试图弄清楚为什么我的foreach导入不起作用

Question

I've on my view:

@foreach($cart_item->where('shopping_cart_id','37') as $cart) 

 <li class="clearfix">{{$cart->prize_id}}</li>

@endforeach

Can somebody help me figure out whats wrong with my foreach loop?

I have come down to just trying to basically displaying the id's but its giving me an php error.

"Undefined variable cart_item", but I did define the variable on the cart controller as so:

$cart_item = ShoppingCartItem::where('shopping_cart_id',$cookie->cart_id)->where('prize_id',$_POST['prize_id'])->first();

Answer 1

Based on your edited question, the solution is to pass $cart_item to your view.

Once that is done, you can just do the following:

@foreach($cart_item as $cart)

What you are currently doing is not the recommended way of doing it. This logic should be in your Controller and not your View.

Answer 2

You have to pass that variable to the view. I guess it's Laravel so just when calling your view add it to the comapct function

view('viewname', compact('cart_item'))

And like other suggested don't do it that way, it's better do define a scope function in that model that does it for you.

Answer 3

At first you are adding controller logic on a view, and that is really a bad practice.

Your problem looks like on your controller line:

$cart_item = ShoppingCartItem::where('shopping_cart_id',$cookie->cart_id)->where('prize_id',$_POST['prize_id'])->first();

Is returning NULL, it means the ShoppingCartItem is not found on your query or you are just not sending the variable to the view.

In your view you can control if the $cart_item variable exists like this:

@if(isset($cart_item))
  @foreach($cart_item->where('shopping_cart_id','37') as $cart) 

   <li class="clearfix">{{$cart->prize_id}}</li>

 @endforeach
@endif

This will prevent future errors in case the $cart_item variable is not set.

Answer 4

I think You should do like this

$cart_item = ShoppingCartItem::where('shopping_cart_id',$cookie->cart_id)->where('prize_id',$_POST['prize_id'])where('shopping_cart_id','37')->get();

and after that use it in your view

@foreach($cart_item as $cart) 

 <li class="clearfix">{{$cart->prize_id}}</li>

@endforeach