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How to extract data from Firebase realtime database JSON-export

I have a Firebase realtime-database export-json that has nested informations, that I would like to extract. The structure of the JSON looks like this:
{
"users" : {
"024w97mv8NftGFY8THfQIU6PhaJ3" : {
"email" : "xxx",
"id" : "024w97mv8NftGFY8THfQIU6PhaJ3",
"name" : "xxx",
"items" : {
"-LQL9n-r9BGdo3HJZ2sk" : {
"disliked" : true,
"id" : 396,
"name" : "Aaa"
},
"-LQL9oO63nH-QW2w6zz0" : {
"liked" : true,
"id" : 3674,
"name" : "Bbb"
}
}
},
"0ERLT5DLRvbZUnjlnM7Ow0qItpz2" : {
"email" : "zzz",
"id" : "0ERLT5DLRvbZUnjlnM7Ow0qItpz2",
"name" : "zzz",
"items" : {
"-LIZnriSVQMzqTsPFNYa" : {
"id" : 396,
"liked" : true,
"name" : "Aaa"
},
"-LIZnrzOuk4WyjqEiLG8" : {
"disliked" : true,
"id" : 4805,
"name" : "Ccc"
}
}
}
}
}
What I need to achieve is getting a list of all liked item-names, and ideally counting how often an item is liked.
Is there a simple tool or script to do that? Ruby or Javascript would be preferred. Thanks a lot!

You can parse your JSON data in ruby like below
result_hash = JSON.parse(result)
result_ary = result_hash["users"].collect do |k,v|
v["items"].values.select{|v1| v1["liked"] == true }
end
result_data = result_ary.flatten
result of parsing
=> [{"liked"=>true, "id"=>3674, "name"=>"Bbb"}, {"id"=>396, "liked"=>true, "name"=>"Aaa"}]
Now its very easy for getting your required result
result_data.collect{|x| x["name"] }
=> ["Bbb", "Aaa"]
result_data.count {|x| x["name"] == "Aaa"}
=> 1
result_data.count {|x| x["name"] == "Bbb"}
=> 1

How to remove multi nested object in javascript using id

Declaration of id
var id = 3;
I want to update this object
var obj = {"comments" : {
"commentedBy" : "test",
"date" : "",
"comment" : "Hello world",
"subComments" : {
"commentedBy" : "jaril 2",
"date" : "",
"comment" : "Hello world inside dark",
"subComments" : {
"commentedBy" : "jaril 3",
"date" : "",
"comment" : "wow working great",
"subComments" : {
"commentedBy" : "jaril 4",
"date" : "",
"comment" : "wow working great",
"commentId" : 4
},
"commentId" : 3
},
"commentId" : 2
},
"commentId" : 1
},
"dueDate" : "",
"createdDate" : "",
"lastUpdated" : "",
"checkList" : [],
"position" : 2,
"status" : "active"
}
}
Function is this
function deleteCommentId(comments){
if (comments.commentId == id)){
delete comments;
return comments;
}
if (comments.subComments) {
deleteCommentId(comments.subComments);
}
return comments;
}
Function Object is this
if(id == 1){
result[0].comments = {};
} else {
deleteCommentId(obj.comments);
}
console.log("final object==>", obj);
I want output like this
{"comments" : {
"commentedBy" : "test",
"date" : "",
"comment" : "Hello world",
"subComments" : {
"commentedBy" : "jaril 2",
"date" : "",
"comment" : "Hello world inside dark",
"commentId" : 2
},
"commentId" : 1
},
"dueDate" : "",
"createdDate" : "",
"lastUpdated" : "",
"checkList" : [],
"position" : 2,
"status" : "active"
}
}
Any help would be appreciated
Note: I want to remove nested subcomments object using id if I pass
id=3 then it should remove subcomment of 2, How can I remove subcomments of 2 if id = 3

