如果在laravel elokent上完成创建或更新in-loop,如何返回true或false?

如果在Eloquent将更改保存到数据库时出错,将引发异常。您可以简单地用

public function synch($apiItems)
{
  try {

    // your code goes here

    return true;
  } catch (Exception $e) {
    return false;
  }
}

注:

在代码中添加try-catch。变更如下:

public function synch($apiItems)
{
    try{
        $itemsLocal = $this->item->get();
        foreach ($apiItems as $key) {
            $check = $itemsLocal->filter(function ($item) use ($key) {
                return $item->code == $key->Code;
            });
            if ($check->count() < 1) {
                $this->item->create([
                    'code' => $key->Code,
                    'description' => $key->Description,
                    'attribute_code' => $key->Attribute_Code,                
                    'flag' => $key->Flag
                ]);
            } 
            else {
                if($key->Flag === false) {
                    $this->item->where(['code' => $check->first()->code])->update([
                        'description' => $key->Description,
                        'attribute_code' => $key->Attribute_Code,
                        'flag' => $key->Flag
                    ]);
                }
            }
        }

        return true;
    } catch (Exception $e) {
        return false;
    }
}