MongoEngine Aggregation - pivot array to object
I am working on following MongoEngine classes
class User(Document):
username = EmailField(primary_key=True)
name = StringField()
class Asset(Document):
users = ListField( ReferenceField("User") )
remote = MapField( DynamicField() )
Sample documents of the above classes are
User:
{
"_id" : "xyz@xyz.com",
"name" : "xyz"
}
Asset:
{
"_id" : ObjectId("5485asasansja"),
"users" : ["xyz@xyz.com", "abc@abc.com"],
"remote" : { "bytes" : 123,
"source" : "some source"
}
},
{
"_id" : ObjectId("5885asaskaia"),
"users" : ["pqr@xyz.com", "abc@abc.com"],
"remote" : { "bytes" : 345,
"source" : "another source"
}
}
I want to get results using pipeline like
{
"xyz@xyz.com" : {"some source": 45845, "another source": 5845},
"abc@abc.com" : {"some source": 584, "another source": 986}
}
bottom line, want to get the sum of bytes according to its source for each user.
I tried with
pipeline = [
{'$project':
{'remote.source': 1, 'remote.bytes': 1 }},
{'$unwind': '$users'},
{'$lookup': {
'from': 'user', 'localField': 'users', 'foreignField' : '_id', 'as':'user'
}},
{'$match': {'remote.source': {'$exists': True, '$ne': None}}},
{'$project': {'username': '$user.username'}},
{'$group':
{'username':'$username','source': '$remote.source', 'count': {'$sum': 1}, 'size': {'$sum': '$remote.bytes'}}}
]
for each in Asset.objects().aggregate(*pipeline):
print(each)
It does not return any result. Can anyone help?
mongodb mongodb-query aggregation-framework mongoengine
edited Nov 28 '18 at 20:58
Akrion
9,56011224
asked Nov 28 '18 at 18:45
chetan tambolichetan tamboli
779
add a comment |
I am working on following MongoEngine classes
class User(Document):
username = EmailField(primary_key=True)
name = StringField()
class Asset(Document):
users = ListField( ReferenceField("User") )
remote = MapField( DynamicField() )
Sample documents of the above classes are
User:
{
"_id" : "xyz@xyz.com",
"name" : "xyz"
}
Asset:
{
"_id" : ObjectId("5485asasansja"),
"users" : ["xyz@xyz.com", "abc@abc.com"],
"remote" : { "bytes" : 123,
"source" : "some source"
}
},
{
"_id" : ObjectId("5885asaskaia"),
"users" : ["pqr@xyz.com", "abc@abc.com"],
"remote" : { "bytes" : 345,
"source" : "another source"
}
}
I want to get results using pipeline like
{
"xyz@xyz.com" : {"some source": 45845, "another source": 5845},
"abc@abc.com" : {"some source": 584, "another source": 986}
}
bottom line, want to get the sum of bytes according to its source for each user.
I tried with
pipeline = [
{'$project':
{'remote.source': 1, 'remote.bytes': 1 }},
{'$unwind': '$users'},
{'$lookup': {
'from': 'user', 'localField': 'users', 'foreignField' : '_id', 'as':'user'
}},
{'$match': {'remote.source': {'$exists': True, '$ne': None}}},
{'$project': {'username': '$user.username'}},
{'$group':
{'username':'$username','source': '$remote.source', 'count': {'$sum': 1}, 'size': {'$sum': '$remote.bytes'}}}
]
for each in Asset.objects().aggregate(*pipeline):
print(each)
It does not return any result. Can anyone help?
mongodb mongodb-query aggregation-framework mongoengine
edited Nov 28 '18 at 20:58
Akrion
9,56011224
asked Nov 28 '18 at 18:45
chetan tambolichetan tamboli
779
add a comment |
I am working on following MongoEngine classes
class User(Document):
username = EmailField(primary_key=True)
name = StringField()
class Asset(Document):
users = ListField( ReferenceField("User") )
remote = MapField( DynamicField() )
Sample documents of the above classes are
User:
{
"_id" : "xyz@xyz.com",
"name" : "xyz"
}
Asset:
{
"_id" : ObjectId("5485asasansja"),
"users" : ["xyz@xyz.com", "abc@abc.com"],
"remote" : { "bytes" : 123,
"source" : "some source"
}
},
{
"_id" : ObjectId("5885asaskaia"),
"users" : ["pqr@xyz.com", "abc@abc.com"],
"remote" : { "bytes" : 345,
"source" : "another source"
}
}
I want to get results using pipeline like
{
"xyz@xyz.com" : {"some source": 45845, "another source": 5845},
"abc@abc.com" : {"some source": 584, "another source": 986}
}
bottom line, want to get the sum of bytes according to its source for each user.
I tried with
pipeline = [
{'$project':
{'remote.source': 1, 'remote.bytes': 1 }},
{'$unwind': '$users'},
{'$lookup': {
'from': 'user', 'localField': 'users', 'foreignField' : '_id', 'as':'user'
}},
{'$match': {'remote.source': {'$exists': True, '$ne': None}}},
{'$project': {'username': '$user.username'}},
{'$group':
{'username':'$username','source': '$remote.source', 'count': {'$sum': 1}, 'size': {'$sum': '$remote.bytes'}}}
]
for each in Asset.objects().aggregate(*pipeline):
print(each)
It does not return any result. Can anyone help?
