想像这样使用这个命名，你必须自己定义它：

 public function produk()
    {
        return $this->belongsTo('App\Produk', 'pid' , 'id');
    }

as belongsTo 连续取 $relatedModel , $foreignKey , $ownerKey

Answer 3

使用 Laravel 约定，关系产品应定义为

public function produk()
{
    return $this->belongsTo(Produk::class, 'produk_id', 'pid');
}

根据用户在显示 $produk->[=25 的 select 选项 selected 动态更改 create.blade.php 只读输入中的天空值=]:

为 sku

的只读输入提供一个 id

<div class="form-group">
    <label for="sku">SKU:</label>
    <input type="text" class="form-control  form-control-lg" name="sku" id="skuSelected" readonly/>
</div>

跟踪选项 selected in select control

<select class="form-control select2" name="p_name" onChange="setSku(this);">
    @foreach($produks as $produk)
        <option value="{{ $produk->pid }}">{{ $produk->p_nama }}</option>
    @endforeach
</select>

通过 javascript

处理 selection 的变化

<script>
 function setSku(sel) {
    const sku = sel.options[sel.selectedIndex].text;
    document.getElementById('skuSelected').value = sku;
 }
</script>

尝试在 Laravel 中使用 belongsTo 但它不起作用

Tried to using belongsTo in Laravel but its not working

php

mysql

laravel

laravel-6