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mongodb如何对子文档进行分页

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Jun 06, 2016 pm 08:28 PM

mongodb php

文档结构如下：

<code>{
    "_id" : ObjectId("55dc145ef754a3342000002d"),
    "id" : 12,
    "title" : "炎炎夏日，跟我一起High翻天！",
    "content" : "酷暑7月，简直不能忍~~~！夏天。就应该是被西瓜，冰镇可乐，全家桶，空调和游戏包围着的天堂。外面的世界纷纷扰扰与我无关~~哇哈哈哈！！",
    "thumb" : "/201506/5592560017b6a.jpg",
    "banner" : "/201506/559255fa5366d.jpg",
    "order" : 11,
    "publish_time" : "2015-08-25",
    "game_num" : 14,
    "games" : [ 
        {
            "id" : 1128,
            "name_zh" : "追击野兽",
            "apk_size" : "38.15M",
            "apk_version_name" : "1.0.6",
            "apk_package_name" : "com.miniclip.beastquest",
            "apk_version_code" : "18",
            "game_rank" : 8,
            "customize_update_time" : "2015-05-18 00:00:00",
        }, 
        {
            "id" : 3276,
            "name_zh" : "世界僵尸大联盟",
            "apk_size" : "33.88M",
            "apk_version_name" : "3.3.3237",
            "apk_package_name" : "com.proletariat.worldzombination",
            "apk_version_code" : "33537",
            "game_rank" : 8,
            "customize_update_time" : "2015-05-15 00:00:00",
        }, 
        {
            "id" : 3416,
            "name_zh" : "围剿外星客",
            "apk_size" : "38.69M",
            "apk_version_name" : "1.7.1",
            "apk_package_name" : "com.outplayentertainment.aliencreeps",
            "apk_version_code" : "10070010",
            "game_rank" : 8,
            "customize_update_time" : "2015-04-25 00:00:00",
        }, 
        {
            "id" : 10357,
            "name_zh" : "合金弹头：防御",
            "apk_size" : "47.13M",
            "apk_version_name" : "1.27.0",
            "apk_package_name" : "com.snkplaymore.android003",
            "apk_version_code" : "52",
            "game_rank" : 8,
            "customize_update_time" : "0000-00-00 00:00:00",
        }, 
        {
            "id" : 10360,
            "name_zh" : "绿色忍者蛙年",
            "apk_size" : "47.7M",
            "apk_version_name" : "4",
            "apk_package_name" : "com.nitrome.greenninja",
            "apk_version_code" : "4",
            "game_rank" : 8,
            "customize_update_time" : "2015-06-30 15:52:10",
        }, 
        {
            "id" : 10364,
            "name_zh" : "杀死马里奥",
            "apk_size" : "31.16M",
            "apk_version_name" : "1.0.6",
            "apk_package_name" : "air.com.keybol.plumber",
            "apk_version_code" : "1000006",
            "game_rank" : 7,
            "customize_update_time" : "2015-06-30 16:08:09", 
        }, 
        {
            "id" : 10366,
            "name_zh" : "通过繁殖征服世界",
            "apk_size" : "44.83M",
            "apk_version_name" : "1.0.2",
            "apk_package_name" : "com.kt.SpermWarWorldWide_G",
            "apk_version_code" : "10002",
            "game_rank" : 8,
            "customize_update_time" : "2015-06-30 16:21:22", 
        }, 
        {
            "id" : 10229,
            "name_zh" : "冰块切割",
            "apk_size" : "7.14M",
            "apk_version_name" : "2.4.6",
            "apk_package_name" : "com.hyperkani.sliceice",
            "apk_version_code" : "30",
            "game_rank" : 7,
            "customize_update_time" : "2014-11-04 00:00:00",
        }, 
        {
            "id" : 10356,
            "name_zh" : "吃冰淇淋的怪房子",
            "apk_size" : "33.56M",
            "apk_version_name" : "1.0.2",
            "apk_package_name" : "com.firedroid.icecreamnomsters",
            "apk_version_code" : "4",
            "game_rank" : 8,
            "customize_update_time" : "0000-00-00 00:00:00",
        }, 
        {
            "id" : 10358,
            "name_zh" : "来杯果汁",
            "apk_size" : "42.11M",
            "apk_version_name" : "1.6.21",
            "apk_package_name" : "air.com.sgn.juicejam.gp",
            "apk_version_code" : "1006021",
            "game_rank" : 6,
            "customize_update_time" : "0000-00-00 00:00:00",
        }, 
        {
            "id" : 10362,
            "name_zh" : "梦游先生",
            "apk_size" : "48.52M",
            "apk_version_name" : "1.00",
            "apk_package_name" : "com.BEbit.MrSnoozleberg",
            "apk_version_code" : "1",
            "game_rank" : 8,
            "customize_update_time" : "2015-06-30 15:58:13",
        }, 
        {
            "id" : 10363,
            "name_zh" : "清凉方冰冰",
            "apk_size" : "23.14M",
            "apk_version_name" : "1.1",
            "apk_package_name" : "com.unilever.CoolCubeszzc",
            "apk_version_code" : "2",
            "game_rank" : 6,
            "customize_update_time" : "2015-06-30 16:04:56",
        }, 
        {
            "id" : 10365,
            "name_zh" : "嗜血狂鲨2",
            "apk_size" : "9.9M",
            "apk_version_name" : "2.6.1",
            "apk_package_name" : "com.fgol.shark2",
            "apk_version_code" : "13",
            "game_rank" : 8,
            "customize_update_time" : "2015-06-30 16:15:58",
        }, 
        {
            "id" : 10367,
            "name_zh" : "外星人爱牛奶",
            "apk_size" : "23.86M",
            "apk_version_name" : "1.0.7",
            "apk_package_name" : "air.com.rightfusion.alienslikemilk",
            "apk_version_code" : "1000007",
            "game_rank" : 8,
            "customize_update_time" : "2015-06-30 16:28:17",
        }
    ]
}</code>

