mongodbで唯一の時間を比較することはできますか？

Question

ホテルのhappyHoursを日付形式で保存しました。今、私はhappyHoursが現在の時間よりも大きいすべてのホテルを取得したいと思います。

私の知識によると、結果を取得する日付比較があることを知っていますが、これは全体の日付時間オブジェクトを比較します。

時間を比較する方法はありますか？デシベルで

Happyhours日付オブジェクトサンプル：

"happyHours" : { 
    "mon" : [ 
     { 
      "startTime" : ISODate("2016-04-11T06:30:59.000Z"), 
      "endTime" : ISODate("2016-04-11T14:30:59.000Z") 
     } 
    ], 
    "tue" : [ 
     { 
      "startTime" : ISODate("2016-04-11T06:30:59.000Z"), 
      "endTime" : ISODate("2016-04-11T14:30:59.000Z") 
     } 
    ], 
    "wed" : [ 
     { 
      "startTime" : ISODate("2016-04-11T06:30:59.000Z"), 
      "endTime" : ISODate("2016-04-11T14:30:59.000Z") 
     } 
    ], 
    "thu" : [ 
     { 
      "startTime" : ISODate("2016-04-11T06:30:59.000Z"), 
      "endTime" : ISODate("2016-04-11T14:30:59.000Z") 
     } 
    ], 
    "fri" : [ 
     { 
      "startTime" : ISODate("2016-04-11T06:30:59.000Z"), 
      "endTime" : ISODate("2016-04-11T14:30:59.000Z") 
     } 
    ], 
    "sat" : [ 
     { 
      "startTime" : ISODate("2016-04-11T06:30:59.000Z"), 
      "endTime" : ISODate("2016-04-11T14:30:59.000Z") 
     } 
    ], 
    "sun" : [ 
     { 
      "startTime" : ISODate("2016-04-11T06:30:59.000Z"), 
      "endTime" : ISODate("2016-04-11T14:30:59.000Z") 
     } 
    ] 
} 

Answer 1

で起動するには、現在のスキーマを問い合わせるための助長されていません。配列は、あなたがキーとして平日を維持していたならば、より良いアプローチは、配列を失い、ただの要素を参照するようになり、この場合には本当に必要はありません。しかし

"happyHours": { 
    "mon": { 
     "startTime" : ISODate("2016-04-11T06:30:59.000Z"), 
     "endTime" : ISODate("2016-04-11T14:30:59.000Z") 
    }, 
    ... 
    "sun": { 
     "startTime" : ISODate("2016-04-11T06:30:59.000Z"), 
     "endTime" : ISODate("2016-04-11T14:30:59.000Z") 
    }  
} 

---

、はるかに良いですクエリーをはるかに簡単に思い起こさせる設計。あなたは、平日を記述した文書を保持している配列にhappyHoursフィールドを変換する時間を起動し、次のようにそれぞれ分、終了時間と分を始めることができる：

"happyHours": [ 
    { 
     "weekDay": "mon", 
     "startHour": 6, 
     "startMinutes": 30, 
     "endHour": 14 
     "endMinutes": 30 
    } 
    ... 
] 

その後、照会は以下のようになります：

var now = new Date(), 
    days = ['sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sun'], 
    weekDay = days[now.getDay()], 
    hour = now.getHours(), 
    minutes = now.getMinutes(); 

db.hotels.find({ 
    "happyHours.weekDay": weekDay, 
    "happyHours.startHour": { "$lte": hour }, 
    "happyHours.startMinutes": { "$lte": minutes }, 
    "happyHours.endHour": { "$gte": hour }, 
    "happyHours.endMinutes": { "$gte": minutes } 
}) 

