Laravel 5. How to iterate through Eloquent properties - php

Question

I have the following function in Controller:
public function getProduct()
{
return Product::join('shopping_list_items', 'products.id', '=', 'shopping_list_items.product_id' )
->join('shop_lists', 'shop_lists.id', '=', 'shopping_list_items.shopping_list_id')
->select('products.product_name', 'products.id')
->where('shop_lists.id', $this->id);
}
This code in the view works perfectly and shows product name:
{{$shoppinglists->getProduct()->first()->product_name}}
But I can't loop through it like this:
#foreach($shoppinglists->getProduct() as $sh)
{{$sh->product_name}}<br>
#endforeach
Though it doesn't show any error.

Answer 1

Your getProduct() method returns an instance of the Database Builder, not the collection, that is why you can do ->first(), which basically does a fetch limit 1 and gets you the object.
So, you need to call the ->get() or maybe paginate() to actually do a fetch of the data to the database and obtain the collection of objects.
So, bottom line, just do:
#foreach($shoppinglists->getProduct()->get() as $sh)
{{$sh->product_name}}<br>
#endforeach

Answer 2

As #Carlos explained, you need to use get() to get values from database.
public function getProduct()
{
return Product::join('shopping_list_items', 'products.id', '=', 'shopping_list_items.product_id' )
->join('shop_lists', 'shop_lists.id', '=', 'shopping_list_items.shopping_list_id')
->select('products.product_name', 'products.id')
->where('shop_lists.id', $this->id)
->get();
}
This will return you a JSON object. If you need an array output from this query, use pluck('filed name'); instead of get();
In your view, use
#foreach($shoppinglists as $sh)
{{$sh->product_name}}<br>
#endforeach