我有三个收藏品
会话：
{
"_id": ObjectId("599c34620ee315182cdc9272"),
"updated_at": ISODate("2017-08-22T13:40:50.331Z"),
"created_at": ISODate("2017-08-22T13:40:50.331Z"),
"user": ObjectId("595f8426645bf5f47366fb29"),
"person": ObjectId("599c34610ee315182cdc9270"),
"answer": [
ObjectId("599c34620ee315182cdc9271")
],
"__v":
}
答案：
{
"_id": ObjectId("599c34620ee315182cdc9271"),
"form": ObjectId("599585f37ee86133ec39f762"),
"data": [
{
"question": ObjectId("5995860f7ee86133ec39f763"),
"value": "felipe xd",
"other": ""
},
{
"question": ObjectId("599586217ee86133ec39f764"),
"value": "felipe@xd.com",
"other": ""
},
{
"question": ObjectId("599c21d15df1f5196cc06cd0"),
"value": 75,
"other": ""
},
{
"question": ObjectId("599c21fe5df1f5196cc06cd1"),
"value": true,
"other": ""
},
{
"question": ObjectId("599c23da5df1f5196cc06cd2"),
"option": [
"599c23da5df1f5196cc06cd3",
"599c23da5df1f5196cc06cd5"
],
"other": ""
},
{
"question": ObjectId("599c23fb5df1f5196cc06cd6"),
"value": "123123213",
"other": ""
}
]
}
形式：
{
"_id": ObjectId("599585f37ee86133ec39f762"),
"updated_at": ISODate("2017-08-17T12:02:59.751Z"),
"created_at": ISODate("2017-08-17T12:02:59.751Z"),
"title": "formulário de teste",
"key": "formulario_de_teste",
"type": "",
"description": "",
"welcomeMessage": "Hello my darling, this is a test! xD xD",
"thanksMessage": "Obrigado por testar =)",
"hoursToBegin": 10,
"subAction": ObjectId("5994336358197738ce575f1a"),
"deleted": false,
"questions": [ ],
"active": true,
"__v": 0
}
我想要实现的是使用其数组中的answer对象填充会话对象，然后使用其对象填充form，然后使用其填充data.question宾语。
我试图做的事情如下：
var query = [
// match the object
{ "$match": {"_id": ObjectId("599c34620ee315182cdc9272")}},
// unwind answer to have acces to its properties as a single item
{"$unwind": {"path":"$answer"}},
{ "$lookup": {
"from": "answers",
"localField": "answer",
"foreignField": "_id",
"as": "answer"
}},
// unwind the lookup result to have access to its form property
{"$unwind": {"path": "$answer"}},
{"$lookup": {
"from": "forms",
"localField": "answer.form",
"foreignField": "_id",
"as": "answer.form"
}
},
{"$unwind": {"path": "$answer.data"}},
{"$lookup": {
"from": "questions",
"localField": "answer.data.question",
"foreignField": "_id",
"as": "data"
}
},
{"$unwind": {"path": "$data"}},
{"$unwind": {"path": "$answer.form"}},
{"$group": {
"_id": "$_id",
"person": {"$first": "$person"},
"user": {"$first": "$user"},
"answer": {"$push": "$answer"},
"data": {"$push": "$data"}
}}
]
db.sessions.aggregate(query)
我想要实现的结构如下：
[
{
"_id": "599c34620ee315182cdc9272",
"updated_at": "2017-08-22T13:40:50.331Z",
"created_at": "2017-08-22T13:40:50.331Z",
"user": "595f8426645bf5f47366fb29",
"person": "599c34610ee315182cdc9270",
"__v": 0,
"answer": [
{
"_id": "599c34620ee315182cdc9271",
"form": {
"_id": "599585f37ee86133ec39f762",
"updated_at": "2017-08-17T12:02:59.751Z",
"created_at": "2017-08-17T12:02:59.751Z",
"title": "formulário de teste",
"key": "formulario_de_teste",
"type": "",
"description": "",
"welcomeMessage": "Hello my darling, this is a test! xD xD",
"thanksMessage": "Obrigado por testar =)",
"hoursToBegin": 10,
"subAction": "5994336358197738ce575f1a",
"__v": 0,
"deleted": false,
"questions": [],
"active": true,
"id": "599585f37ee86133ec39f762"
},
"data": [
{
"question": {
"_id": "5995860f7ee86133ec39f763",
"updated_at": "2017-08-22T12:21:11.874Z",
"created_at": "2017-08-17T12:03:27.687Z",
"title": "Seu nome para que a gente consiga testar",
"form": "599585f37ee86133ec39f762",
"type": "text",
"order": null,
"key": "seu_nome_para_que_a_gente_consiga_testar",
