我有以下查询，我想要的是拥有一组自定义组字段名称和字段值。
db.getCollection('mycollection').aggregate([
{"$match":{
"expireDate":{"$gte":"2018-02-06T00:00:00.000Z"},
"publishDate":{"$lte":"2018-02-06T00:00:00.000Z"},
"isPublished":true,"isDrafted":false,
"deletedAt":{"$eq":null},"deleted":false
}},
{"$group":{
"twentyFourHourAgo":{
"$sum":{
"$cond":[
{"$gt":["$publishDate","2018-02-04T08:48:16.892Z"]},1,0
]
}
},
"fortyEightHourAgo":{
"$sum":{
"$cond":[
{"$gt":["$publishDate","2018-02-01T08:48:16.892Z"]},1,0
]
}
},
"thirtyDaysAgo":{
"$sum":{
"$cond":[
{"$gt":["$publishDate","2017-12-31T08:48:16.892Z"]},1,0
]
}
},
"_id":{
"position":{"$ifNull":["$position","Unknown"]},
"workType":{"$ifNull":["$workType","Unknown"]},
"functionalArea":{"$ifNull":["$functionalArea","Unknown"]},
"minimumEducation":{"$ifNull":["$minimumEducation","Unknown"]},
"gender":{"$ifNull":["$gender","Unknown"]},
"contractType":{"$ifNull":["$contractType","Unknown"]},
"locations":{"$ifNull":["$locations","Unknown"]},
"requiredLanguages":{"$ifNull":["$requiredLanguages","Unknown"]},
"company":{"$ifNull":["$company.name","Unknown"]}},"count":{"$sum":1}
}
},
{"$group":{
"_id":null,
"twentyFourHourAgo":{
"$sum":"twentyFourHourAgo"
},
"fortyEightHourAgo":{
"$sum":"$fortyEightHourAgo"
},
"thirtyDaysAgo":{
"$sum":"$thirtyDaysAgo"
},
"position":{"$addToSet":{"Name":"$_id.position","Count":"$count"}},
"workType":{"$addToSet":{"Name":"$_id.workType","Count":"$count"}},
"functionalArea":{
"$addToSet":{"Name":"$_id.functionalArea","Count":"$count"}
},
"minimumEducation":{
"$addToSet":{"Name":"$_id.minimumEducation","Count":"$count"}
},
"gender":{"$addToSet":{"Name":"$_id.gender","Count":"$count"}},"contractType":{"$addToSet":{"Name":"$_id.contractType","Count":"$count"}},"locations":{"$addToSet":{"Name":"$_id.locations","Count":"$count"}},"requiredLanguages":{"$addToSet":{"Name":"$_id.requiredLanguages","Count":"$count"}},"company":{"$addToSet":{"Name":"$_id.company","Count":"$count"}}}}]
)
我在集合架构中的文档就像：
/* 1 */
{
"_id" : ObjectId("59e4540bf14f1607b90ffb81"),
"vacancyNumber" : "1",
"position" : "Software Tester",
"publishDate" : ISODate("2018-01-02T00:00:00.000Z"),
"expireDate" : ISODate("2018-05-29T00:00:00.000Z"),
"yearsOfExperience" : 40,
"minimumEducation" : "Doctorate",
"functionalArea" : "Education",
"company" : {
"id" : ObjectId("59e453fbf14f1607b90ffb80"),
"name" : "First Company",
"profile" : "profile",
"logo" : {
"container" : "companyFiles",
"name" : "abbbff58cd3fda2c59ab2ee620ea5aa0",
"mime" : ".png",
"size" : 5806
}
},
"durations" : {
"years" : 3,
"months" : 4
},
"probationPeriod" : {
"duration" : 34,
"unit" : "month"
},
"salary" : {
"minSalary" : 1000,
"maxSalary" : 2000,
"currency" : "USD",
"period" : "monthly",
"isNegotiable" : true
},
"locations" : [
"Germany",
"Itly",
"Iran"
],
"canApplyOnline" : true,
