帶查詢的數組對象

Question

我想要做的是創建一個數組，其中包含標題名稱列表，數據庫行的id，然後是冠軍和競爭者的名稱。對於冠軍和競爭者的價值觀，我需要做一個額外的查詢來檢索人員名單。如果冠軍的值爲0，則需要爲陣列添加Vacant，如果隊列0爲競爭者，則使用TBD作爲陣列。以下是我正在處理的內容，其中包括查詢和print_r輸出。

我的問題是「不能肯定我在哪裏/如何需要運行對每個標題的冠軍的那些價值觀和競爭者進行另外的查詢。

/** 
    * Get titles champions 
    * 
    * @return object/NULL 
    */ 
    function getTitlesChampions() 
    {  
     $this->db->select('titlesList.id'); 
     $this->db->select('titlesList.titleName'); 
     $this->db->select('titlesChampions.championID'); 
     $this->db->select('titlesChampions.contender1ID'); 
     $this->db->select('titlesChampions.contender2ID'); 
     $this->db->select('titlesChampions.contender3ID'); 
     $this->db->from('titlesChampions'); 
     $this->db->join('titlesList', 'titlesList.id = titlesChampions.titlesListID'); 
     $query = $this->db->get(); 
     if ($query->num_rows() > 0) { 
      echo "<pre>"; 
      print_r ($query->result()); 
      echo "</pre>"; 

     }          
    } 

Array 
(
[0] => stdClass Object 
    (
     [id] => 1 
     [titleName] => Undisputed Heavyweight Title 
     [championID] => 1 
     [contender1ID] => 1 
     [contender2ID] => 1 
     [contender3ID] => 1 
    ) 

[1] => stdClass Object 
    (
     [id] => 2 
     [titleName] => Outlaw Title 
     [championID] => 1 
     [contender1ID] => 0 
     [contender2ID] => 0 
     [contender3ID] => 0 
    ) 

[2] => stdClass Object 
    (
     [id] => 3 
     [titleName] => Tag Team Titles 
     [championID] => 1 
     [contender1ID] => 0 
     [contender2ID] => 0 
     [contender3ID] => 0 
    ) 

) 

Answer 1

最佳實踐是一組額外的連接和子查詢，但是在給定模式的（假定）狀態的情況下，具有輔助功能可能是最簡單的。

對於找到的每個結果，您將通過調用getRosterName()來迭代並指定一個名稱。返回並向Champions對象添加更多信息。

/** 
* Get titles champions 
* 
* @return object/NULL 
*/ 
function getTitlesChampions() 
{ 
    $this->db->select('titlesList.id'); 
    $this->db->select('titlesList.titleName'); 
    $this->db->select('titlesChampions.championID'); 
    $this->db->select('titlesChampions.contender1ID'); 
    $this->db->select('titlesChampions.contender2ID'); 
    $this->db->select('titlesChampions.contender3ID'); 
    $this->db->from('titlesChampions'); 
    $this->db->join('titlesList', 'titlesList.id = titlesChampions.titlesListID'); 
    $query = $this->db->get(); 

    if ($query->num_rows() > 0) { 

     $result = query->result(); 

     foreach($result as $row) 
     { 
      // Iterate through 
      $row->championName  = $this->getRosterName($row->championID); 
      $row->contender1Name = $this->getRosterName($row->contender2ID); 
      $row->contender2Name = $this->getRosterName($row->contender2ID); 
      $row->contender3Name = $this->getRosterName($row->contender3ID); 
     } 

     // Return it 
     return $result; 

    } 
    return null; 
} 

/* 

/* Returns the name */ 
function getRosterName($rosterId = null) 
{ 

    if($rosterId && $rosterID > 0) 
    { 
     $this->db->select('RosterName'); 
     $this->db->where('rosterId', $rosterId); 
     $query = $this->db->get('roster'); // Or whatever your `roster` table is named. 
     return $query->row()->firstName; // Or whatever the name is you want returned 
    } 
    return null; 
} 

我對你的模式一無所知，所以這是一個黑暗中的鏡頭。

祝你好運。