I'm trying to perform an update on an embedded document in MongoDB with the Java driver but receive an IllegalArgumentException that states "fields stored in the db can't have . in them"
My document has the structure:
{
"_id" : ObjectId("5155d102a47d7b00b7e4bed2"),
"foo" : {
"bar" : {
"name" : "Now"
}
}
}
and I want to perform an update like this
var query = {_id:ObjectId("5155d102a47d7b00b7e4bed2")};
var update = {"foo.bar.time":new Date()};
var withSet = {$set:update};
db.samples.update(query,withSet);
which from the console correctly modifies the document
{
"_id" : ObjectId("5155d102a47d7b00b7e4bed2"),
"foo" : {
"bar" : {
"name" : "Now",
"time" : ISODate("2013-03-29T18:02:51.591Z")
}
}
}
Trying to do the same in Java I have not been successful. I've tried this:
BasicDBObject query = new BasicDBObject("_id", new ObjectId("5155d102a47d7b00b7e4bed2"));
BasicDBObject time = new BasicDBObject("time", new Date());
BasicDBObject bar = new BasicDBObject("bar", time);
BasicDBObject foo = new BasicDBObject("foo", bar);
BasicDBObject withSet = new BasicDBObject("$set", foo);
samples.update(query, withSet);
But it clobbers the embedded bar object, destroying name.
I've also tried:
BasicDBObject foo = new BasicDBObject();
foo.append("foo.bar.time", new Date());
samples.update(query, foo)
But receive an IllegalArgumentException.
I've seen other answers chosen on Stack Overflow that include this dot notation. Is there something I'm missing? What is the proper way to update a field in an embedded document?
In your last example the $set part is missing, maybe this causes the problem. Try
samples.update(
query,
new BasicDBObject(
"$set",
new BasicDBObject("foo.bar.time", new Date())
));
instead.
Related
I am a little confused as to how to add an element to an array in an exisiting mongodb document, or why my results are not showing properly and how I expect.
There is only one document in the collection and will only ever be one. The mongo document looks like when I do a db.collection-name.find.pretty() command in a mongo session on the command line:
{
"_id" : ObjectID("1234567890"),
"details" : {
...
},
"calculations" : [
{
"count" : 1,
"total" : 10,
"mean" : 2.5
},
{
"count" : 2,
"total" : 20,
"mean" : 6.4
}
]
}
I want to add another object to the calculations list.
The Java code I am running is based upon THIS example:
// Get the database and collection
MongoDatabase database = mongo.getDatabase(dataBaseName);
MongoCollection<Document> collection = database.getCollection(collectionName);
Document document = collection.find().first(); // will only ever be one document
// The object comes in as a Map
Map<String, Object> incomingMap = new HashMap<>();
incomingMap.put("count", 3);
incomingMap.put("total", 4);
incomingMap.put("mean", 7.9);
// convert to a Document
Document newDocument = new Document();
incomingMap.forEach((k, v) -> {
newDocument.append(k, v);
});
// append this to the collection - this is where I am confused
// for this example just hardcoding the _id value for simplicity
collection.updateOne(new Document("_id", "1234567890"), Updates.push("calculations", newDocument));
However when I do a System.out.println(collection.find().first()) in the code after this or db.collection-name.find.pretty() in a mongo session the new document has not been added. There are no errors thrown and completes fine.
What I am wondering is
Is the line collection.updateOne(new Document("_id", "1234567890"), Updates.push("calculations", newDocument)); correct?
Has it been added but not been saved - if so how do I save?
Can I do this at a document level, for example document.update(new Documen(Updates.push("calculations", newDocument)); or similar?
I have also tried collection.findAndUpdateOne(new Document("_id", "1234567890"), Updates.push("calculations", newDocument)); with the same result
Is how I am getting/hardcoding the document ID incorrect?