"skills" : [
"Skill1",
"Skill2",
"Skill3",
"Skill4"
],
"requiredLanguages" : [
"Arabic",
"English",
"Russian",
"Dari",
"French"
],
"keywords" : [
"Key1",
"Key2"
],
"deleted" : false,
"deletedAt" : null,
"isDrafted" : false,
"isPublished" : true,
"requiresTravel" : true,
"gender" : "male",
"nationalities" : [
"afghan"
],
"workType" : "Full Time",
"contractType" : "Permanent",
}
/* 2 */
{
"_id" : ObjectId("59f9402e05d04ebe5653d98f"),
"vacancyNumber" : "1",
"position" : "Software Engineer",
"publishDate" : ISODate("2018-01-03T00:00:00.000Z"),
"expireDate" : ISODate("2018-11-10T00:00:00.000Z"),
"yearsOfExperience" : 40,
"minimumEducation" : "Doctorate",
"functionalArea" : "Education",
"company" : {
"id" : ObjectId("59e453fbf14f1607b90ffb80"),
"name" : "First Company",
"profile" : "profile",
"logo" : {
"container" : "logo container",
"name" : "logo name",
"mime" : "logo mime type",
"size" : 1
}
},
"durations" : {
"years" : 3,
"months" : 4
},
"probationPeriod" : {
"duration" : 34,
"unit" : "month"
},
"salary" : {
"minSalary" : 1000,
"maxSalary" : 2000,
"currency" : "USD",
"period" : "monthly",
"isNegotiable" : true
},
"locations" : [
"Afghanistan",
"Itly",
"Iran"
],
"skills" : [
"Skill1",
"Another Skill"
],
"requiredLanguages" : [
"Arabic",
"English",
"Russian",
"Dari",
"French"
],
"keywords" : [
"Keyword",
"Key1"
],
"deleted" : false,
"deletedAt" : null,
"isDrafted" : false,
"isPublished" : true,
"gender" : "male",
"nationalities" : [
"afghan",
"iranian"
],
"workType" : "Full Time",
"contractType" : "Short-Term",
}
/* 3 */
{
"_id" : ObjectId("5a03235234f7504f13970abd"),
"vacancyNumber" : "1",
"position" : "Software Tester",
"publishDate" : ISODate("2017-10-10T00:00:00.000Z"),
"expireDate" : ISODate("2018-11-25T00:00:00.000Z"),
"yearsOfExperience" : 40,
"minimumEducation" : "Doctorate",
"functionalArea" : "IT Software",
"company" : {
"id" : ObjectId("59e453fbf14f1607b90ffb80"),
"name" : "My First Company",
"profile" : "profile",
"logo" : {
"container" : "logo container",
"name" : "logo name",
"mime" : "logo mime type",
"size" : 1
}
},
"durations" : {
"years" : 3,
"months" : 4
},
"probationPeriod" : {
"duration" : 34,
"unit" : "month"
},
"salary" : {
"minSalary" : 1000,
"maxSalary" : 2000,
"currency" : "USD",
"period" : "monthly",
"isNegotiable" : true
},
"locations" : [
"Germany",
"Itly",
"Iran"
],
"skills" : [
"Skill1",
"Test Skill"
],
"requiredLanguages" : [
"Arabic",
"English",
"Russian",
"Dari",
"French"
],
"keywords" : [
"Test Key",
"Keyword"
],
"deleted" : false,
"deletedAt" : null,
"isDrafted" : false,
"isPublished" : true,
"gender" : "female",
"nationalities" : [
"afghan"
],
"workType" : "Part Time",
"contractType" : "Permanent",
}
现在我想通过自定义表达式检查'twentyFourHourAgo，fortyEightHourAgo，thirtyDaysAgo'以及字段值functionalArea, position, locations, keywords, workType）来计算数据组。