Copy after login

如何对子文档games进行分页查询
比如一次只取3条数据

<code>{
            "id" : 1128,
            "name_zh" : "追击野兽",
            "apk_size" : "38.15M",
            "apk_version_name" : "1.0.6",
            "apk_package_name" : "com.miniclip.beastquest",
            "apk_version_code" : "18",
            "game_rank" : 8,
            "customize_update_time" : "2015-05-18 00:00:00",
        }, 
        {
            "id" : 3276,
            "name_zh" : "世界僵尸大联盟",
            "apk_size" : "33.88M",
            "apk_version_name" : "3.3.3237",
            "apk_package_name" : "com.proletariat.worldzombination",
            "apk_version_code" : "33537",
            "game_rank" : 8,
            "customize_update_time" : "2015-05-15 00:00:00",
        }, 
        {
            "id" : 3416,
            "name_zh" : "围剿外星客",
            "apk_size" : "38.69M",
            "apk_version_name" : "1.7.1",
            "apk_package_name" : "com.outplayentertainment.aliencreeps",
            "apk_version_code" : "10070010",
            "game_rank" : 8,
            "customize_update_time" : "2015-04-25 00:00:00",
        }
}</code>

Copy after login

回复内容：

文档结构如下：

<code>{
    "_id" : ObjectId("55dc145ef754a3342000002d"),
    "id" : 12,
    "title" : "炎炎夏日，跟我一起High翻天！",
    "content" : "酷暑7月，简直不能忍~~~！夏天。就应该是被西瓜，冰镇可乐，全家桶，空调和游戏包围着的天堂。外面的世界纷纷扰扰与我无关~~哇哈哈哈！！",
    "thumb" : "/201506/5592560017b6a.jpg",
    "banner" : "/201506/559255fa5366d.jpg",
    "order" : 11,
    "publish_time" : "2015-08-25",
    "game_num" : 14,
    "games" : [ 
        {
            "id" : 1128,
            "name_zh" : "追击野兽",
            "apk_size" : "38.15M",
            "apk_version_name" : "1.0.6",
            "apk_package_name" : "com.miniclip.beastquest",
            "apk_version_code" : "18",
            "game_rank" : 8,
            "customize_update_time" : "2015-05-18 00:00:00",
        }, 
        {
            "id" : 3276,
            "name_zh" : "世界僵尸大联盟",
            "apk_size" : "33.88M",
            "apk_version_name" : "3.3.3237",
            "apk_package_name" : "com.proletariat.worldzombination",
            "apk_version_code" : "33537",
            "game_rank" : 8,
            "customize_update_time" : "2015-05-15 00:00:00",
        }, 
        {
            "id" : 3416,
            "name_zh" : "围剿外星客",
            "apk_size" : "38.69M",
            "apk_version_name" : "1.7.1",
            "apk_package_name" : "com.outplayentertainment.aliencreeps",
            "apk_version_code" : "10070010",
            "game_rank" : 8,
            "customize_update_time" : "2015-04-25 00:00:00",
        }, 
        {
            "id" : 10357,
            "name_zh" : "合金弹头：防御",
            "apk_size" : "47.13M",
            "apk_version_name" : "1.27.0",
            "apk_package_name" : "com.snkplaymore.android003",
            "apk_version_code" : "52",
            "game_rank" : 8,
            "customize_update_time" : "0000-00-00 00:00:00",
        }, 
        {
            "id" : 10360,
            "name_zh" : "绿色忍者蛙年",
            "apk_size" : "47.7M",
            "apk_version_name" : "4",
            "apk_package_name" : "com.nitrome.greenninja",
            "apk_version_code" : "4",
            "game_rank" : 8,
