Laravel收集使用地圖，幷包含

Question

我有問題map收集available密鑰。

available鍵使用contains方法。如果$ unavailableProducts中產品ID的值不包含在$ products中，它應該返回true ($value->product_id == $product->id)

我做錯了什麼？

$unavailableProducts = $this->unavailableProducts(); 
    $products = $this->products->all(); 

    $allProducts = $products->map(function ($product) use($unavailableProducts) { 
    return [ 
     'id'   => $product->id, 
     'title'   => $product->title, 
     'available'  => $unavailableProducts['result']->contains(function ($value, $key) use ($product) { 
      if ($value->product_id == $product->id) { 
       return false; 
      } 
      return true; 
     }), 
    ]; 
}); 

Answer 1

首先，確保$unavailableProductions['result']是一個集合。

其次，改變你的contains方法是這樣的：

$unavailableProducts = $this->unavailableProducts(); 
$products = $this->products->all(); 

$allProducts = $products->map(function ($product) use($unavailableProducts) { 
    return [ 
     'id'   => $product->id, 
     'title'   => $product->title, 
     'available'  => $unavailableProducts['result']->contains('id', $product->id), 
    ]; 
}); 

的$unavailableProducts['result']->contains('id', $product->id)將確定$unaviableProductions['result']集合有一個關鍵id其中值是$product->id