Level 58
The N+1 error is occurring because the code is making a separate query for each unused asset in the foreach loop. To solve this, we can use eager loading to load all the assets in one query. Here's an updated version of the code that uses eager loading:
// Get all the assets used
$usedassets = UsedAsset::query()->where('token', $token)->get();
// Get the IDs of all the assets used
$usedAssetIDs = collect($usedassets)->pluck('asset_id');
// Get all the assets this user has access to, with eager loading
$allAssets = Asset::query()->with('usedAssets')->where('token', $user_token)->get();
// Get the IDs of all assets available
$allAssetIDs = collect($allAssets)->pluck('id');
//Set up an empty collection
$unusedAssets = collect();
foreach($allAssets as $asset)
{
// Check if the asset is unused
if(!in_array($asset->id, $usedAssetIDs->toArray()))
{
$unusedAssets->push($asset);
}
}
In this updated code, we're using eager loading to load all the used assets for each asset in the $allAssets collection. Then, we're looping through each asset and checking if it's unused by checking if its ID is in the $usedAssetIDs array. If it's unused, we add it to the $unusedAssets collection.
This should eliminate the N+1 error and make the code more efficient.