            "customize_update_time" : "2015-06-30 15:52:10",
        }, 
        {
            "id" : 10364,
            "name_zh" : "杀死马里奥",
            "apk_size" : "31.16M",
            "apk_version_name" : "1.0.6",
            "apk_package_name" : "air.com.keybol.plumber",
            "apk_version_code" : "1000006",
            "game_rank" : 7,
            "customize_update_time" : "2015-06-30 16:08:09", 
        }, 
        {
            "id" : 10366,
            "name_zh" : "通过繁殖征服世界",
            "apk_size" : "44.83M",
            "apk_version_name" : "1.0.2",
            "apk_package_name" : "com.kt.SpermWarWorldWide_G",
            "apk_version_code" : "10002",
            "game_rank" : 8,
            "customize_update_time" : "2015-06-30 16:21:22", 
        }, 
        {
            "id" : 10229,
            "name_zh" : "冰块切割",
            "apk_size" : "7.14M",
            "apk_version_name" : "2.4.6",
            "apk_package_name" : "com.hyperkani.sliceice",
            "apk_version_code" : "30",
            "game_rank" : 7,
            "customize_update_time" : "2014-11-04 00:00:00",
        }, 
        {
            "id" : 10356,
            "name_zh" : "吃冰淇淋的怪房子",
            "apk_size" : "33.56M",
            "apk_version_name" : "1.0.2",
            "apk_package_name" : "com.firedroid.icecreamnomsters",
            "apk_version_code" : "4",
            "game_rank" : 8,
            "customize_update_time" : "0000-00-00 00:00:00",
        }, 
        {
            "id" : 10358,
            "name_zh" : "来杯果汁",
            "apk_size" : "42.11M",
            "apk_version_name" : "1.6.21",
            "apk_package_name" : "air.com.sgn.juicejam.gp",
            "apk_version_code" : "1006021",
            "game_rank" : 6,
            "customize_update_time" : "0000-00-00 00:00:00",
        }, 
        {
            "id" : 10362,
            "name_zh" : "梦游先生",
            "apk_size" : "48.52M",
            "apk_version_name" : "1.00",
            "apk_package_name" : "com.BEbit.MrSnoozleberg",
            "apk_version_code" : "1",
            "game_rank" : 8,
            "customize_update_time" : "2015-06-30 15:58:13",
        }, 
        {
            "id" : 10363,
            "name_zh" : "清凉方冰冰",
            "apk_size" : "23.14M",
            "apk_version_name" : "1.1",
            "apk_package_name" : "com.unilever.CoolCubeszzc",
            "apk_version_code" : "2",
            "game_rank" : 6,
            "customize_update_time" : "2015-06-30 16:04:56",
        }, 
        {
            "id" : 10365,
            "name_zh" : "嗜血狂鲨2",
            "apk_size" : "9.9M",
            "apk_version_name" : "2.6.1",
            "apk_package_name" : "com.fgol.shark2",
            "apk_version_code" : "13",
            "game_rank" : 8,
            "customize_update_time" : "2015-06-30 16:15:58",
        }, 
        {
            "id" : 10367,
            "name_zh" : "外星人爱牛奶",
            "apk_size" : "23.86M",
            "apk_version_name" : "1.0.7",
            "apk_package_name" : "air.com.rightfusion.alienslikemilk",
            "apk_version_code" : "1000007",
            "game_rank" : 8,
            "customize_update_time" : "2015-06-30 16:28:17",
        }
    ]
}</code>