The function below should do it.
(I removed the irrelevant parts or your object to make things a bit easier to read.)
var obj = {
"comments": {
"subComments": {
"subComments": {
"subComments": {
"commentId": 4
},
"commentId": 3
},
"commentId": 2
},
"commentId": 1
}
};
function deleteCommentId(comments, id) {
if (comments.subComments) {
if (comments.subComments.commentId === id) {
delete comments.subComments;
} else {
deleteCommentId(comments.subComments, id);
}
}
}
deleteCommentId(obj.comments, 3);
console.log(obj);

var id = 3;
var obj = {"comments":{"commentedBy":"test","date":"","comment":"Hello world","subComments":{"commentedBy":"jaril 2","date":"","comment":"Hello world inside dark","subComments":{"commentedBy":"jaril 3","date":"","comment":"wow working great","subComments":{"commentedBy":"jaril 4","date":"","comment":"wow working great","commentId":4},"commentId":3},"commentId":2},"commentId":1},"dueDate":"","createdDate":"","lastUpdated":"","checkList":[],"position":2,"status":"active"}
function deleteCommentId(comments, id) {
if (comments.subComments) {
if (comments.subComments.commentId === id) {
delete comments.subComments;
} else {
deleteCommentId(comments.subComments, id);
}
}
}
deleteCommentId(obj.comments, id);
console.log("final object==>",obj);
var expectedJSON = {"comments":{"commentedBy":"test","date":"","comment":"Hello world","subComments":{"commentedBy":"jaril 2","date":"","comment":"Hello world inside dark","commentId":2},"commentId":1},"dueDate":"","createdDate":"","lastUpdated":"","checkList":[],"position":2,"status":"active"}
console.log("Output match: ",JSON.stringify(obj) == JSON.stringify(expectedJSON));

How to update document in Mongodb collection with a field value from another collection

I have two collections
1) Floorplan_backup.
The structure of the document looks like :-
{
"_id" : ObjectId("5877e18a88db272b578572bd"),
"floorplans" : [
{
"name" : "Campus Center - Atrium",
"uuid" : NumberLong(3),
"cameras" : []
},
{
"name" : "Campus Center - Bridge ",
"uuid" : NumberLong(4),
"cameras" : []
},
{
"name" : "Campus Center - Top",
"uuid" : NumberLong(5),
"cameras" : []
},
{
"name" : "Performance Dining Hall",
"uuid" : NumberLong(6),
"cameras" : []
},
{
"name" : "Main Kitchen",
"uuid" : NumberLong(7),
"cameras" : []
},
{
"name" : "OrgChart - Board of Trustees",
"uuid" : NumberLong(8),
"cameras" : []
},
{
"name" : "OrgChart - Academic Affairs",
"uuid" : NumberLong(9),
"cameras" : []
},
{
"name" : "OrgChart - Admissions",
"uuid" : NumberLong(10),
"cameras" : []
},
{
"name" : "OrgChart - Athletics",
"uuid" : NumberLong(11),
"cameras" : []
},
{
"name" : "OrgChart - Financial",
"uuid" : NumberLong(14),
"cameras" : []
},
{
"name" : "OrgChart - HR",
"uuid" : NumberLong(15),
"cameras" : []
},
{
"name" : "OrgChart - Institutional",
"uuid" : NumberLong(16),
"cameras" : []
},
{
"name" : "OrgChart - IT",
"uuid" : NumberLong(17),
"cameras" : []
},
{
"name" : "OrgChart - Student Success",
"uuid" : NumberLong(20),
"cameras" : []
},
{
"name" : "OrgChart - Student Life",
"uuid" : NumberLong(21),
"cameras" : []
}
],
"userid" : "user-56cb3c4c0c953470865336",
"firstviewhost" : undefined
}
2) Floorplan . The structure of the document
{
"_id" : ObjectId("589025b03422cafc09913363"),
"userid" : "user-56cb3c4c0c953470865336",
"firstviewhost" : "dean.vizsafe.com"
}
I would like to update the firstviewhost in Floorpla_backup with the value "dean.vizsafe.com" by matching the userid of both the collections.
The javascript code used is :-
db.floorplan_backup.find().forEach(function (doc1) {
var doc2 = db.floorplan.find({ userid: doc1.userid }, { firstviewhost: 1 });
if (doc2 != null) {
doc1.firstviewhost = doc2.firstviewhost;
db.floorplan_backup.save(doc1);
}
});
But is is not giving me the desired resultset . Could you let me know what is wrong with this?