You have filter condition issue (your _id is ObjectId type)
new Document("_id", ObjectId("1234567890"))`
Always make sure your documents updated correctly. Look code fagment:
UpdateResult result = collection.updateOne(filter, update);
log.info("Update with date Status : " + result.wasAcknowledged());
log.info("Nº of Record Modified : " + result.getModifiedCount());
https://api.mongodb.com/java/3.1/com/mongodb/client/result/UpdateResult.html
I am using Java Driver for MongoDB to query database. I am getting syntax errors when trying to execute range query on a date field in aggregation. It works fine if I use it as part of find query only. Aggregation is the problem here. I used the following Java query code :
new BasicDBObject("requestDate", BasicDBObjectBuilder.start("$gte", fromDate).add("$lte", toDate).get());
requestDate is the field I want to query. I tried debugging the code and ran the generated query using command line and I still get syntax errors. Not sure whats wrong here.
Mongo Query generated by the code:
{ "requestDate" : { "$gte" : { "$date" : "2015-03-01T05:00:00.000Z"} , "$lte" : { "$date" : "2015-03-09T04:00:00.000Z"}}}
EDIT. Adding relevant Code:
BasicDBObject match = null;
if (organizationId != null) {
match = new BasicDBObject("$match", new BasicDBObject("organizationId", organizationId));
}
if (optionalParams != null) {
Date fromDate = (Date) optionalParams.get("fromDate");
Date toDate = (Date) optionalParams.get("toDate");
if (match == null) {
match = new BasicDBObject("requestDate", new BasicDBObject("$gte", fromDate).append("$lte", toDate));
} else {
match.append("requestDate", new BasicDBObject("$gte", fromDate).append("$lte", toDate));
}
}
DBObject project = new BasicDBObject("$project", MongoDBUtil.getProjectDateFields());
DBObject groupFields = new BasicDBObject("_id", MongoDBUtil.getGroupDateFields()).append("total", new BasicDBObject("$sum", 1));
DBObject group = new BasicDBObject("$group", groupFields);
DBObject sort = new BasicDBObject("$sort", new BasicDBObject("_id", 1));
List<DBObject> pipeline;
if (match != null) {
pipeline = Arrays.asList(match, project, group, sort);
} else {
pipeline = Arrays.asList(project, group, sort);
}
In brief, you broke your $match pipeline stage construction because like all pipeline directives that "key" is "mandatory. Your conditional building should not be checking is the existing state is null but rather "appending" to what you need to define at the top as a "empty" $match:
// BasicDBObject match = null; // wrong!
BasicDBObject match = new BasicDBObject("$match", new BasicDBObject()); // correct!
if (organizationId != null) {
match.append("organizationId", organizationId);
}
if (optionalParams != null) {
Date fromDate = (Date) optionalParams.get("fromDate");
Date toDate = (Date) optionalParams.get("toDate");
match.append("requestDate", new BasicDBObject("$gte", fromDate)
.append("$lte", toDate));
}
So then, without a value for organizationId you get a pipeline generated like so:
{ "$match": {
"requestDate" : {
"$gte" : { "$date" : "2015-03-01T05:00:00.000Z" },
"$lte" : { "$date" : "2015-03-09T04:00:00.000Z" }
}
}
Without that $match key this is not a valid pipeline stage and it will error on submission to the aggregation pipeline.
There is nothing wrong with the generated syntax and all, full explanation is in the manual under Extended JSON. The MongoShell uses "strict" mode as mentioned there so it requires it's own wrappers.
I have a device collection.
{
"_id" : "10-100-5675234",
"_type" : "Device",
"alias" : "new Alias name",
"claimCode" : "FG755DF8N",
"hardwareId" : "SERAIL02",
"isClaimed" : "true",
"model" : "VMB3010",
"userId" : "5514f428c7b93d48007ac6fd"
}
I want to search document by _id and then update it after removing a field userId from the result document. I am trying different ways but none of them is working. Please help me.
You can remove a field using $unset with mongo-java driver in this way:
MongoClient mongo = new MongoClient("localhost", 27017);
DB db = (DB) mongo.getDB("testDB");
DBCollection collection = db.getCollection("collection");
DBObject query = new BasicDBObject("_id", "10-100-5675234");
DBObject update = new BasicDBObject();
update.put("$unset", new BasicDBObject("userId",""));
WriteResult result = collection.update(query, update);
mongo.close();
The easiest way is to use the functionality in the java driver:
Query query = new Query();
query.addCriteria(Criteria.where("_id").is(new ObjectId("10-100-5675234")));
Update update = new Update();
update.unset("userId"); //the fields you want to remove
update.set("putInYourFieldHere", "putInYourValueHere"); //the fields you want to add
mongoTemplate.updateFirst(query, update, Device.class);
The above code assumes that your "_id" is your mongodb normal "_id" which means that the variable you are looking for must be encased in the new ObjectId().