Copy after login

如何对子文档games进行分页查询
比如一次只取3条数据

<code>{
            "id" : 1128,
            "name_zh" : "追击野兽",
            "apk_size" : "38.15M",
            "apk_version_name" : "1.0.6",
            "apk_package_name" : "com.miniclip.beastquest",
            "apk_version_code" : "18",
            "game_rank" : 8,
            "customize_update_time" : "2015-05-18 00:00:00",
        }, 
        {
            "id" : 3276,
            "name_zh" : "世界僵尸大联盟",
            "apk_size" : "33.88M",
            "apk_version_name" : "3.3.3237",
            "apk_package_name" : "com.proletariat.worldzombination",
            "apk_version_code" : "33537",
            "game_rank" : 8,
            "customize_update_time" : "2015-05-15 00:00:00",
        }, 
        {
            "id" : 3416,
            "name_zh" : "围剿外星客",
            "apk_size" : "38.69M",
            "apk_version_name" : "1.7.1",
            "apk_package_name" : "com.outplayentertainment.aliencreeps",
            "apk_version_code" : "10070010",
            "game_rank" : 8,
            "customize_update_time" : "2015-04-25 00:00:00",
        }
}</code>

Copy after login

<code>> db.test1.find().pretty()
{
    "_id" : ObjectId("55dc145ef754a3342000002d"),
    "games" : [
        {
            "id" : 1128,
            "name_zh" : "追击野兽",
            "customize_update_time" : "2015-05-18 00:00:00"
        },
        {
            "id" : 3276,
            "name_zh" : "dasda",
            "customize_update_time" : "2015-05-15 00:00:00"
        },
        {
            "id" : 3416,
            "name_zh" : "围剿外星客",
            "customize_update_time" : "2015-04-25 00:00:00"
        },
        {
            "id" : 10357,
            "name_zh" : "合金弹头：防御",
            "customize_update_time" : "0000-00-00 00:00:00"
        },
        {
            "id" : 10360,
            "name_zh" : "绿色忍者蛙年",
            "customize_update_time" : "2015-06-30 15:52:10"
        },
        {
            "id" : 10364,
            "name_zh" : "杀死马里奥",
            "customize_update_time" : "2015-06-30 16:08:09"
        },
        {
            "id" : 10366,
            "name_zh" : "通过繁殖征服世界",
            "customize_update_time" : "2015-06-30 16:21:22"
        },
        {
            "id" : 10229,
            "name_zh" : "冰块切割",
            "customize_update_time" : "2014-11-04 00:00:00"
        },
        {
            "id" : 10356,
            "name_zh" : "吃冰淇淋的怪房子",
            "customize_update_time" : "0000-00-00 00:00:00"
        },
        {
            "id" : 10358,
            "name_zh" : "来杯果汁",
            "customize_update_time" : "0000-00-00 00:00:00"
        },
        {
            "id" : 10362,
            "name_zh" : "梦游先生",
            "customize_update_time" : "2015-06-30 15:58:13"
        },
        {
            "id" : 10363,
            "name_zh" : "清凉方冰冰",
            "customize_update_time" : "2015-06-30 16:04:56"
        },
        {
            "id" : 10365,
            "name_zh" : "嗜血狂鲨2",
            "customize_update_time" : "2015-06-30 16:15:58"
        },
        {
            "id" : 10367,
            "name_zh" : "外星人爱牛奶",
            "customize_update_time" : "2015-06-30 16:28:17"
        }
    ]
}</code>

