问题
Considering I have the following documents in a collection (ignoring the _id) :
[
{
"Id": "OP01",
"Sessions": [
{
"Id": "Session01",
"Conversations": [
{
"Id": "Conversation01",
"Messages": [
{
"Id": "Message01",
"Status": "read",
"Direction": "inbound"
},
{
"Id": "Message02",
"Status": "delivered",
"Direction": "internal"
},
{
"Id": "Message03",
"Status": "delivered",
"Direction": "inbound"
},
{
"Id": "Message04",
"Status": "sent",
"Direction": "outbound"
}
]
},
{
"Id": "Conversation02",
"Messages": [
{
"Id": "Message05",
"Status": "sent",
"Direction": "outbound"
}
]
}
]
},
{
"Id": "Session02",
"Conversations": [
{
"Id": "Conversation03",
"Messages": [
{
"Id": "Message06",
"Status": "read",
"Direction": "inbound"
},
{
"Id": "Message07",
"Status": "delivered",
"Direction": "internal"
}
]
},
{
"Id": "Conversation04",
"Messages": []
}
]
}
]
},
{
"Id": "OP02",
"Sessions": [
{
"Id": "Session03",
"Conversations": []
}
]
},
{
"Id": "OP03",
"Sessions": []
}
]
First query — aggregate (+$project)
I want to get the list of Messages grouped by their Conversations where:
Sessions.Id: "Session01"
and
Sessions.Conversations.Messages.Direction $in ["inbound", "outbound"]
and
Sessions.Conversations.Messages.Status $in ["sent", "delivered"]
The expected result is:
[
{
"Id": "Conversation01",
"Messages": [
{
"Id": "Message03",
"Status": "delivered",
"Direction": "inbound"
},
{
"Id": "Message04",
"Status": "sent",
"Direction": "outbound"
}
]
},
{
"Id": "Conversation02",
"Messages": [
{
"Id": "Message05",
"Status": "sent",
"Direction": "outbound"
}
]
}
]
A side note:
If on different documents (or on different Sessions) the Sessions.Id: "Session01" condition is verified ("Session01"is not an unique key), the document's Messages that match the other conditions should also be added.
The result output doesn't mention neither the document or Sessions levels.
Second query — update
I want to update the Sessions.Conversations.Messages.Status of all those messages (same condition as before) to "read".
The collection should have now the following documents:
Please note the changes on:
Sessions.Conversations.Messages.Id = "Message03"Sessions.Conversations.Messages.Id = "Message04"Sessions.Conversations.Messages.Id = "Message05"
at Sessions.Id = "Session01"
[
{
"Id": "OP01",
"Sessions": [
{
"Id": "Session01",
"Conversations": [
{
"Id": "Conversation01",
"Messages": [
{
"Id": "Message01",
"Status": "read",
"Direction": "inbound"
},
{
"Id": "Message02",
"Status": "delivered",
"Direction": "internal"
},
{
"Id": "Message03",
"Status": "read",
"Direction": "inbound"
},
{
"Id": "Message04",
"Status": "read",
"Direction": "outbound"
}
]
},
{
"Id": "Conversation02",
"Messages": [
{
"Id": "Message05",
"Status": "read",
"Direction": "outbound"
}
]
}
]
},
{
"Id": "Session02",
"Conversations": [
{
"Id": "Conversation03",
"Messages": [
{
"Id": "Message06",
"Status": "read",
"Direction": "inbound"
},
{
"Id": "Message07",
"Status": "delivered",
"Direction": "internal"
}
]
},
{
"Id": "Conversation04",
"Messages": []
}
]
}
]
},
{
"Id": "OP02",
"Sessions": [
{
"Id": "Session03",
"Conversations": []
}
]
},
{
"Id": "OP03",
"Sessions": []
}
]
How can I accomplish these results with an aggregate and update_one queries?
Here comes a visual explanation of both queries:
回答1:
I have written the aggregation query
db.session.aggregate([
{
$unwind:"$Sessions"
},
{
$unwind:"$Sessions.Conversations"
},
{
$unwind:"$Sessions.Conversations.Messages"
},
{
$match:{
"Sessions.Id" : "Session01",
"Sessions.Conversations.Messages.Direction":{
$in:[
"inbound", "outbound"
]
},
"Sessions.Conversations.Messages.Status":{
$in:[
"sent", "delivered"
]
}
}
},
{
$group:{
"_id":"$Sessions.Conversations.Id",
"Messages":{
$push:"$Sessions.Conversations.Messages"
}
}
}
]).pretty()
Output
{
"_id" : "Conversation02",
"Messages" : [
{
"Id" : "Message05",
"Status" : "sent",
"Direction" : "outbound"
}
]
}
{
"_id" : "Conversation01",
"Messages" : [
{
"Id" : "Message03",
"Status" : "delivered",
"Direction" : "inbound"
},
{
"Id" : "Message04",
"Status" : "sent",
"Direction" : "outbound"
}
]
}
Now to Update the document:
I have used the positional-filters
db.session.update(
{},
{
$set:{
"Sessions.$[session].Conversations.$[].Messages.$[message].Status":"read"
}
},
{
"arrayFilters": [{"session.Id":"Session01"},{ "message.Id": "Message05" }]
}
)
This will update the status as read for "session.Id":"Session01" and "message.Id": "Message05"
Hope this will help you. :)
UPDATE
db.session.update(
{},
{
$set:{
"Sessions.$[session].Conversations.$[].Messages.$[message].Status":"read"
}
},
{
"arrayFilters": [
{
"session.Id":"Session01"
},
{
"message.Direction": {
$in :[
"inbound",
"outbound"
]
},
"message.Status": {
$in :[
"sent",
"delivered"
]
}
}
]
}
)
来源：https://stackoverflow.com/questions/61157587/filter-nested-array-with-conditions-based-on-multi-level-object-values-and-updat