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我有以下文檔：MongoDB的多維數組拼合聚集
{
"items" : [
[
{
"itemID" : "arSiPKXhqAXQ8MwMA",
"name" : "Item number 1",
"complexDrink" : false,
"real" : NumberInt(0),
"side" : NumberInt(0),
"projected" : NumberInt(56)
},
{
"itemID" : "xmuZT4u7o6YPQ87Bf",
"name" : "Item number 2",
"complexDrink" : false,
"real" : NumberInt(0),
"side" : NumberInt(0),
"projected" : NumberInt(55)
}
],
[
{
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"name" : "Item number 1",
"complexDrink" : false,
"real" : NumberInt(80),
"side" : NumberInt(147),
"projected" : NumberInt(68)
},
{
"itemID" : "jaQ3o6ba6dwNv38Bm",
"name" : "Item number 2",
"complexDrink" : false,
"real" : NumberInt(98),
"side" : NumberInt(138),
"projected" : NumberInt(88)
}
],
[
{
"itemID" : "ZPrSr5LZJt7mQP9KM",
"name" : "Item number 1",
"complexDrink" : false,
"real" : NumberInt(141),
"side" : NumberInt(138),
"projected" : NumberInt(70)
},
{
"itemID" : "qR5qsyzfbAgqcvA84",
"name" : "Item number 2",
"complexDrink" : false,
"real" : NumberInt(69),
"side" : NumberInt(148),
"projected" : NumberInt(99)
}
],
[
{
"itemID" : "XrTEua9rRgieGyDo4",
"name" : "Item number 1",
"complexDrink" : false,
"real" : NumberInt(0),
"side" : NumberInt(0),
"projected" : NumberInt(62)
},
{
"itemID" : "GT4d9kdNSn9AikjBF",
"name" : "Item number 2",
"complexDrink" : false,
"real" : NumberInt(0),
"side" : NumberInt(0),
"projected" : NumberInt(62)
}
],
[
{
"itemID" : "cPEN7fnt9CG3zAFES",
"name" : "Item number 1",
"complexDrink" : false,
"real" : NumberInt(0),
"side" : NumberInt(0),
"projected" : NumberInt(104)
},
{
"itemID" : "2z4KER4JR8iY3CAst",
"name" : "Item number 2",
"complexDrink" : false,
"real" : NumberInt(0),
"side" : NumberInt(0),
"projected" : NumberInt(57)
}
],
[
{
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"name" : "Item number 1",
"complexDrink" : false,
"real" : NumberInt(0),
"side" : NumberInt(0),
"projected" : NumberInt(78)
},
{
"itemID" : "4BpZPss5ueJHYg2g9",
"name" : "Item number 2",
"complexDrink" : false,
"real" : NumberInt(0),
"side" : NumberInt(0),
"projected" : NumberInt(108)
}
],
[
{
"itemID" : "abMCndutq2gMtMpC3",
"name" : "Item number 1",
"complexDrink" : false,
"real" : NumberInt(109),
"side" : NumberInt(50),
"projected" : NumberInt(103)
},
{
"itemID" : "sZTtYi8AMrXWRyHM2",
"name" : "Item number 2",
"complexDrink" : false,
"real" : NumberInt(128),
"side" : NumberInt(66),
"projected" : NumberInt(87)
}
],
[
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"name" : "Item number 1",
"complexDrink" : false,
"real" : NumberInt(125),
"side" : NumberInt(79),
"projected" : NumberInt(75)
},
{
"itemID" : "esmvcWMeNbZXzFjSg",
"name" : "Item number 2",
"complexDrink" : false,
"real" : NumberInt(98),
"side" : NumberInt(132),
"projected" : NumberInt(51)
}
],
[
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"name" : "Item number 1",