我当前的查询结果是
{
"_id" : null,
"twentyFourHourAgo" : 0,
"fortyEightHourAgo" : 0.0,
"thirtyDaysAgo" : 2.0,
"position" : [
{
"Name" : "Software Engineer",
"Count" : 1.0
},
{
"Name" : "Software Tester",
"Count" : 1.0
}
],
"workType" : [
{
"Name" : "Full Time",
"Count" : 1.0
},
{
"Name" : "Part Time",
"Count" : 1.0
}
],
"functionalArea" : [
{
"Name" : "Education",
"Count" : 1.0
},
{
"Name" : "IT Software",
"Count" : 1.0
}
],
"minimumEducation" : [
{
"Name" : "Doctorate",
"Count" : 1.0
}
],
"gender" : [
{
"Name" : "male",
"Count" : 1.0
},
{
"Name" : "female",
"Count" : 1.0
}
],
"contractType" : [
{
"Name" : "Short-Term",
"Count" : 1.0
},
{
"Name" : "Permanent",
"Count" : 1.0
}
],
"locations" : [
{
"Name" : [
"Afghanistan",
"Itly",
"Iran"
],
"Count" : 1.0
},
{
"Name" : [
"Germany",
"Itly",
"Iran"
],
"Count" : 1.0
}
],
"requiredLanguages" : [
{
"Name" : [
"Arabic",
"English",
"Russian",
"Dari",
"French"
],
"Count" : 1.0
}
],
"company" : [
{
"Name" : "First Company",
"Count" : 1.0
},
{
"Name" : "My First Company",
"Count" : 1.0
}
]
}
如您所见，我有三个具有以下属性的文档：
Software Tester，但查询返回1 Software Tester（这意味着如果我有多个文档在特定列中有一些共同的值，它们的计数结果是错误的）。其他字段的contractType，workType等存在同样的问题......'。在locations等数组类型字段中，我的第一个文档在Germany, Italy, Iran数组中有locations个值，我的第二个文档有Afghanistan, Italy, Iran，我的第三个文档文件有Germany, Italy, Iran。但查询结果如下：
"locations" : [
{
"Name" : [
"Afghanistan",
"Itly",
"Iran"
],
"Count" : 1.0
},
{
"Name" : [
"Germany",
"Itly",
"Iran"
],
"Count" : 1.0
}
],
这应该是：Germany => 2, Italy,Iran => 3, and Afghanistan => 1
其他数组类型字段也存在同样的问题。
答案 0 :(得分：1)
这可以告诉你你的要求：
db.getCollection('foo').aggregate([
{"$match":{
"expireDate":{"$gte": ISODate("2018-01-02T00:00:00.000Z")},
"publishDate":{"$lte": ISODate("2018-05-29T00:00:00.000Z")},
"isPublished":true,"isDrafted":false,
"deletedAt":{"$eq":null},
"deleted":false
}},
{"$group":{
"twentyFourHourAgo":{
"$sum":{
"$cond":[
{"$gte":["$publishDate", ISODate("2018-01-02T00:00:00.000Z")]},1,0
]
}
},
"fortyEightHourAgo":{
"$sum":{
"$cond":[
{"$gte":["$publishDate", ISODate("2018-01-02T00:00:00.000Z")]},1,0
]
}
},
"thirtyDaysAgo":{
"$sum":{
"$cond":[
{"$gte":["$publishDate", ISODate("2018-01-02T00:00:00.000Z")]},1,0
]
}
},
"_id":{
"$ifNull":["$functionalArea","Unknown"]
},
/* Changes start from here */
"count" : { "$sum" : 1 } } },
{ "$group" : {
"_id" : "null", "fortyEightHourAgo" : { "$sum" : "$fortyEightHourAgo"},
"thirtyDaysAgo" : { "$sum" : "$thirtyDaysAgo"},
"twentyFourHourAgo" : { "$sum" : "$twentyFourHourAgo"},
"functionalArea" : { "$addToSet" : { "Name": "$_id", "Count" : "$count" } } }}
])
输出：
{
"_id" : null,
"fortyEightHourAgo" : 3.0,
"thirtyDaysAgo" : 3.0,
"twentyFourHourAgo" : 3.0,
"functionalArea" : [
{
"Name" : "Education",
"Count" : 1.0
},
{
"Name" : "IT Software",
"Count" : 2.0
}
]
}