mongodb mongodb-query aggregation-framework mongoengine
edited Nov 28 '18 at 20:58
Akrion
9,56011224
asked Nov 28 '18 at 18:45
chetan tambolichetan tamboli
779
I am working on following MongoEngine classes
class User(Document):
username = EmailField(primary_key=True)
name = StringField()
class Asset(Document):
users = ListField( ReferenceField("User") )
remote = MapField( DynamicField() )
Sample documents of the above classes are
User:
{
"_id" : "xyz@xyz.com",
"name" : "xyz"
}
Asset:
{
"_id" : ObjectId("5485asasansja"),
"users" : ["xyz@xyz.com", "abc@abc.com"],
"remote" : { "bytes" : 123,
"source" : "some source"
}
},
{
"_id" : ObjectId("5885asaskaia"),
"users" : ["pqr@xyz.com", "abc@abc.com"],
"remote" : { "bytes" : 345,
"source" : "another source"
}
}
I want to get results using pipeline like
{
"xyz@xyz.com" : {"some source": 45845, "another source": 5845},
"abc@abc.com" : {"some source": 584, "another source": 986}
}
bottom line, want to get the sum of bytes according to its source for each user.
I tried with
pipeline = [
{'$project':
{'remote.source': 1, 'remote.bytes': 1 }},
{'$unwind': '$users'},
{'$lookup': {
'from': 'user', 'localField': 'users', 'foreignField' : '_id', 'as':'user'
}},
{'$match': {'remote.source': {'$exists': True, '$ne': None}}},
{'$project': {'username': '$user.username'}},
{'$group':
{'username':'$username','source': '$remote.source', 'count': {'$sum': 1}, 'size': {'$sum': '$remote.bytes'}}}
]
for each in Asset.objects().aggregate(*pipeline):
print(each)
It does not return any result. Can anyone help?
mongodb mongodb-query aggregation-framework mongoengine
mongodb mongodb-query aggregation-framework mongoengine
edited Nov 28 '18 at 20:58
Akrion
9,56011224
asked Nov 28 '18 at 18:45
chetan tambolichetan tamboli
779
edited Nov 28 '18 at 20:58
Akrion
9,56011224
asked Nov 28 '18 at 18:45
chetan tambolichetan tamboli
779
edited Nov 28 '18 at 20:58
Akrion
9,56011224
edited Nov 28 '18 at 20:58
Akrion
9,56011224
edited Nov 28 '18 at 20:58
Akrion
9,56011224
9,56011224
asked Nov 28 '18 at 18:45
chetan tambolichetan tamboli
779
asked Nov 28 '18 at 18:45
chetan tambolichetan tamboli
779
asked Nov 28 '18 at 18:45
chetan tambolichetan tamboli
779
779
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
See if this would do it for you:
db.collection.aggregate([
{ $unwind: "$users" },
{
"$group": {
"_id": null,
"data": {
"$push": {
"k": "$users",
"v": "$remote"
}
}
}
},
{
"$replaceRoot": {
"newRoot": {
"$arrayToObject": "$data"
}
}
}
])
The idea is to $unwind the users then $group them via data which is a key/value array in order to use $arrayToObject to form the final output object you are after.
You can see it here working
answered Nov 28 '18 at 20:49
AkrionAkrion
9,56011224
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
See if this would do it for you:
db.collection.aggregate([
{ $unwind: "$users" },
{
"$group": {
"_id": null,
"data": {
"$push": {
"k": "$users",
"v": "$remote"
}
}
}
},
{
"$replaceRoot": {
"newRoot": {
"$arrayToObject": "$data"
}
}
}
])
The idea is to $unwind the users then $group them via data which is a key/value array in order to use $arrayToObject to form the final output object you are after.
You can see it here working
answered Nov 28 '18 at 20:49
AkrionAkrion
9,56011224
add a comment |
See if this would do it for you:
db.collection.aggregate([
{ $unwind: "$users" },
{
"$group": {
"_id": null,
"data": {
"$push": {
"k": "$users",
"v": "$remote"
}
}
}
},
{
"$replaceRoot": {
"newRoot": {
"$arrayToObject": "$data"
}
}
}
])
The idea is to $unwind the users then $group them via data which is a key/value array in order to use $arrayToObject to form the final output object you are after.
You can see it here working
answered Nov 28 '18 at 20:49
AkrionAkrion
9,56011224
add a comment |
See if this would do it for you:
db.collection.aggregate([
{ $unwind: "$users" },
{
"$group": {
"_id": null,
"data": {
"$push": {
"k": "$users",
"v": "$remote"
}
}
}
},
{
"$replaceRoot": {
"newRoot": {
"$arrayToObject": "$data"
}
}
}
])
The idea is to $unwind the users then $group them via data which is a key/value array in order to use $arrayToObject to form the final output object you are after.
You can see it here working
answered Nov 28 '18 at 20:49
AkrionAkrion
9,56011224
See if this would do it for you:
db.collection.aggregate([
{ $unwind: "$users" },
{
"$group": {
"_id": null,
"data": {
"$push": {
"k": "$users",
"v": "$remote"
}
}
}
},
{
"$replaceRoot": {
"newRoot": {
"$arrayToObject": "$data"
}
}
}
])
The idea is to $unwind the users then $group them via data which is a key/value array in order to use $arrayToObject to form the final output object you are after.
You can see it here working
answered Nov 28 '18 at 20:49
AkrionAkrion
9,56011224
answered Nov 28 '18 at 20:49
AkrionAkrion
9,56011224
answered Nov 28 '18 at 20:49
AkrionAkrion
9,56011224
answered Nov 28 '18 at 20:49
AkrionAkrion
9,56011224
9,56011224
add a comment |
add a comment |
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