"complexDrink" : false,
"real" : NumberInt(67),
"side" : NumberInt(82),
"projected" : NumberInt(72)
},
{
"itemID" : "TpsaYTST536hm4BLx",
"name" : "Item number 2",
"complexDrink" : false,
"real" : NumberInt(148),
"side" : NumberInt(92),
"projected" : NumberInt(69)
}
],
[
{
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"name" : "Item number 1",
"complexDrink" : false,
"real" : NumberInt(0),
"side" : NumberInt(0),
"projected" : NumberInt(50)
},
{
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"name" : "Item number 2",
"complexDrink" : false,
"real" : NumberInt(0),
"side" : NumberInt(0),
"projected" : NumberInt(63)
}
],
[
{
"itemID" : "XAFpcujePnKHMq3et",
"name" : "Item number 1",
"complexDrink" : false,
"real" : NumberInt(124),
"side" : NumberInt(87),
"projected" : NumberInt(50)
},
{
"itemID" : "BLA2azuv2FboStGKo",
"name" : "Item number 2",
"complexDrink" : false,
"real" : NumberInt(122),
"side" : NumberInt(83),
"projected" : NumberInt(71)
}
],
[
{
"itemID" : "2urB3BRLjZWjaHrEp",
"name" : "Item number 1",
"complexDrink" : false,
"real" : NumberInt(0),
"side" : NumberInt(0),
"projected" : NumberInt(72)
},
{
"itemID" : "B5Nurs4CXmzQnQ9Zg",
"name" : "Item number 2",
"complexDrink" : false,
"real" : NumberInt(0),
"side" : NumberInt(0),
"projected" : NumberInt(78)
}
],
[
{
"itemID" : "itjB327N8drTZxKx9",
"name" : "Item number 1",
"complexDrink" : false,
"real" : NumberInt(0),
"side" : NumberInt(0),
"projected" : NumberInt(84)
},
{
"itemID" : "6YzDgcvkfoAf9nLpf",
"name" : "Item number 2",
"complexDrink" : false,
"real" : NumberInt(0),
"side" : NumberInt(0),
"projected" : NumberInt(107)
}
],
[
{
"itemID" : "AdhS2TuHj93eyQ8mC",
"name" : "Item number 1",
"complexDrink" : false,
"real" : NumberInt(0),
"side" : NumberInt(0),
"projected" : NumberInt(71)
},
{
"itemID" : "NSBbbKqioTCfC3yAp",
"name" : "Item number 2",
"complexDrink" : false,
"real" : NumberInt(0),
"side" : NumberInt(0),
"projected" : NumberInt(51)
}
],
[
{
"itemID" : "vZXifWuiDeTgJiR8z",
"name" : "Item number 1",
"complexDrink" : false,
"real" : NumberInt(0),
"side" : NumberInt(0),
"projected" : NumberInt(60)
},
{
"itemID" : "y5SLnS5qjKQWcNqC3",
"name" : "Item number 2",
"complexDrink" : false,
"real" : NumberInt(0),
"side" : NumberInt(0),
"projected" : NumberInt(73)
}
],
[
{
"itemID" : "K8i4FveNeDMknuHe2",
"name" : "Item number 1",
"complexDrink" : false,
"real" : NumberInt(95),
"side" : NumberInt(139),
"projected" : NumberInt(94)
},
{
"itemID" : "jfRqG7o6GvHxqR7XB",
"name" : "Item number 2",
"complexDrink" : false,
"real" : NumberInt(52),
"side" : NumberInt(67),
"projected" : NumberInt(62)
}
],
[
{
"itemID" : "AeWX8ycx8Kxx5fs9j",
"name" : "Item number 1",
"complexDrink" : false,
"real" : NumberInt(0),
"side" : NumberInt(0),
"projected" : NumberInt(58)
},
{
"itemID" : "zB4fvrkHtKuLqfFdT",
"name" : "Item number 2",
"complexDrink" : false,