---

上記の推奨事項に準拠するようにスキーマを変更する能力がない場合は、集約フレームワークが回避策を提供します。

var now = new Date(), 
    days = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sun'], 
    weekDay = days[now.getDay()], 
    hour = now.getHours(), 
    minutes = now.getMinutes(); 
    project = { 
    "$project": { 
     "otherfields": 1, 
     "happyHours": 1, 
     "happyHoursMonStartHour": { "$hour": "$happyHours.mon.startTime" }, 
     "happyHoursMonStartMinutes": { "$minute": "$happyHours.mon.startTime" }, 
     "happyHoursMonEndHour": { "$hour": "$happyHours.mon.endTime" }, 
     "happyHoursMonEndMinutes": { "$minute": "$happyHours.mon.endTime" }, 
     "happyHoursTueStartHour": { "$hour": "$happyHours.tue.startTime" }, 
     "happyHoursTueStartMinutes": { "$minute": "$happyHours.tue.startTime" }, 
     "happyHoursTueEndHour": { "$hour": "$happyHours.tue.endTime" }, 
     "happyHoursTueEndMinutes": { "$minute": "$happyHours.tue.endTime" }, 
     "happyHoursWedStartHour": { "$hour": "$happyHours.wed.startTime" }, 
     "happyHoursWedStartMinutes": { "$minute": "$happyHours.wed.startTime" }, 
     "happyHoursWedEndHour": { "$hour": "$happyHours.wed.endTime" }, 
     "happyHoursWedEndMinutes": { "$minute": "$happyHours.wed.endTime" }, 
     "happyHoursThuStartHour": { "$hour": "$happyHours.thu.startTime" }, 
     "happyHoursThuStartMinutes": { "$minute": "$happyHours.thur.startTime" }, 
     "happyHoursThuEndHour": { "$hour": "$happyHours.thu.endTime" }, 
     "happyHoursThuEndMinutes": { "$minute": "$happyHours.thu.endTime" }, 
     "happyHoursFriStartHour": { "$hour": "$happyHours.fri.startTime" }, 
     "happyHoursFriStartMinutes": { "$minute": "$happyHours.fri.startTime" }, 
     "happyHoursFriEndHour": { "$hour": "$happyHours.fri.endTime" }, 
     "happyHoursFriEndMinutes": { "$minute": "$happyHours.fri.endTime" }, 
     "happyHoursSatStartHour": { "$hour": "$happyHours.sat.startTime" }, 
     "happyHoursSatStartMinutes": { "$minute": "$happyHours.sat.startTime" }, 
     "happyHoursSatEndHour": { "$hour": "$happyHours.sat.endTime" }, 
     "happyHoursSatEndMinutes": { "$minute": "$happyHours.sat.endTime" }, 
     "happyHoursSunStartHour": { "$hour": "$happyHours.sun.startTime" }, 
     "happyHoursSunStartMinutes": { "$minute": "$happyHours.sun.startTime" }, 
     "happyHoursSunEndHour": { "$hour": "$happyHours.sun.endTime" }, 
     "happyHoursSunEndMinutes": { "$minute": "$happyHours.sun.endTime" }, 
    } 
    }, 
    match = { "$match": {} },  
    pipeline = [ 
    { "$unwind": "$happyHours.mon" }, 
    { "$unwind": "$happyHours.tue" }, 
    { "$unwind": "$happyHours.wed" }, 
    { "$unwind": "$happyHours.thur" }, 
    { "$unwind": "$happyHours.fri" }, 
    { "$unwind": "$happyHours.sat" }, 
    { "$unwind": "$happyHours.sun" }  
    ]; 

match["$match"]["happyHours"+ weekDay +"StartHour"] = { "$lte": hour }; 
match["$match"]["happyHours"+ weekDay +"StartMinutes"] = { "$lte": minutes }; 
match["$match"]["happyHours"+ weekDay +"EndHour"] = { "$gte": minutes }; 
match["$match"]["happyHours"+ weekDay +"EndMinutes"] = { "$gte": minutes }; 
pipeline.push(project); 
pipeline.push(match); 

db.hotels.aggregate(pipeline); 

---

あなたにこのことを示すだろうprintjson(pipeline)でそれを実行する前に、パイプラインを印刷：その後の$matchパイプラインで$projectステップとクエリでdate aggregation operatorsを利用し、次の集約パイプラインを考えてみましょう：

