Question

我的数据库中有3个不同的表名为consoleConsole，consoleModel和consoleGame。然后我想要做的是每个控制台的内部都有一个循环用于它的模型，每个模型的内部都会有另一个循环用于它的游戏：

[
   {
      "Console":"PlayStation",
      "Information":[
         {
            "Model":"PlayStation 3",
            "Title":[
               {
                  "Game":"007 Legends",
                  "Publisher":"Electronic Arts"
               },
               {
                  "Game":"Ace Combat: Assault Horizon",
                  "Publisher":"Namco"
               }
            ]
         },
         {
            "Model":"PlayStation 2",
            "Title":[
               {
                  "Game":"007: Agent of Fire",
                  "Publisher":"Electronic Arts"
               },
               {
                  "Game":"Ace Combat 4: Shattered Skies",
                  "Publisher":"Namco"
               }
            ]
         },
         {
            "Model":"PlayStation 1",
            "Title":[
               {
                  "Game":"007 Racing",
                  "Publisher":"Electronic Arts"
               },
               {
                  "Game":"Ace Combat",
                  "Publisher":"Namco"
               }
            ]
         }
      ]
   },
   {
      "Console":"Wii",
      "Information":[
         {
            "Model":"Wii",
            "Title":[
               {
                  "Game":"007: Quantum of Solace",
                  "Publisher":"Activision"
               },
               {
                  "Game":"AC/DC Live: Rock Band Track Rack",
                  "Publisher":"MTV Games"
               }
            ]
         }
      ]
   },
   {
      "Console":"Xbox",
      "Information":[
         {
            "Model":"Xbox",
            "Title":[
               {
                  "Game":"AFL",
                  "Publisher":"Acclaim"
               },
               {
                  "Game":"American Chopper",
                  "Publisher":"Activision"
               }
            ]
         },
         {
            "Model":"Xbox 360",
            "Title":[
               {
                  "Game":"AFL Live",
                  "Publisher":"Electronic Arts"
               },
               {
                  "Game":"Akai Katana Shin",
                  "Publisher":"Cave"
               }
            ]
         }
      ]
   }
]

但遗憾的是，我没有使用我的数据库，而是直接用php文件编写它。

修改

无论如何，继续前进。我修改了我的代码，结果就像这样。

<?PHP
    $consoleQuery = "SELECT * ".
    "FROM consoleConsole ".
        "JOIN consoleModel ".
                "ON consoleConsole.consoleId = consoleModel.consoleId ".
            "JOIN consoleGame ".
                "ON consoleModel.modelId = consoleGame.gameId";

$consoleResult = mysql_query($consoleQuery);

$consoleFields = array_fill_keys(array(
    'consoleName',
    ), null);

$modelFields = array_fill_keys(array(
    'modelName',
    ), null);

$console = array();
$rowConsole = array();

while ($rowConsole = mysql_fetch_assoc($consoleResult)) {
    $consoleId = $rowConsole['consoleId'];
    $modelId = $row['modelId'];
    if (isset($console[$consoleId]['Information'])) {
        $console[$consoleId]['Information'][] = array_intersect_key($rowConsole, $modelFields);
    }

    else {
        $console[$consoleId] = array_intersect_key($rowConsole, $consoleFields);
        $console[$consoleId]['Information'] = array(array_intersect_key($rowConsole, $modelFields));
    }
}

$console = array_values($console);
echo json_encode($console);

?>

我能够产生输出，但它看起来不像上面的输出。

[
  {
    "consoleName": "PlayStation",
    "Information": [
      {
        "modelName": "PlayStation"
      },
      {
        "modelName": "PlayStation 2"
      },
      {
        "modelName": "PlayStation 3"
      },
      {
        "modelName": "PlayStation 3"
      }
    ]
  },
  {
    "consoleName": "Wii",
    "Information": [
      {
        "modelName": "Wii"
      },
      {
        "modelName": "Wii"
      }
    ]
  },
  {
    "consoleName": "Xbox",
    "Information": [
      {
        "modelName": "Xbox"
      },
      {
        "modelName": "Xbox 360"
      }
    ]
  }
]

他们的关系： enter image description here

我现在的问题是什么，我无法添加每个游戏的标题。

Answer 1

由于您使用php函数对json进行编码，因此它将以默认格式为您提供json。你需要做的是使用字符串操作创建自己的函数以获得所需的结果。

Answer 2

好的，所以我写了你的解决方案。您必须确保订单包含在那里，因为它假定您一起订购这些商品。我也不知道你的出版商是如何存储的，所以我把它分成了一个单独的表（这样你就可以通过发布者获得项目了），现在已经有4个连接了。另外在另一个注释上我已经更新它以进行内部连接。这样，对于没有分配任何游戏的控制台，您将不会获得空结果。如果你想要这些，你可以简单地改变连接，这样它也可以给你这些结果。如果有帮助，请告诉我

//get all of the information
$query = '
    SELECT c.consoleId,c.consoleName,m.modelId,m.modelName,g.gameId,g.gameName,p.publisherId,p.publisherName
    FROM `consoleconsole` c
        INNER JOIN `consolemodel` m ON c.consoleId=m.consoleId
        INNER JOIN `consolegame` g ON m.modelId=g.modelId
        INNER JOIN `consolepublisher` p ON g.publisherId = p.publisherId
    ORDER BY c.consoleName, m.modelName, g.gameName
';

//get the results
$result = mysql_query($query);

//setup array to hold information
$consoles = array();

//setup holders for the different types so that we can filter out the data
$consoleId = 0;
$modelId = 0;

//setup to hold our current index
$consoleIndex = -1;
$modelIndex = -1;

//go through the rows
while($row = mysql_fetch_assoc($result)){
    if($consoleId != $row['consoleId']){
        $consoleIndex++;
        $modelIndex = -1;
        $consoleId = $row['consoleId'];

        //add the console
        $consoles[$consoleIndex]['console'] = $row['consoleName'];

        //setup the information array
        $consoles[$consoleIndex]['information'] = array();
    }

    if($modelId != $row['modelId']){
        $modelIndex++;
        $modelId = $row['modelId'];

        //add the model to the console
        $consoles[$consoleIndex]['information'][$modelIndex]['model'] = $row['modelName'];

        //setup the title array
        $consoles[$consoleIndex]['information'][$modelIndex]['title'] = array();
    }

    //add the game to the current console and model
    $consoles[$consoleIndex]['information'][$modelIndex]['title'][] = array(
        'game'      => $row['gameName'],
        'publisher' => $row['publisherName']
    );
}

echo json_encode($consoles);

多个MySQL表到json_encode

2 个答案: