我从两个不同的集合中获取数据，我在这些数据上应用了$ lookup和$ match，效果很好。我想做的是查找的结果，我再次应用$ match，它具有某些条件。这是我要应用查找的 User 的集合。 用户集合：-
{
"_id": {
"$oid": "5b714631faaae220d7cc07cf"
},
"name": "abc",
"surname": "xyz",
"email": "abc@gmail.com",
"hotel_data": [
{
"location": {
"type": "Point",
"coordinates": [
30.7052881,
76.84470799999997
]
},
"_id": {
"$oid": "5b7fb8559849fd485dc47240"
},
"status": true,
"activityname": "Sparrow",
},
{
"location": {
"type": "Point",
"coordinates": [
30.733315,
76.779419
]
},
"_id": {
"$oid": "5b7f9ecb9960053dac7ce6f1"
},
"status": true,
"activityname": "Raj Hotel",
},
]
}
这是我的可用性集合，我将在其中应用$ lookup和$ match。
{
"_id": {
"$oid": "5b867766d63c4e2cdd5534d2"
},
"businessid": {
"$oid": "5b7fb8559849fd485dc47240"
},
"userid": {
"$oid": "5b714631faaae220d7cc07cf"
},
"hotel_filters": [
{
"_id": {
"$oid": "5b867766d63c4e2cdd5534d3"
},
"hotelservice": [
{
"service_id": "5b472fff25556c3f02a875aa",
"service_name": "Pool",
"_id": {
"$oid": "5b867767d63c4e2cdd5534d7"
}
},
{
"service_id": "5b472fdb25556c3f02a875a9",
"service_name": "AIR",
"_id": {
"$oid": "5b867767d63c4e2cdd5534d8"
}
}
],
"location_type": [
{
"locationtype_id": "5b18f4d08c63f42019763b12",
"locationtype_name": "Scenic View",
"_id": {
"$oid": "5b867767d63c4e2cdd5534d5"
}
},
{
"locationtype_id": "5b18f4e38c63f42019763b13",
"locationtype_name": "Central",
"_id": {
"$oid": "5b867767d63c4e2cdd5534d6"
}
}
],
"hotel_type": [
{
"hoteltype_id": "5b081452edefe23318834a28",
"hoteltype_name": "3 Star",
"_id": {
"$oid": "5b867767d63c4e2cdd5534d4"
}
}
]
}
]
}
我想做的是-在$ lookup之后，我只想要那些将要传递的具有“ hotelservice.service_id”和“ location_type.locationtype_id”的可用性数据。并且我通过对此查询应用尝试了此问题（在此查询中，我仅应用了“ hotelservice.service_id”，但稍后我也想在$和“ location_type.locationtype_id”上应用查询。）
User.aggregate([
{
$match:{
"hotel_data.location": {
"$geoWithin": {
"$centerSphere": [
[30.7052881, 76.84470799999997], 50/ 6371
]
}
}
}
},{
"$unwind": "$hotel_data"
},
{
$match:{
"hotel_data.location": {
"$geoWithin": {
"$centerSphere": [
[30.7052881, 76.84470799999997], 50/ 6371
]
}
}
}
},
{
$lookup: {
from: "availabilities",
localField: "hotel_data._id",
foreignField: "businessid",
as: "availabilitiesdata"
}
},
{$match:{$and: [{"availabilitiesdata.hotel_filters.hotelservice.service_id":{$in:[5b472fb725556c3f02a875a8]}}]}}
], function(err, data) {
if (err) {
return res.send({data: err, status: false, msg:"No Hotel Found" });
}else{
return res.send({status: true, msg:"Hotel Found", data:data });
}
});
此查询给我的结果如下。
{
"status": true,
"msg": "Hotel Found",
"data": [
{
"_id": "5b714631faaae220d7cc07cf",
"name": "abc",
"surname": "xyz",
"email": "abc@gmail.com",
"hotel_data": {
"location": {
"type": "Point",
"coordinates": [
30.7052881,
76.84470799999997
]
},
"_id": "5b7fb8559849fd485dc47240",
"status": true,
"activityname": "Sparrow",
},
"availabilitiesdata": [
{
"_id": "5b864fe68ab0b71f4f28021e",
"businessid": "5b7fb8559849fd485dc47240",
"userid": "5b714631faaae220d7cc07cf",
"hotel_filters": [
{
"_id": "5b864fe78ab0b71f4f28021f",
"hotelservice": [
{
"service_id": "5b472fb725556c3f02a875a8",