Long time since this post was opened, but might be useful for someone in the future.
device.updateMany(eq("_id", "whatever"), unset("userId"));
An ugly way is to replace the old version with the new version of you document (no userid).
BasicDBObject newDocument = new BasicDBObject();
newDocument.put("_type", "Device");
newDocument.put("alias", "new Alias name");
// ...
BasicDBObject searchQuery = new BasicDBObject().append("_id", "10-100-5675234");
collection.update(searchQuery, newDocument);
The MongoDB documentation provides a clear answer to this question: use the $unset update operator.
Is this type of query possible?
I need to query the database for data for a specified date for a set of specified stocks. So the data needs to have "this" date and be one of "these" symbols.
I have the following code:
public void findDateStockSet(String date, ArrayList<String> symbolSet) throws UnknownHostException {
this.stocks = this.getCollectionFromDB();
BasicDBObject objectToFind = new BasicDBObject();
List<BasicDBObject> obj = new ArrayList<BasicDBObject>();
obj.add(new BasicDBObject("date", date));
obj.add(new BasicDBObject("symbol", new BasicDBObject("$in", symbolSet)));
objectToFind.put("$and", obj);
DBCursor cursor = this.stocks.find(objectToFind);
System.out.println("Finding Stocks");
while (cursor.hasNext()) {
System.out.println(cursor.next());
}
System.out.println();
}
This always comes up null. Can someone explain how to make a query like this work?
You don't need to use $and operator, just build the query as the json below:
{ "date" : "20100223", "symbol" : { $in : [ "appl", "goog" ] } }
I like to use BasicDBObjectBuilder util class to build DBObjects. So your query will be:
DBObject query = BasicDBObjectBuilder.start()
.add("date", date)
.push("symbol")
.add("$in", symbolSet)
.get();
I have some documents in my mongodb as follows
{"Filename":"PHP Book.pdf","Author":"John" ,"Description":"This is my PHP Book"}
{"Filename":"Java Book.html" ,"Author":"Paul" ,"Description":"This is my JAVA Book"}
{"Filename":".NET Book.doc" ,"Author":"James" ,"Description":"This is my .NET Book"}
I have created text index on Description field and below is my code which does full text search on Description field.
m = new Mongo("10.0.0.26", 27017);
DB db = m.getDB("soft") ;
DBCollection col = db.getCollection("pocnew") ;
String collection = col.toString();
DBObject searchCmd = new BasicDBObject();
searchCmd.put("text", collection);
searchCmd.put("search", "php");
CommandResult commandResult = db.command(searchCmd);
System.out.println(commandResult);
I am getting following result
{ "serverUsed" : "/10.0.0.26:27017" , "queryDebugString" : "php||||||" , "language" : "english" , "results" : [ { "score" : 0.5833333333333334 , "obj" : { "_id" : { "$oid" : "51cd7d302d45471420c1132b","Filename":"PHP Book.pdf","Author":"John" ,"Description":"This is my PHP Book"}]}}
My requirement is to display only filename field value i.e only PHP Book.pdf
please suggest me
Thanks
You may have to dig through the returned document to get to Filename
CommandResult commandResult = db.command(searchCmd);
BasicDBList results = (BasicDBList)commandResult.get("results");
for( Iterator< Object > it = results.iterator(); it.hasNext(); )
{
BasicDBObject result = (BasicDBObject) it.next();
BasicDBObject dbo = (BasicDBObject) result.get("obj");
System.out.println(dbo.getString("Filename"));
}
In addition, if you just need the Filename field, you may want to add project option in searchCmd to limit the number of fields returned in search results. See the following link for text command returned document details and project option.
http://docs.mongodb.org/manual/reference/command/text/