I am new to mongodb where i want to fetch record that matches condition for u_id is equal to particular u_id. I am confusing where/what condition should be applied there for fetching that particular record.
connection.model.find( {'abc.sar.0.u_id': new ObjectID( '56e3e5b6fb33e53f119051f2' )} , function ( err, result ) { });
[
{
"_id": "56e15c49908fb5af0238f05c",
"abc": {
"sar": [
{
"u_id": "56e18c33909aa6f214e17dec",
"cd": null,
"_id": "56e18c33909aa6f214e17df0"
},
{
"u_id": "56e18c4a909aa6f214e17df1",
"cd": null,
"_id": "56e18c4a909aa6f214e17df5"
},
{
"u_id": "56e18f6a909aa6f214e17df6",
"cd": null,
"_id": "56e18f6a909aa6f214e17dfa"
},
{
"u_id": "56e3c477a8b75d720c73e5a7",
"cd": null,
"_id": "56e3c477a8b75d720c73e5ab"
},
{
"u_id": "56e3e5b6fb33e53f119051f2",
"cd": null,
"_id": "56e3e5b6fb33e53f119051f6"
},
{
"u_id": "56e3e60efb33e53f119051f7",
"cd": null,
"_id": "56e3e60efb33e53f119051fb"
},
{
"u_id": "56e3eaedc0e2dba711805f0e",
"cd": null,
"_id": "56e3eaedc0e2dba711805f12"
},
{
"u_id": "56e3eb85f81fe30d12507709",
"cd": null,
"_id": "56e3eb86f81fe30d1250770d"
}
]
}
}
]
You want to use $elemMatch .
connection.model.find({
'abc.sar' : {
$elemMatch : {'u_id': new ObjectID( '56e3e5b6fb33e53f119051f2' )}
}
});
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.