Copy after login

取games的前3条数据：

<code>> db.test1.find({"_id" : ObjectId("55dc145ef754a3342000002d")},{"games":{ "$slice":[0,3]}}).pretty()
{
    "_id" : ObjectId("55dc145ef754a3342000002d"),
    "games" : [
        {
            "id" : 1128,
            "name_zh" : "追击野兽",
            "customize_update_time" : "2015-05-18 00:00:00"
        },
        {
            "id" : 3276,
            "name_zh" : "dasda",
            "customize_update_time" : "2015-05-15 00:00:00"
        },
        {
            "id" : 3416,
            "name_zh" : "围剿外星客",
            "customize_update_time" : "2015-04-25 00:00:00"
        }
    ]
}</code>

Copy after login

取第四条到第6条数据：

<code>> db.test1.find({"_id" : ObjectId("55dc145ef754a3342000002d")},{"games":{ "$slice":[3,3]}}).pretty()
{
    "_id" : ObjectId("55dc145ef754a3342000002d"),
    "games" : [
        {
            "id" : 10357,
            "name_zh" : "合金弹头：防御",
            "customize_update_time" : "0000-00-00 00:00:00"
        },
        {
            "id" : 10360,
            "name_zh" : "绿色忍者蛙年",
            "customize_update_time" : "2015-06-30 15:52:10"
        },
        {
            "id" : 10364,
            "name_zh" : "杀死马里奥",
            "customize_update_time" : "2015-06-30 16:08:09"
        }
    ]
}</code>

Copy after login

依次类推，即可。 "$slice":[3,3] 第一个3表示查询数组下标的起始位置，第二个3表示取的数据条数。建议games不要过多，不然会超出文档限制16M。不过这个可能是设计问题，我多想了。

第二种方法：就是用代码从数据库中取出来，将games里面的每一个子文档封装成model，放在缓存中做分页，而不是数据库级别的分页也可实现

第三种方法：从数据可看出games里面的子文档是按照id进行排序的，那么也就是说子文档是可比较的，那么就可以使用$gt和$lt，接合$size取数据，我没有试。你可以尝试一下。不过$slice获取数组子集更方便一点。

用limit(n)可以限制只获取n条数据。skip(n)可以跳过n条数据,两者结合可以实现分页吧？不过skip比较消耗资源少用为妙。

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CakePHP is an open-source framework for PHP. It is intended to make developing, deploying and maintaining applications much easier. CakePHP is based on a MVC-like architecture that is both powerful and easy to grasp. Models, Views, and Controllers gu

CakePHP Working with Database Sep 10, 2024 pm 05:25 PM

Working with database in CakePHP is very easy. We will understand the CRUD (Create, Read, Update, Delete) operations in this chapter.

CakePHP Creating Validators Sep 10, 2024 pm 05:26 PM

Validator can be created by adding the following two lines in the controller.

How To Set Up Visual Studio Code (VS Code) for PHP Development Dec 20, 2024 am 11:31 AM

Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c

CakePHP Logging Sep 10, 2024 pm 05:26 PM

Logging in CakePHP is a very easy task. You just have to use one function. You can log errors, exceptions, user activities, action taken by users, for any background process like cronjob. Logging data in CakePHP is easy. The log() function is provide

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