"real" : NumberInt(0),
"side" : NumberInt(0),
"projected" : NumberInt(107)
}
],
[
{
"itemID" : "k4MAXcqv6M4CNbyqK",
"name" : "Item number 1",
"complexDrink" : false,
"real" : NumberInt(0),
"side" : NumberInt(0),
"projected" : NumberInt(53)
},
{
"itemID" : "sKtNyWfp8LQmFdDhg",
"name" : "Item number 2",
"complexDrink" : false,
"real" : NumberInt(0),
"side" : NumberInt(0),
"projected" : NumberInt(106)
}
],
[
{
"itemID" : "WxEmSxJzmiuiiZF6e",
"name" : "Item number 1",
"complexDrink" : false,
"real" : NumberInt(0),
"side" : NumberInt(0),
"projected" : NumberInt(63)
},
{
"itemID" : "DJdncCq5apwr8RZbg",
"name" : "Item number 2",
"complexDrink" : false,
"real" : NumberInt(0),
"side" : NumberInt(0),
"projected" : NumberInt(77)
}
],
[
{
"itemID" : "hRpGE9RBt8zKuGNWo",
"name" : "Item number 1",
"complexDrink" : false,
"real" : NumberInt(0),
"side" : NumberInt(0),
"projected" : NumberInt(89)
},
{
"itemID" : "5eYvckNjWL6QnnroF",
"name" : "Item number 2",
"complexDrink" : false,
"real" : NumberInt(0),
"side" : NumberInt(0),
"projected" : NumberInt(87)
}
],
[
{
"itemID" : "kCugbteCN3zYnpsQe",
"name" : "Item number 1",
"complexDrink" : false,
"real" : NumberInt(0),
"side" : NumberInt(0),
"projected" : NumberInt(72)
},
{
"itemID" : "cBmT5HHQSfGHsjxW4",
"name" : "Item number 2",
"complexDrink" : false,
"real" : NumberInt(0),
"side" : NumberInt(0),
"projected" : NumberInt(79)
}
],
[
{
"itemID" : "N7xzob86NNDtzti5W",
"name" : "Item number 1",
"complexDrink" : false,
"real" : NumberInt(0),
"side" : NumberInt(0),
"projected" : NumberInt(92)
},
{
"itemID" : "j4xrE2gaKdJYv2BuN",
"name" : "Item number 2",
"complexDrink" : false,
"real" : NumberInt(0),
"side" : NumberInt(0),
"projected" : NumberInt(102)
}
],
[
{
"itemID" : "jhnr5wNiRQFR2fCZy",
"name" : "Item number 1",
"complexDrink" : false,
"real" : NumberInt(0),
"side" : NumberInt(0),
"projected" : NumberInt(103)
},
{
"itemID" : "JYaJZhYcrFnzQAwQ2",
"name" : "Item number 2",
"complexDrink" : false,
"real" : NumberInt(0),
"side" : NumberInt(0),
"projected" : NumberInt(94)
}
],
[
{
"itemID" : "sc7pYWMhKfHZLydCC",
"name" : "Item number 1",
"complexDrink" : false,
"real" : NumberInt(0),
"side" : NumberInt(0),
"projected" : NumberInt(53)
},
{
"itemID" : "K9qTTmeWHPt8d7Zwy",
"name" : "Item number 2",
"complexDrink" : false,
"real" : NumberInt(0),
"side" : NumberInt(0),
"projected" : NumberInt(99)
}
]
],
}
我想返回所有的項目在1個陣列，而不使用$unwind。我必須在$project階段做到這一點。我會怎麼做？我試圖
db.getCollection.aggregate([
{
$match: {
registerID: { $in: [ObjectId("7e343dadb3ded2eb83db3bb0"), ObjectId("018039aab7a39d32b573ae43")] },
timestamp: {
$gte: ISODate('2017-01-10T00:00:00+01:00'),
$lte: ISODate('2017-01-10T23:59:59+01:00'),
}
}
},
{
$group: {
_id: '$registerID',
items: { $push: '$items' }
},
},
{
$project: {
'items': {
$map: {
input: '$items',
as: 'item',
in: '$$item'
}
},
},
},
{
$sort: {
timestamp: 1,
},
},
])