Laravel 5+，将多个相同的集合聚集在一个数组中

Question

所以我有一个问题。我正在尝试收集用户 'Log' 信息（在此上下文中登录意味着维护问题或相关问题）。现在，每个日志集合 returned 都基于他们是哪种类型的用户。一个用户也可以是不止一种，比如租户，也可以是系统下的第三方。所以我需要 return 所有日志，即使它们有多种用户类型。这是我的代码：

    public function returnLogs() {

    if($this->isPosidaciousAdmin()) {

        //All logs
        return Log::all()->latest();

    } else {        

        //coalesce logs for each user type the user is

        if($this->isStaff()) {

            //Logs created under working agency ID and log assignee logs
            $logs[] = Log::where('agency_id', $this->activeAgencyId())
                        ->orWhere('created_by', $this->user_id)
                        ->latest()
                        ->get();

        } 

        if($this->isThirdParty()) {

            //Log Assignees logs

            //Get all assigned log IDs
            $assignedLogs = LogAssignee::select('log_id')->where('user_id', $this->user_id);

            //Find all logs with assigned log IDs
            $logs[] = Log::whereIn('log_id', $assignedLogs)->latest()->get();

        } 

        if($this->isTenant()) {

            //Logs at current property and logs created by tenant
            //If tenant currently has a tenancy
            if($this->currentProperty() !== null) {
                $logs[] = Log::where('created_by', $this->user_id)
                            ->orWhere('property_id', $this->currentProperty()->property_id)  
                            ->latest()               
                            ->get();
            } else {
                $logs[] = null;
            }
        }
    }

    return $logs;
}

这个问题是，如果他们是多个用户类型，则输出是数组与每个条目分开：

=> [
 Illuminate\Database\Eloquent\Collection {#829
   all: [
     App\Log {#830
       log_id: 1,
       log_title: "Test Log",
       log_type: "Maintenance",
       log_severity: "Normal",
       log_status: "Open",
       agency_id: 1,
       property_id: 1,
       created_by: 4,
       created_at: "2018-04-08 19:05:54",
       updated_at: "2018-04-08 20:07:48",
       deleted_at: null,
     },
   ],
 },
 Illuminate\Database\Eloquent\Collection {#837
   all: [],
 },

]

显然数组的第二部分没有数据，但您得到的是 returned 的格式。这在遍历数组时会导致问题。我只是想知道我是否可以 return 将所有日志信息放入数组中的相同索引 [0] 中？（然后我可以 return $log[0]）。

谢谢

Answer 1

您可以对集合使用 merge() 方法。

在您当前返回日志的地方尝试以下代码；

$mergedLogs = $logs[0];

// although arrays begin at 0 we've already got the first one
for ($i = 1; $i < count($logs); $i++) {
    $mergedLogs = $mergedLogs->merge($logs[$i]);
}

return $mergedLogs;

Laravel 5+，将多个相同的集合聚集在一个数组中

Laravel 5+, gathering more than one of the same collection in an array

php

collections

laravel

eloquent

laravel-5.6