MongoDb query to access array json - json

Question

EDIT:
INPUT : nodes DB is
db.nodes.insert([
{ "ACTIVE" : 1,
"GEOLOCATION": {
"GEO_CODE": [],
"ACTIVE_GEOLOCATION": false
},
"META": {
"CATEGORY": "levis",
"DESCRIPTION": "dsad",
"PRIVACY": "PUBLIC",
"TEMPLATE_NAME": "B",
"TEMPLATE_GROUP": "Product",
"KEYWORDS": [
"sda"
],
"CREATEDBY": "",
"SUBCATEGORY": "Blue",
"PRODUCT_TEMPLATE_TYPE": "Consumable",
"UOM": "",
"TEMPLATE_SUBGROUP": ""
},
"VARIENTS": [
{
"COMMENT": "Demo",
"INDEX": 0,
"NAME": "Brand",
"IS_PARENT": false,
"DATATYPE": "Text",
"ACCESS": "PUBLIC",
"PARENT_VARIENT": "Parem",
"TYPE": "PERMANENT"
},
{
"COMMENT": "Demo",
"INDEX": 0,
"NAME": "Account",
"IS_PARENT": false,
"DATATYPE": "Text",
"ACCESS": "PUBLIC",
"PARENT_VARIENT": "Parem",
"TYPE": "PERMANENT"
},
{
"COMMENT": "Demo",
"INDEX": 0,
"NAME": "Price",
"IS_PARENT": false,
"DATATYPE": "Text",
"ACCESS": "PUBLIC",
"PARENT_VARIENT": "Parem",
"TYPE": "PERMANENT"
},
]
}
])
Input:
if (Meteor.isServer) {
var nodeDB = new Meteor.Collection('nodes');
Meteor.startup(function () {
// code to run on server at startup
});
var p1=nodeDB.find({"ACTIVE" : 1, "VARIENTS.ACCESS" : "PUBLIC"}, { "VARIENTS.NAME": 1, _id : 0 });
var p2=p1.fetch();
var arr1=[];
var arr2=[];
for (i=0;i <p2.length;i++)
{
//console.log(p2[i].VARIENTS);
arr1[i]=p2[i].VARIENTS;
}
var dict=(arr1[1]);
// console.log(x.length);
console.log(arr1.NAME);
Meteor.startup(function () {
// code to run on server at startup
});
}
Result:
[ [ { COMMENT: 'Demo',
I20150521-15:50:47.855(5.5)? INDEX: 0,
I20150521-15:50:47.856(5.5)? NAME: 'Brand',
I20150521-15:50:47.856(5.5)? IS_PARENT: false,
I20150521-15:50:47.856(5.5)? DATATYPE: 'Text',
I20150521-15:50:47.856(5.5)? ACCESS: 'PUBLIC',
I20150521-15:50:47.856(5.5)? PARENT_VARIENT: 'Parem',
I20150521-15:50:47.856(5.5)? TYPE: 'PERMANENT' },
I20150521-15:50:47.856(5.5)? { COMMENT: 'Demo',
I20150521-15:50:47.857(5.5)? INDEX: 0,
I20150521-15:50:47.857(5.5)? NAME: 'Account',
I20150521-15:50:47.857(5.5)? IS_PARENT: false,
I20150521-15:50:47.857(5.5)? DATATYPE: 'Text',
I20150521-15:50:47.857(5.5)? ACCESS: 'PUBLIC',
I20150521-15:50:47.857(5.5)? PARENT_VARIENT: 'Parem',
I20150521-15:50:47.857(5.5)? TYPE: 'PERMANENT' },
I20150521-15:50:47.857(5.5)? { COMMENT: 'Demo',
I20150521-15:50:47.858(5.5)? INDEX: 0,
I20150521-15:50:47.858(5.5)? NAME: 'Price',
I20150521-15:50:47.858(5.5)? IS_PARENT: false,
I20150521-15:50:47.858(5.5)? DATATYPE: 'Text',
I20150521-15:50:47.858(5.5)? ACCESS: 'PUBLIC',
I20150521-15:50:47.858(5.5)? PARENT_VARIENT: 'Parem',
I20150521-15:50:47.859(5.5)? TYPE: 'PERMANENT' } ] ]
Problem: Result required is only NAME parameters in an array.How the query should be modified?

Answer 1

Mongo Query:-
db.nodes.aggregate([
{"$group": {"_id": "$VARIENTS.NAME"}},
{"$project": {"_id": 0, "TEMPLATE_NAME": "$_id"}}
]);
Mongo Result :-
{
"result" : [
{
"TEMPLATE_NAME" : [
"Brand",
"Account",
"Price"
]
}
],
"ok" : 1
}