Laravel Dynamic Checkbox error: Trying to get property 'id' of non-object

Question

我想要达到的目标：用户可以为一个产品分配多个超市，也可以为多个产品分配多个超市。注册产品时，我希望用户能够 select 从数据库中填充的复选框。

Product.php

class Product extends Model
{
    //
    protected $fillable = [
        'name',
        'summary',
        'category_id',
        'author_id',
        'supermarket_id',
        'gf_rank_id',
        'average_price',
        'photo_id',
        'online_store_path',
        'ingredients',
    ];

    public function supermarket() {
        return $this->belongsToMany('App\Supermarket');
    }

}

Supermarket.php

class Supermarket extends Model
{
    protected $fillable = [
        'name',
        'url',
    ];

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

ProductsController.php

  public function create()
    {
        $categories = Category::pluck('name', 'id')->all();
        $supermarkets = Supermarket::pluck('name', 'id')->all();
        return view('admin.products.create', compact(['categories', 'supermarkets']));
    }

create.blade.php

        @foreach ($supermarkets as $supermarket)
        <div class="col-sm-3">
            {!! Form::checkbox('supermarket_id[]', $supermarket->id) !!}
            {!! Form::label('supermarkets', $supermarket) !!}
        </div>
        @endforeach

Answer 1

解释评论中所说的内容：

您没有在 $supermarkets 数据中提供对象，因为您正在使用 pluck('name','id')。您正在提供关联数组：

[ 
    1 => 'supermarket A',
    2 => 'supermarket B'
]

因此您需要将显示代码更改为：

@foreach ($supermarkets as $id => $name)
    <div class="col-sm-3">
        {!! Form::checkbox('supermarket_id[]', $id) !!}
        {!! Form::label('supermarkets', $name) !!}
    </div>
@endforeach

Laravel Dynamic Checkbox error: Trying to get property 'id' of non-object

Laravel Dynamic Checkbox error: Trying to get property 'id' of non-object

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