doc2 is an array. Use findOne to get an object.
db.floorplan_backup.find().forEach(function (doc1) {
var doc2 = db.floorplan.findOne({ userid: doc1.userid }, { firstviewhost: 1 });
if (doc2 != null) {
doc1.firstviewhost = doc2.firstviewhost;
db.floorplan_backup.save(doc1);
}
});

find returns you a cursor, instead use findOne.
db.floorplan_backup.find().forEach(function (doc1) {
var doc2 = db.floorplan.findOne({ userid: doc1.userid }, { firstviewhost: 1 });
if (doc2 != null) {
doc1.firstviewhost = doc2.firstviewhost;
db.floorplan_backup.save(doc1);
}
});

MongoDB .find() only ObjectId's embedded in an Array.

I am trying to get only the ObjectId's from One specific Document that is embedded in the projects Array.
Basically I am trying to make a database that will have users and each user will have there own projects.
Thank you !
db.users.find().pretty()
{
"_id" : ObjectId("5762c0cf2b9a78006373a684"),
"name" : "seq",
"pass" : "seq",
"projects" : [
{
"pid" : ObjectId("5762c0ba2b9a78006373a682"),
"name" : "aaa"
},
{
"pid" : ObjectId("5762c0ba2b9a78006373a683"),
"name" : "bbb"
}
]
}
{
"_id" : ObjectId("5762c28d2b9a78006373a687"),
"name" : "leq",
"pass" : "leq",
"projects" : [
{
"pid" : ObjectId("5762c2892b9a78006373a685"),
"name" : "ccc"
},
{
"pid" : ObjectId("5762c2892b9a78006373a686"),
"name" : "ddd"
}
]
}

let say we want two pids
{"pid" : ObjectId("5762c0ba2b9a78006373a682")} and
{"pid" : ObjectId("5762c2892b9a78006373a686"),}
and only inner documents
so required response should look like:
{
"_id" : ObjectId("5762c0ba2b9a78006373a682"),
"name" : "aaa"
},{
"_id" : ObjectId("5762c2892b9a78006373a686"),
"name" : "ddd"
}
Aggregation framework can manipulate documents, match only needed ones and transform inner structure by project phase:
var match = {
$match : {
"projects.pid" : {
$in : [ObjectId("5762c0ba2b9a78006373a682"),
ObjectId("5762c2892b9a78006373a686")]
}
}
}
var unwind = {
$unwind : "$projects"
};
// now move array objet as top level object
var project = {
$project : {
_id : "$projects.pid",
name : "$projects.name",
// list other fields here
}
}
db.vic.aggregate([match, unwind, match, project])

How to delete deep array in mongodb?

I am trying to delete "virtualNumber" : "12345" in the following document:
{
"_id" : ObjectId("50a9db5bdc7a04df06000005"),
"billingInfo" : null,
"date" : "dsfdsfsdfsd",
"description" : "sdfsdff",
"pbx" : {
"_id" : ObjectId("50a9db5bdc7a04df06000006"),
"did" : {
"1234567890" : {
"inventoryId" : "509df7547e84b25e18000001",
"didcountry" : "india",
"didState" : "bangalore",
"routeType" : "CallForward",
"didNumber" : "1234567890",
"didVirtualNumbers" : [
{
"virtualNumber" : "12345"
},
{
"virtualNumber" : "56789"
}
],
"id" : ObjectId("50a9db9acdfb4f9217000002")
}
},
},
I am using node.js, so I constructed a query in JavaScript:
var query = {_id: ObjectId("50a9db5bdc7a04df06000005")};
var obj = {};
obj["pbx.did.1234567890.didVirtualNumbers.virtualNumber"]=12345;
//problem
collection.update(query,{$pull:obj});

You need to match the array element like:
{"$pull": {"pbx.did.7259591220.didVirtualNumbers": {"virtualNumber": "12345"}}}
So you should change your code to:
obj["pbx.did.7259591220.didVirtualNumbers"]={"virtualNumber": "12345"};

Please refer to http://www.mongodb.org/display/DOCS/Updating#Updating-%24pull
It mentions the pull field should be an array.