如何根據查詢結果中的字段創建分組結構？

我想在cakephp3中按年份分組。我能夠得到使用以下方式的數據，但它不是仍在逐年分組如何根據查詢結果中的字段創建分組結構？

$query = $this->Alerts->query(); 
$year = $query->func()->year([ 
    'added_on' => 'literal' 
]); 

$month = $query->func()->monthname(['added_on' => 'literal']); 
$monthAlertsCount = $query->func()->count($month); 
$data = $query 
    ->select([ 
     'year' => $year, 
     'month' => $month, 
     'count' => $monthAlertsCount 
    ]) 
    ->group($year) 
    ->group($month); 

$status = "success"; 
$this->set('response', $status); 
$this->set('year', $data); 
$this->set('_serialize', ['response','year']);

電流輸出如下（我想要的方式。）：

{ 

    "response":"success", 
    "year":[ 
     { 
      "year":"2013", 
      "month":"November", 
      "count":"1" 
     }, 
     { 
      "year":"2014", 
      "month":"February", 
      "count":"2" 
     }, 
     { 
      "year":"2014", 
      "month":"January", 
      "count":"3" 
     }, 
     { 
      "year":"2015", 
      "month":"December", 
      "count":"6" 
     }, 
     { 
      "year":"2015", 
      "month":"February", 
      "count":"3" 
     }, 
     { 
      "year":"2015", 
      "month":"January", 
      "count":"4" 
     }, 
     { 
      "year":"2016", 
      "month":"January", 
      "count":"83" 
     } 
    ] 

}

預期輸出：

{ 

    "response":"success", 
    "year":[ 
     { 
      "2013":[ 
       { 
        "month":"November", 
        "count":"1" 
       } 
      ], 
      "2014":[ 
       { 
        "month":"February", 
        "count":"2" 
       }, 
       { 
        "month":"January", 
        "count":"3" 
       } 
      ], 
      "2015":[ 
       { 
        "month":"December", 
        "count":"6" 
       }, 
       { 
        "month":"February", 
        "count":"3" 
       }, 
       { 
        "month":"January", 
        "count":"4" 
       } 
      ], 
      "2016":[ 
       { 
        "month":"January", 
        "count":"83" 
       } 
      ] 
     } 
    ] 

}

任何人都可以幫我在cakephp3中獲得預期的輸出嗎？

來源

2016-01-12 Akshay Malhotra

使用收集方法groupBy() - 記住，查詢是集合對象（種類）！

$data = $query 
    ->select([ 
     'year' => $year, 
     'month' => $month, 
     'count' => $monthAlertsCount 
    ]) 
    ->group($year) 
    ->group($month) 
    ->groupBy('year');

這將創建所需的分組結構，但它不會從各行，如果你想移除這些刪除year領域，使用映射器，像

// ... 
->groupBy('year') 
->map(function ($rows) { 
    foreach ($rows as &$row) { 
     unset($row['year']); 
    } 
    return $rows; 
});

也見

來源

2016-01-13 07:16:50 ndm

斐伊川，感謝您的回覆，這幾乎接近我想要的，但我不是仍然能夠除去年 - > GROUPBY（ '年'） - > map（函數（$ row））{$ row ['year']）; return $ row; }）; 不會從輸出中刪除年份 –

@AkshayMalhotra忘記了映射器不會遍歷組...檢查更新的代碼示例。 – ndm

萬分感謝你！有效。 –

如何根據查詢結果中的字段創建分組結構？

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