"service_name": "Parking",
"_id": "5b864fe78ab0b71f4f280223"
},
{
"service_id": "5b472fff25556c3f02a875aa",
"service_name": "Pool",
"_id": "5b864fe78ab0b71f4f280224"
}
],
"location_type": [
{
"locationtype_id": "5b18f4798c63f42019763b11",
"locationtype_name": "Quiet",
"_id": "5b864fe78ab0b71f4f280221"
},
{
"locationtype_id": "5b18f4e38c63f42019763b13",
"locationtype_name": "Central",
"_id": "5b864fe78ab0b71f4f280222"
}
],
"hotel_type": [
{
"hoteltype_id": "5b0813e2edefe23318834a27",
"hoteltype_name": "5 Star",
"_id": "5b864fe78ab0b71f4f280220"
}
]
}
]
},
{
"_id": "5b867766d63c4e2cdd5534d2",
"businessid": "5b7fb8559849fd485dc47240",
"userid": "5b714631faaae220d7cc07cf",
"hotel_filters": [
{
"_id": "5b867766d63c4e2cdd5534d3",
"hotelservice": [
{
"service_id": "5b472fff25556c3f02a875aa",
"service_name": "Pool",
"_id": "5b867767d63c4e2cdd5534d7"
},
{
"service_id": "5b472fdb25556c3f02a875a9",
"service_name": "AIR",
"_id": "5b867767d63c4e2cdd5534d8"
}
],
"location_type": [
{
"locationtype_id": "5b18f4d08c63f42019763b12",
"locationtype_name": "Scenic View",
"_id": "5b867767d63c4e2cdd5534d5"
},
{
"locationtype_id": "5b18f4e38c63f42019763b13",
"locationtype_name": "Central",
"_id": "5b867767d63c4e2cdd5534d6"
}
],
"hotel_type": [
{
"hoteltype_id": "5b081452edefe23318834a28",
"hoteltype_name": "3 Star",
"_id": "5b867767d63c4e2cdd5534d4"
}
]
}
]
}
]
}
]}
但是我想要的就是这样。
{
"status": true,
"msg": "Hotel Found",
"data": [
{
"_id": "5b714631faaae220d7cc07cf",
"name": "abc",
"surname": "xyz",
"email": "abc@gmail.com",
"hotel_data": {
"location": {
"type": "Point",
"coordinates": [
30.7052881,
76.84470799999997
]
},
"_id": "5b7fb8559849fd485dc47240",
"status": true,
"activityname": "Sparrow",
},
"availabilitiesdata": [
{
"_id": "5b864fe68ab0b71f4f28021e",
"businessid": "5b7fb8559849fd485dc47240",
"userid": "5b714631faaae220d7cc07cf",
"hotel_filters": [
{
"_id": "5b864fe78ab0b71f4f28021f",
"hotelservice": [
{
"service_id": "5b472fb725556c3f02a875a8",
"service_name": "Parking",
"_id": "5b864fe78ab0b71f4f280223"
},
{
"service_id": "5b472fff25556c3f02a875aa",
"service_name": "Pool",
"_id": "5b864fe78ab0b71f4f280224"
}
],
"location_type": [
{
"locationtype_id": "5b18f4798c63f42019763b11",
"locationtype_name": "Quiet",
"_id": "5b864fe78ab0b71f4f280221"
},
{
"locationtype_id": "5b18f4e38c63f42019763b13",
"locationtype_name": "Central",
"_id": "5b864fe78ab0b71f4f280222"
}
],
"hotel_type": [
{
"hoteltype_id": "5b0813e2edefe23318834a27",
"hoteltype_name": "5 Star",
"_id": "5b864fe78ab0b71f4f280220"
}
]
}
]
}
]
}
]}
我只希望那些与$ lookup可用性数据上的条件匹配的可用性。有人可以帮我吗？
答案 0 :(得分：1)
您可以使用$lookup管道变体将$match应用于3.6中的联接集合中
类似于（用下面的查找管道替换$lookup和$match阶段）
{"$lookup":{
"from":"availabilities",
"let":{"hotel_data_id":"$hotel_data._id"},
"pipeline":[
{"$match":{
"hotel_filters.hotelservice.service_id":{"$in":["5b472fb725556c3f02a875a8"]},
"hotel_filters.location_type.locationtype_id":{"$in":["5b18f4798c63f42019763b11"]},
"$expr":{"$eq":["$$hotel_data_id","$businessid"]}
}}
],
"as":"availabilitiesdata"
}}