PHP MongoDB。检查嵌入文档是否包含整数

Question

我是 MongoDB 新手，正在尝试在嵌入文档中进行整数搜索。我的收藏如下

db.inventory.insertMany([{
    "store": "abc store",
    "games": [{
            "gameId": 12254,
            "score": 88
        },
        {
            "gameId": 12258,
            "score": 70
        },
        {
            "gameId": 12262,
            "score": 98
        }
    ]
}, {
    "store": "xyz store",
    "games": [{
            "gameId": 18244,
            "score": 88
        },
        {
            "gameId": 18248,
            "score": 25
        },
        {
            "gameId": 18252,
            "score": 66
        }
    ]
}]);

我想在集合中搜索例如 games.gameId 中的 122 并获得以下结果

[{
    "store": "abc store",
    "games": [{
            "gameId": 12254,
            "score": 88
        },
        {
            "gameId": 12258,
            "score": 70
        },
        {
            "gameId": 12262,
            "score": 98
        }
    ]
}]

Answer 1

• $filter 迭代 games.gameId 数字数组的 loo
• $toString 将数字转换为字符串
• $regexMatch 匹配上面转换后的字符串有任何“122”字符串
• $ne，过滤结果不能为空[]
• $expr 是使用聚合运算符的表达式条件

db.collection.find({
  $expr: {
    $ne: [
      {
        $filter: {
          input: "$games.gameId",
          cond: {
            $regexMatch: {
              input: { $toString: "$$this" },
              regex: "122"
            }
          }
        }
      },
      []
    ]
  }
})

Playground

• 如果我没记错的话，php 语法

$query = [
  '$expr' => [
    '$ne' => [
      [
        '$filter' => [
          "input" => '$games.gameId',
          "cond" => [
            '$regexMatch' => [
              "input" => ['$toString' => '$$this'],
              "regex" => "122"
            ]
          ]
        ]
      ],
      []
    ]
  ]
];

$cursor = $collection->find($query);