Mongodb mongo聚合与$cond在嵌套查找时不与$eq一起工作
我在引用Mongodb mongo聚合与$cond在嵌套查找时不与$eq一起工作,mongodb,mongoose,mongodb-query,aggregation-framework,Mongodb,Mongoose,Mongodb Query,Aggregation Framework,我在引用$cond语句中的嵌套数组项时遇到问题 db.getCollection('bookings').aggregate([ { $lookup: { from: "listings", localField: "listingId", foreignField: "_id", as: "listing" } }, { $match: { $and: [ { l
$cond
语句中的嵌套数组项时遇到问题
db.getCollection('bookings').aggregate([
{
$lookup: {
from: "listings",
localField: "listingId",
foreignField: "_id",
as: "listing"
}
},
{
$match: {
$and: [
{
locationId: ObjectId("5c0f0c882fcf07fb08890c27")
},
{
$or: [
{
$and: [
{
state: "booked"
},
{
startDate: {
$lte: new Date()
}
},
{
startDate: {
$gte: ISODate("2019-12-18T07:00:00.000Z")
}
}
]
},
{
$and: [
{
listing: {
$elemMatch: {
inspectionStatus: "none"
}
}
},
{
endDate: {
$lte: new Date()
}
},
{
endDate: {
$gte: ISODate("2019-12-18T07:00:00.000Z")
}
},
{
state: {
$in: [
"active",
"returned"
]
}
}
]
},
{
$and: [
{
state: {
$ne: "cancelled"
}
},
{
$or: [
{
$and: [
{
startDate: {
$gte: ISODate("2019-12-20T07:00:00.993Z")
}
},
{
startDate: {
$lte: ISODate("2019-12-21T06:59:59.999Z")
}
}
]
},
{
$and: [
{
endDate: {
$gte: ISODate("2019-12-20T07:00:00.993Z")
}
},
{
endDate: {
$lte: ISODate("2019-12-21T06:59:59.999Z")
}
}
]
}
]
}
]
}
]
}
]
}
},
{
$addFields: {
isLate: {
$cond: [
{
$or: [
{
$and: [
{
$eq: [
"$listing.0.inspectionStatus",
"none"
]
},
{
$lte: [
"$endDate",
new Date()
]
},
{
$gte: [
"$endDate",
ISODate("2019-12-18T07:00:00.000Z")
]
},
{
$in: [
"$state",
[
"active",
"returned"
]
]
},
]
},
{
$and: [
{
$eq: [
"$state",
"booked"
]
},
{
$lte: [
"$startDate",
new Date()
]
},
{
$gte: [
"$startDate",
ISODate("2019-12-18T07:00:00.000Z")
]
}
]
}
]
},
true,
false
]
}
}
}
])
在上面的语句中,$cond
语句中的以下行根本不起作用:
$eq: [
"$listing.0.inspectionStatus",
"none"
]
我的问题是-我如何使上述工作?请注意,在查找之后,
列表
字段中始终只有一个数组项(其中的数组项不得超过一个)。我尝试过不同的变体,如$listing.$0.$inspectionStatus
——但似乎没有任何效果。我可以沿着搜索组和过滤器的轨道前进,但我觉得这太过分了,因为我总是想访问列表中的第一个也是唯一一个项目数组。请使用$in关键字而不是$cond关键字中的$eq关键字
db.demo1.aggregate([
{
$lookup: {
from: "demo2",
localField: "listingId",
foreignField: "_id",
as: "listing"
}
},
{
$match: {
$and: [
{
locationId: ObjectId("5c0f0c882fcf07fb08890c27")
},
{
$or: [
{
$and: [
{
state: "booked"
},
{
startDate: {
$lte: new Date()
}
},
{
startDate: {
$gte: ISODate("2019-12-18T07:00:00.000Z")
}
}
]
},
{
$and: [
{
listing: {
$elemMatch: {
inspectionStatus: "none"
}
}
},
{
endDate: {
$lte: new Date()
}
},
{
endDate: {
$gte: ISODate("2019-12-18T07:00:00.000Z")
}
},
{
state: {
$in: [
"active",
"returned"
]
}
}
]
},
{
$and: [
{
state: {
$ne: "cancelled"
}
},
{
$or: [
{
$and: [
{
startDate: {
$gte: ISODate("2019-12-20T07:00:00.993Z")
}
},
{
startDate: {
$lte: ISODate("2019-12-21T06:59:59.999Z")
}
}
]
},
{
$and: [
{
endDate: {
$gte: ISODate("2019-12-20T07:00:00.993Z")
}
},
{
endDate: {
$lte: ISODate("2019-12-21T06:59:59.999Z")
}
}
]
}
]
}
]
}
]
}
]
}
},
{
$addFields: {
isLate: {
$cond: [
{
$or: [
{
$and: [
{
$in: [
"none",
"$listing.inspectionStatus",
]
},
{
$lte: [
"$endDate",
new Date()
]
},
{
$gte: [
"$endDate",
ISODate("2019-12-18T07:00:00.000Z")
]
},
{
$in: [
"$state",
[
"active",
"returned"
]
]
},
]
},
{
$and: [
{
$eq: [
"$state",
"booked"
]
},
{
$lte: [
"$startDate",
new Date()
]
},
{
$gte: [
"$startDate",
ISODate("2019-12-18T07:00:00.000Z")
]
}
]
}
]
},
true,
false
]
}
}
}
])
请在@Mahesh output共享输入和输出数据:至于输入-请参阅输出-和列表
是列表
集合中的列表文档,其余的输出只是预订
集合中的文档请共享预订和列表好的-这里是列表:然后预订:请告诉listingId在ListingJSonTank中的键在哪里@Mahesh-这就做到了!请注意,如果确实需要在聚合表达式中引用数组的第零个成员,则语法为{$arrayElemAt:[“$array”,0]}
,对于其他有序元素也是如此。