mongoengine get value on nested field [duplicate]
This question is an exact duplicate of:
mongoengine - Query on ListField of EmbeddedDocumentField
1 answer
I have following list in mongodb.
> db.article.find().pretty()
"_id" : ObjectId("5bebcfbb1b48d9974aac78ee"),
"no" : 40,
"subject" : "string",
"content" : "string",
"userid" : "string",
"comments" : [
"no" : 1,
"content" : "First content",
"userid" : "john",
"parent" : null,
"seq" : 12,
"created_at" : ISODate("2018-11-14T16:33:01.943Z")
,
"no" : 2,
"content" : "Second",
"userid" : "doe",
"parent" : null,
"seq" : 25,
"created_at" : ISODate("2018-11-14T16:33:01.943Z")
,
Now I'm using mongoengine in my python app.
If I want to get comments's no: 2's seq field value(in this code, it is 25), how can I manipulate my query?
I found the docs related it(http://docs.mongoengine.org/guide/querying.html) But I don't know it is exactly same with what I want.
Any solution here?
Thanks!
python mongodb mongoengine
asked Nov 14 '18 at 8:15
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Nov 14 '18 at 8:19
This question was marked as an exact duplicate of an existing question.
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This question is an exact duplicate of:
mongoengine - Query on ListField of EmbeddedDocumentField
1 answer
I have following list in mongodb.
> db.article.find().pretty()
"_id" : ObjectId("5bebcfbb1b48d9974aac78ee"),
"no" : 40,
"subject" : "string",
"content" : "string",
"userid" : "string",
"comments" : [
"no" : 1,
"content" : "First content",
"userid" : "john",
"parent" : null,
"seq" : 12,
"created_at" : ISODate("2018-11-14T16:33:01.943Z")
,
"no" : 2,
"content" : "Second",
"userid" : "doe",
"parent" : null,
"seq" : 25,
"created_at" : ISODate("2018-11-14T16:33:01.943Z")
,
Now I'm using mongoengine in my python app.
If I want to get comments's no: 2's seq field value(in this code, it is 25), how can I manipulate my query?
I found the docs related it(http://docs.mongoengine.org/guide/querying.html) But I don't know it is exactly same with what I want.
Any solution here?
Thanks!
python mongodb mongoengine
asked Nov 14 '18 at 8:15
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395212
marked as duplicate by Neil Lunn mongodb
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Nov 14 '18 at 8:19
This question was marked as an exact duplicate of an existing question.
add a comment |
This question is an exact duplicate of:
mongoengine - Query on ListField of EmbeddedDocumentField
1 answer
I have following list in mongodb.
> db.article.find().pretty()
"_id" : ObjectId("5bebcfbb1b48d9974aac78ee"),
"no" : 40,
"subject" : "string",
"content" : "string",
"userid" : "string",
"comments" : [
"no" : 1,
"content" : "First content",
"userid" : "john",
"parent" : null,
"seq" : 12,
"created_at" : ISODate("2018-11-14T16:33:01.943Z")
,
"no" : 2,
"content" : "Second",
"userid" : "doe",
"parent" : null,
"seq" : 25,
"created_at" : ISODate("2018-11-14T16:33:01.943Z")
,
Now I'm using mongoengine in my python app.
If I want to get comments's no: 2's seq field value(in this code, it is 25), how can I manipulate my query?
I found the docs related it(http://docs.mongoengine.org/guide/querying.html) But I don't know it is exactly same with what I want.
Any solution here?
Thanks!
python mongodb mongoengine
asked Nov 14 '18 at 8:15
HideHide
395212
This question is an exact duplicate of:
mongoengine - Query on ListField of EmbeddedDocumentField
1 answer
I have following list in mongodb.