[ 
    { 
     "$unwind" : "$happyHours.mon" 
    }, 
    { 
     "$unwind" : "$happyHours.tue" 
    }, 
    { 
     "$unwind" : "$happyHours.wed" 
    }, 
    { 
     "$unwind" : "$happyHours.thur" 
    }, 
    { 
     "$unwind" : "$happyHours.fri" 
    }, 
    { 
     "$unwind" : "$happyHours.sat" 
    }, 
    { 
     "$unwind" : "$happyHours.sun" 
    }, 
    { 
     "$project" : { 
      "otherfields" : 1, 
      "happyHours" : 1, 
      "happyHoursMonStartHour" : { 
       "$hour" : "$happyHours.mon.startTime" 
      }, 
      "happyHoursMonStartMinutes" : { 
       "$minute" : "$happyHours.mon.startTime" 
      }, 
      "happyHoursMonEndHour" : { 
       "$hour" : "$happyHours.mon.endTime" 
      }, 
      "happyHoursMonEndMinutes" : { 
       "$minute" : "$happyHours.mon.endTime" 
      }, 
      "happyHoursTueStartHour" : { 
       "$hour" : "$happyHours.tue.startTime" 
      }, 
      "happyHoursTueStartMinutes" : { 
       "$minute" : "$happyHours.tue.startTime" 
      }, 
      "happyHoursTueEndHour" : { 
       "$hour" : "$happyHours.tue.endTime" 
      }, 
      "happyHoursTueEndMinutes" : { 
       "$minute" : "$happyHours.tue.endTime" 
      }, 
      "happyHoursWedStartHour" : { 
       "$hour" : "$happyHours.wed.startTime" 
      }, 
      "happyHoursWedStartMinutes" : { 
       "$minute" : "$happyHours.wed.startTime" 
      }, 
      "happyHoursWedEndHour" : { 
       "$hour" : "$happyHours.wed.endTime" 
      }, 
      "happyHoursWedEndMinutes" : { 
       "$minute" : "$happyHours.wed.endTime" 
      }, 
      "happyHoursThuStartHour" : { 
       "$hour" : "$happyHours.thu.startTime" 
      }, 
      "happyHoursThuStartMinutes" : { 
       "$minute" : "$happyHours.thur.startTime" 
      }, 
      "happyHoursThuEndHour" : { 
       "$hour" : "$happyHours.thu.endTime" 
      }, 
      "happyHoursThuEndMinutes" : { 
       "$minute" : "$happyHours.thu.endTime" 
      }, 
      "happyHoursFriStartHour" : { 
       "$hour" : "$happyHours.fri.startTime" 
      }, 
      "happyHoursFriStartMinutes" : { 
       "$minute" : "$happyHours.fri.startTime" 
      }, 
      "happyHoursFriEndHour" : { 
       "$hour" : "$happyHours.fri.endTime" 
      }, 
      "happyHoursFriEndMinutes" : { 
       "$minute" : "$happyHours.fri.endTime" 
      }, 
      "happyHoursSatStartHour" : { 
       "$hour" : "$happyHours.sat.startTime" 
      }, 
      "happyHoursSatStartMinutes" : { 
       "$minute" : "$happyHours.sat.startTime" 
      }, 
      "happyHoursSatEndHour" : { 
       "$hour" : "$happyHours.sat.endTime" 
      }, 
      "happyHoursSatEndMinutes" : { 
       "$minute" : "$happyHours.sat.endTime" 
      }, 
      "happyHoursSunStartHour" : { 
       "$hour" : "$happyHours.sun.startTime" 
      }, 
      "happyHoursSunStartMinutes" : { 
       "$minute" : "$happyHours.sun.startTime" 
      }, 
      "happyHoursSunEndHour" : { 
       "$hour" : "$happyHours.sun.endTime" 
      }, 
      "happyHoursSunEndMinutes" : { 
       "$minute" : "$happyHours.sun.endTime" 
      } 
     } 
    }, 
    { 
     "$match" : { 
      "happyHoursThuStartHour" : { 
       "$lte" : 9 
      }, 
      "happyHoursThuStartMinutes" : { 
       "$lte" : 34 
      }, 
      "happyHoursThuEndHour" : { 
       "$gte" : 34 
      }, 
      "happyHoursThuEndMinutes" : { 
       "$gte" : 34 
      } 
     } 
    } 
]