我正在使用Laravel 5.1& MySQL作为后端来提供从移动应用程序发出的REST-API请求。
我有购物车表和商品表。因此,每当用户访问移动应用程序中的' Items屏幕' 时,在后端我应该执行2个任务。
首先检查购物车中是否有任何物品。如果是(即Cart表中有项目),则从购物车表中获取这些商品,从商品表中获取其余商品。< / p>
如果购物车中有没有项目,那么我会轻松从Items表中提取所有商品并将其显示给用户。
我无法执行任务1.因为我首先从购物车表中检索所有 item_ids 。它将返回一个集合。现在我应该检查项目表中是否存在这些item_ids(来自购物车表)。如果是,请不要从项目表中获取这些项目,但是从项目表中获取所有其他项目。将这些项目与项目表&amp;来自购物车表的商品并将其展示给用户。我怎样才能做到这一点?
目前,问题是,我从购物车表获取所有&#39; item_ids&#39; 。它返回item-id的集合。使用foreach()
循环,对于每个 item_id ,我正在查询项目表,如下所示:
("*where('item_id','!=',$getItemId)->get();*")
$itemDetails = ItemBng::where('store_id','=',$store_id)->where('category_id','=',$category_id)->where('subcategory_id','=',$subcategory_id)->where('item_id','!=',$getItemId)->get();
它会针对每个单独的项目返回集合检查。并使用foreach循环中的每个新迭代替换集合。
以下是 CartController 中的功能:
public function getItemsWithCartItems($uuid,$store_id,$category_id,$subcategory_id,$subsubcategory_id=null)
{
try
{
$getCartItems = UserCartDetailBng::where('uuid','=',$uuid)->get();
if($getCartItems->isEmpty()) //Performing task 2. No problem here.
{
if($subsubcategory_id==null || $subsubcategory_id==0) // Bcoz, subsubcategory_id is optional
{
$itemDetails = ItemBng::where('store_id','=',$store_id)->where('category_id','=',$category_id)->where('subcategory_id','=',$subcategory_id)->get();
if($itemDetails->isEmpty()){
return ResponseService::buildFailureResponse("Store Item not found");
}
}
else
{
$itemDetails = ItemBng::where('store_id','=',$store_id)->where('category_id','=',$category_id)->where('subcategory_id','=',$subcategory_id)->where('subsubcategory_id','=',$subsubcategory_id)->get();
if($itemDetails->isEmpty()){
return ResponseService::buildFailureResponse("Store Item not found");
}
}
$count = $itemDetails->count();
$data = array('count'=>$count,'result'=>$itemDetails);
return ResponseService::buildSuccessResponse($data);
}
else //Performing task 1. Here is the problem.
{
// I am using "where('item_id','!=',$getItemId)->get()" And it returns collection checking against each individual item. and replaces collection with every new iteration in foreach loop.
foreach($getCartItems as $getCartItem)
{
$getItemId = $getCartItem->id;
if($subsubcategory_id==null || $subsubcategory_id==0)
{
$itemDetails = ItemBng::where('store_id','=',$store_id)->where('category_id','=',$category_id)->where('subcategory_id','=',$subcategory_id)->where('item_id','!=',$getItemId)->get();
if($itemDetails->isEmpty()){
return ResponseService::buildFailureResponse("Store items not found");
}
}
else
{
$itemDetails = ItemBng::where('store_id','=',$store_id)->where('category_id','=',$category_id)->where('subcategory_id','=',$subcategory_id)->where('subsubcategory_id','=',$subsubcategory_id)->where('item_id','!=',$getItemId)->get();
if($itemDetails->isEmpty()){
return ResponseService::buildFailureResponse("Store items not found");
}
}
$count = $itemDetails->count();
$data = array('count'=>$count,'result'=>$itemDetails);
return ResponseService::buildSuccessResponse($data);
}
}
}
请帮我解决这个问题,TIA。
答案 0 :(得分:3)
考虑到您的模型设置正确,请尝试使用此代码
//get the cart items with the item
$cartItems = UserCartDetailBng::where('uuid','=',$uuid)->with('itemsBng')->get();
if($cartItems->isEmpty())
{
//
}
else
{
//find items excluding of cart items
$itemDetails = ItemBng::where('store_id','=',$store_id)
->where('category_id','=',$category_id)
->where('subcategory_id','=',$subcategory_id)
->whereNotIn('id', $cartItems->lists('item_id'))->get();
$data = array('cartItems'=>$cartItems,'generalItems'=>$itemDetails);
return ResponseService::buildSuccessResponse($data);
}
答案 1 :(得分:2)
考虑在代码中添加以下内容
尝试后添加此内容
$getCartItemsIds = UserCartDetailBng::where('uuid','=',$uuid)->lists('id');
从else语句中删除foreach块和$ getItemId,然后使用
检索$ itemdetails$itemDetails = ItemBng::where('store_id','=',$store_id)->where('category_id','=',$category_id)->where('subcategory_id','=',$subcategory_id)->whereNotIn($getCartItemsIds)->get();
请注意,您有两个不同的$ itemDetails检索,编辑第二个也使用->whereNotIn($getCartItemsIds)
最后,根据您的意图,您应该编辑返回的$数据,以包括购物车上的内容。
$data = array('count'=>$count,'result'=>$itemDetails, 'cart'=>$getCartItems);