> db.article.find().pretty()
"_id" : ObjectId("5bebcfbb1b48d9974aac78ee"),
"no" : 40,
"subject" : "string",
"content" : "string",
"userid" : "string",
"comments" : [
"no" : 1,
"content" : "First content",
"userid" : "john",
"parent" : null,
"seq" : 12,
"created_at" : ISODate("2018-11-14T16:33:01.943Z")
,
"no" : 2,
"content" : "Second",
"userid" : "doe",
"parent" : null,
"seq" : 25,
"created_at" : ISODate("2018-11-14T16:33:01.943Z")
,
Now I'm using mongoengine in my python app.
If I want to get comments's no: 2's seq field value(in this code, it is 25), how can I manipulate my query?
I found the docs related it(http://docs.mongoengine.org/guide/querying.html) But I don't know it is exactly same with what I want.
Any solution here?
Thanks!
This question is an exact duplicate of:
mongoengine - Query on ListField of EmbeddedDocumentField
1 answer
python mongodb mongoengine
python mongodb mongoengine
asked Nov 14 '18 at 8:15
HideHide
395212
asked Nov 14 '18 at 8:15
HideHide
395212
asked Nov 14 '18 at 8:15
HideHide
395212
asked Nov 14 '18 at 8:15
HideHide
395212
asked Nov 14 '18 at 8:15
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395212
395212
marked as duplicate by Neil Lunn mongodb
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This question was marked as an exact duplicate of an existing question.
marked as duplicate by Neil Lunn mongodb
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Nov 14 '18 at 8:19
This question was marked as an exact duplicate of an existing question.
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1 Answer
1
active
oldest
votes
db.getCollection('article').aggregate([
"$project":"comments.seq":1,"comments.no":1,"_id":0,
"$unwind":"$comments",
"$match":"comments.no":NumberInt(2),
"$project":"comments.seq":1
])
You can refer to it.
edited Nov 14 '18 at 8:37
Unheilig
12k165387
answered Nov 14 '18 at 8:32
KrloyKrloy
261
add a comment |
1 Answer
1
active
oldest
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
db.getCollection('article').aggregate([
"$project":"comments.seq":1,"comments.no":1,"_id":0,
"$unwind":"$comments",
"$match":"comments.no":NumberInt(2),
"$project":"comments.seq":1
])
You can refer to it.
edited Nov 14 '18 at 8:37
Unheilig
12k165387
answered Nov 14 '18 at 8:32
KrloyKrloy
261
add a comment |
db.getCollection('article').aggregate([
"$project":"comments.seq":1,"comments.no":1,"_id":0,
"$unwind":"$comments",
"$match":"comments.no":NumberInt(2),
"$project":"comments.seq":1
])
You can refer to it.
edited Nov 14 '18 at 8:37
Unheilig
12k165387
answered Nov 14 '18 at 8:32
KrloyKrloy
261
add a comment |
db.getCollection('article').aggregate([
"$project":"comments.seq":1,"comments.no":1,"_id":0,
"$unwind":"$comments",
"$match":"comments.no":NumberInt(2),
"$project":"comments.seq":1
])
You can refer to it.
edited Nov 14 '18 at 8:37
Unheilig
12k165387
answered Nov 14 '18 at 8:32
KrloyKrloy
261
db.getCollection('article').aggregate([
"$project":"comments.seq":1,"comments.no":1,"_id":0,
"$unwind":"$comments",
"$match":"comments.no":NumberInt(2),
"$project":"comments.seq":1
])
You can refer to it.
edited Nov 14 '18 at 8:37
Unheilig
12k165387
answered Nov 14 '18 at 8:32
KrloyKrloy
261
edited Nov 14 '18 at 8:37
Unheilig
12k165387
edited Nov 14 '18 at 8:37
Unheilig
12k165387
edited Nov 14 '18 at 8:37
Unheilig
12k165387
12k165387
answered Nov 14 '18 at 8:32
KrloyKrloy
261
answered Nov 14 '18 at 8:32
KrloyKrloy
261
answered Nov 14 '18 at 8:32
KrloyKrloy
261
261
add a comment |
add a comment |
