JasperReports MongoDB Query How to access subdocument? - mongodb

Question

We have a document stored in MongoDB which looks like this:
{
"id" : 1,
"name" : "demo-name",
"lastModified" : ISODate("2015-01-07T07:19:35Z"),
"snapshot" : {
"rows" : [
{
"quantity" : 100,
"rate" : 32,
"description" : "22MM SHROUDED PBA RED",
"productCatlgNo" : "3MA40 00 AA0"
},
{
"quantity" : 125,
"rate" : 32,
"description" : "22MM SHROUDED PBA BLACK",
"productCatlgNo" : "3MA40 01 AA0"
}
]
}
}
I am trying to access this document and read only the data stored in the snapshot.rows in JasperStudio report designer using the following query:
{
'collectionName' : 'views.abcdefghi',
'findQuery' : {
'name': 'demo-name'
},
'findFields':{
'snapshot.rows': 1
}
}
But the output contains only snapshot.rows whereas I want the inner details of the documents present in the rows.
How should I go about it?

Answer 1

This could be your answer (based on this link)
}
runCommand:
{
aggregate : 'views.abcdefghi',
pipeline :
[
{$match : {"name" : "demo-name"}},
{$project : {"rows" : "$snapshot.rows" }},
]
}
}
after running the command (on sample document) db.test.aggregate([ {$project : {"rows" : "$snapshot.rows"}} ]).result in mongo shell I had this result (just ids and rows):
{
"0" : {
"_id" : ObjectId("54b9017ec283f0c25c9cbf5e"),
"rows" : [
{
"quantity" : 100,
"rate" : 32,
"description" : "22MM SHROUDED PBA RED",
"productCatlgNo" : "3MA40 00 AA0"
},
{
"quantity" : 125,
"rate" : 32,
"description" : "22MM SHROUDED PBA BLACK",
"productCatlgNo" : "3MA40 01 AA0"
}
]
}
}