"help": "",
"required": false,
"description": "",
"subType": "name",
"__v": 0,
"deleted": false,
"condition": null,
"active": true,
"id": "5995860f7ee86133ec39f763"
},
"value": "felipe xd",
"other": "",
"option": null
},
{
"question": {
"_id": "599586217ee86133ec39f764",
"updated_at": "2017-08-22T12:21:17.574Z",
"created_at": "2017-08-17T12:03:45.630Z",
"title": "seu email pra gente te criar!",
"form": "599585f37ee86133ec39f762",
"type": "text",
"order": null,
"key": "seu_email_pra_gente_te_criar!",
"help": "",
"required": false,
"description": "",
"subType": "email",
"__v": 0,
"deleted": false,
"condition": null,
"active": true,
"id": "599586217ee86133ec39f764"
},
"value": "felipe@xd.com",
"other": "",
"option": null
},
{
"question": {
"_id": "599c21d15df1f5196cc06cd0",
"updated_at": "2017-08-22T12:24:56.934Z",
"created_at": "2017-08-22T12:21:37.567Z",
"title": "333",
"form": "599585f37ee86133ec39f762",
"type": "scale",
"order": null,
"key": "333",
"help": "",
"required": false,
"description": "",
"subType": "scroll",
"__v": 0,
"deleted": false,
"condition": null,
"scale": {
"scroll": {
"label": "123",
"min": 0,
"max": 100,
"step": 25,
"formater": "none"
}
},
"active": true,
"id": "599c21d15df1f5196cc06cd0"
},
"value": 75,
"other": "",
"option": null
},
{
"question": {
"_id": "599c21fe5df1f5196cc06cd1",
"updated_at": "2017-08-22T12:26:51.509Z",
"created_at": "2017-08-22T12:22:22.122Z",
"title": "4444",
"form": "599585f37ee86133ec39f762",
"type": "boolean",
"order": null,
"key": "4444",
"help": "",
"required": false,
"description": "",
"subType": "yesno",
"__v": 0,
"deleted": false,
"condition": {
"question": "599c21d15df1f5196cc06cd0",
"booleanValue": null,
"scaleValue": 75,
"multipleValue": []
},
"active": true,
"id": "599c21fe5df1f5196cc06cd1"
},
"value": true,
"other": "",
"option": null
},
{
"question": {
"_id": "599c23da5df1f5196cc06cd2",
"updated_at": "2017-08-22T12:30:18.622Z",
"created_at": "2017-08-22T12:30:18.622Z",
"title": "55555",
"form": "599585f37ee86133ec39f762",
"type": "multiple",
"order": null,
"key": "55555",
"help": "",
"required": false,
"description": "",
"subType": "check",
"__v": 0,
"deleted": false,
"condition": {
"question": "599c21fe5df1f5196cc06cd1",
"booleanValue": true,
"scaleValue": null,
"multipleValue": []
},
"active": true,
"id": "599c23da5df1f5196cc06cd2"
},
"other": "",
"option": [
{
"_id": "599c23da5df1f5196cc06cd3",
"title": "1111",
"order": null,
"question": "599c23da5df1f5196cc06cd2",
"key": "1111",
"description": "",
"help": "",
"deleted": false,
"active": true,
"id": "599c23da5df1f5196cc06cd3"
},
{
"_id": "599c23da5df1f5196cc06cd5",
"title": "33333",
"order": null,
"question": "599c23da5df1f5196cc06cd2",
"key": "33333",
"description": "",
"help": "",
"deleted": false,
"active": true,
"id": "599c23da5df1f5196cc06cd5"
}
]
},
{
"question": {
"_id": "599c23fb5df1f5196cc06cd6",
"updated_at": "2017-08-22T12:30:51.074Z",
"created_at": "2017-08-22T12:30:51.074Z",
"title": "66666",
"form": "599585f37ee86133ec39f762",
"type": "text",
"order": null,
"key": "66666",
"help": "",
"required": false,
"description": "",
"subType": "text",
"__v": 0,
"deleted": false,
"condition": {
"question": "599c23da5df1f5196cc06cd2",
"booleanValue": null,
"multipleValue": [
"599c23da5df1f5196cc06cd3",
"599c23da5df1f5196cc06cd5"
]
},
"active": true,
"id": "599c23fb5df1f5196cc06cd6"
},
"value": "123123213",
"other": "",
"option": []
}
],
"id": "599c34620ee315182cdc9271"
}
],
"id": "599c34620ee315182cdc9272"
}
]
我需要在MongoDB的聚合框架
的单个查询中完成