我有以下型号:
Shop_list:
public function shopListItem()
{
return $this->hasMany(Shopping_list_item::class, 'shopping_list_id');
}
Shopping_list_item:
public function shoppingList()
{
return $this->belongsTo(Product::class);
}
public function product()
{
return $this->belongsTo(Product::class);
}
产品:
public function shopListItem()
{
return $this->hasMany(Shopping_list_item::class);
}
执行此代码时:
{{$shoppinglists->shopListItem()->first()}}
我得到以下正确结果:
{"id":1,"shopping_list_id":13,"product_id":69,"quantity":4,"created_at":"2016-09-05 19:23:35","updated_at":"2016-09-05 19:34:53"}
但如果我想循环并获得id:
@foreach($shoppinglists as $sh)
{{$sh->shopListItem()->id}}
@endforeach
然后我收到以下错误:
Call to a member function shopListItem() on boolean
问题:为什么在循环中对象被转换为布尔值?循环的正确方法是什么?
答案 0 :(得分:2)
如果要访问相关模型的属性,则需要使用对象,而不是函数。注意缺少括号。
{{$sh->shopListItem->id}}
由于它是hasMany
关系,shopListItem
将是您需要迭代的数组:
@foreach($sh->shopListItem AS $item)
{{ $item->id }}
@endforeach