php 控制器中的 laravel foreach 循环
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laravel foreach loop in controller
提问by thefalasifas
i have a problem about looping data in controller (laravel 4). my code is like this:
我有一个关于在控制器（laravel 4）中循环数据的问题。我的代码是这样的：
$owner = Input::get('owner');
$count = Input::get('count');
$product = Product::whereOwnerAndStatus($owner, 0)->take($count)->get();
when i want to use foreach to loop for $product result with code like this:
当我想使用 foreach 用这样的代码循环 $product 结果时：
foreach ($product->sku as $sku) {
// Code Here
}
the result is returning error Undefined property: Illuminate\Database\Eloquent\Collection::$sku
结果返回错误 未定义属性：Illuminate\Database\Eloquent\Collection::$sku
so, i try to improvise a little with this code:
所以，我试着用这段代码即兴创作：
foreach ($product as $items) {
foreach ($items->sku as $sku) {
// Code Here
}
}
the code returning error like this: Invalid argument supplied for foreach()
代码返回这样的错误： 为 foreach() 提供的参数无效
is there someone who could help me solve this?
有人可以帮我解决这个问题吗？
回答by alex t
Hi, this will throw an error:
你好，这会抛出一个错误：
foreach ($product->sku as $sku){
// Code Here
}
because you cannot loop a model with a specific column ($product->sku) from the table.
So you must loop on the whole model:
因为您不能从表中循环具有特定列 ( $product->sku) 的模型。
所以你必须在整个模型上循环：
foreach ($product as $p) {
// code
}
Inside the loop you can retrieve whatever column you want just adding "->[column_name]"
在循环内，您可以检索您想要添加的任何列，只需添加“->[column_name]”
foreach ($product as $p) {
echo $p->sku;
}
Have a great day
祝你有美好的一天
回答by Ghanshyam Nakiya
The view (blade template): Inside the loop you can retrieve whatever column you looking for
视图（刀片模板）：在循环内，您可以检索您要查找的任何列
@foreach ($products as $product)
{{$product->sku}}
@endforeach
回答by The Alpha
Actually your $producthas no data because the Eloquentmodel returns NULL. It's probably because you have used whereOwnerAndStatuswhich seems wrong and if there were data in $productthen it would not work in your first example because get()returns a collection of multiple models but that is not the case. The second example throws error because foreachdidn't get any data. So I think it should be something like this:
实际上你$product没有数据，因为Eloquent模型返回NULL。这可能是因为您使用了whereOwnerAndStatuswhich 似乎是错误的，如果有数据，$product那么它在您的第一个示例中将不起作用，因为get()返回多个模型的集合，但事实并非如此。第二个例子抛出错误，因为foreach没有得到任何数据。所以我认为它应该是这样的：
$owner = Input::get('owner');
$count = Input::get('count');
$products = Product::whereOwner($owner, 0)->take($count)->get();
Further you may also make sure if $productshas data:
此外，您还可以确保是否$products有数据：
if($product) {
return View:make('viewname')->with('products', $products);
}
Then in the view:
然后在view：
foreach ($products as $product) {
// If Product has sku (collection object, probably related models)
foreach ($product->sku as $sku) {
// Code Here
}
}
回答by Jake Wilson
Is skujust a property of the Productmodel? If so:
是否sku只是一个物业Product模型？如果是这样的话：
$products = Product::whereOwnerAndStatus($owner, 0)->take($count)->get();
foreach ($products as $product ) {
// Access $product->sku here...
}
Or is skua relationship to another model? If that is the case, then, as long as your relationship is setup properly, you code should work.
或者是sku与另一个模型的关系？如果是这种情况，那么只要您的关系设置正确，您的代码就应该可以工作。
