过滤现有模型数据 laravel

Posted 2023-02-25

【中文标题】过滤现有模型数据 laravel

【英文标题】：Filter existing model data laravel

【发布时间】：2019-02-18 06:25:12

【问题描述】：

我有一个使用 hydrate 填充的模型，我现在需要遍历这个模型并针对每个办公室返回一个新的模型实例。但是，无论我尝试什么，我都无法让第二个 foreach 循环工作。

遗憾的是 $data 数组需要采用这种格式，我无法多次查询该表，因为它是一个临时表，可能会消失。

$Model = new RegionModel();
$ReportReturnData = App::make('stdClass');
$Query = "SELECT Region, Office, Manager, SUM(Bills) AS Bills FROM ##TMP_ReportData GROUP BY Region, Office, Manager";
$ReportData = $Model->hydrate(
    DB::select($query)
);
$Offices = $ReportData->unique('Office')->pluck('Office');
foreach ($Offices as $Office)//This loop works fine

    $Class = App::make('stdClass');
    $OfficeName = $Office;
    $Entries = [];
    $TotalBilled = 0;
    $EntryClass = $ReportData->where('Office', '=', $OfficeName)->groupby('Manager');// this doesn't work.

    // at present I have to do this which adds extra load on the DB
    $SubQuery = "SELECT Manager, SUM(Bills) AS Bulls FROM ##TMP_ReportData WHERE Office = ? GROUP BY Manager";
    $EntryClass = DB::select($SubQuery , [$OfficeName]);

    foreach ($EntryClass as $Entry)
        $Line = App::make('stdClass');
        $Line->Office=$OfficeName;
        $Line->Manager = $Entry->Manager;
        $Line->Bills = $Entry->Bills;
        $TotalBilled += $Entry->Bills;
        $Entries[] = $Line;
    
    $Class->Name = $OfficeName;
    $Class->TotalBilled = $TotalBilled;
    $Class->Entries = $Entries;
    $ReportReturnData->Offices[] = $Class;

$Total = App::make('stdClass');
$Total->TotalBilled = $ReportData->sum('Bills');
$data = [
        'RegionName' => $RegionName,
        'DateFrom' => $DateFrom,
        'DateTill' => $DateTill,

        'Entries' => $ReportReturnData,
        'AVG' => $AVG,
        'Total' => $Total,

        'ReportDate' => $ReportDate,
        'LogoImage' => $LogoImage
    ];

【问题讨论】：

“无法使第二个 foreach 循环工作”是什么意思？预期结果与实际结果如何？

@JonasStaudenmeir 第二个 for 循环产生错误，我最终不得不做另一个原始 DB::select 调用，理想情况下我想避免这种情况，因为所有信息都在创建的模型中跨度>

错误是什么？

@JonasStaudenmeir 问题出在数据格式上。我会用更多代码更新问题。

预期结果与实际结果是什么？

【参考方案1】：

您的 laravel 查询生成器不正确，请尝试：$EntryClass = $ReportData->where('Office', '=', $OfficeName)->groupBy('Manager')->get();

您最后错过了get()，这导致 laravel 不将数据收集到数组中，groupBy 也按照 documentation 进行了驼峰化处理