I'm using Play (2.4) with reactive mongo. I'm trying to save following document using reactive mongo:
{
"networkStart" : 42540528726795050063891204319802818560,
"networkEnd" : 42540528726795654526801011634390171648,
"lat" : 36.0833,
"lon" : 140.116
}
using following code
val record = GeoIP(... networkStart, networkEnd, lat, lng ...)
val collection: JSONCollection = reactiveMongoApi.db.collection[JSONCollection]("mycolleciton")
collection.save(Json.toJson(record)).map{ r =>
Logger.error(s"Has err: ${r.hasErrors}")
}
but nothing happens. There is no document in mongo DB and there is no error log in logs. When i try to save record with lower numbers e.g. 16777216 in place of network* attributes everything works fine.
Same for searching. When i search using query e.g. {networkStart: {$lte #someNum#}} for #someNum# equals to very big integer i get exception [NoSuchElementException: JsError.get]. When i search for lower number i get correct results.
Am i managing big numbers incorrectly? How can i store them and retrieve using reactive mongo? When i try to insert document with big number manually directly into DB it works.
Edit
I managed to get validation error by debugging. It says:
(,List(ValidationError(List(List((,List(ValidationError(List(List((,List(ValidationError(List(List((,List(ValidationError(List(List((,List(ValidationError(List(unhandled json value: 85060714218195519117058029889198843855),WrappedArray()))))),WrappedArray()))))),WrappedArray()))))),WrappedArray()))))),WrappedArray())))
where the most interesting part is: List(unhandled json value: 85060714218195519117058029889198843855). But why?
Related
I've found this question answered for C# and Perl, but not in the native interface. I thought this would work:
db.theColl.find( { _id: ObjectId("4ecbe7f9e8c1c9092c000027") } )
The query returned no results. I found the 4ecbe7f9e8c1c9092c000027 by doing db.theColl.find() and grabbing an ObjectId. There are several thousand objects in that collection.
I've read all the pages that I could find on the mongodb.org website and didn't find it. Is this just a strange thing to do? It seems pretty normal to me.
Not strange at all, people do this all the time. Make sure the collection name is correct (case matters) and that the ObjectId is exact.
Documentation is here
> db.test.insert({x: 1})
> db.test.find() // no criteria
{ "_id" : ObjectId("4ecc05e55dd98a436ddcc47c"), "x" : 1 }
> db.test.find({"_id" : ObjectId("4ecc05e55dd98a436ddcc47c")}) // explicit
{ "_id" : ObjectId("4ecc05e55dd98a436ddcc47c"), "x" : 1 }
> db.test.find(ObjectId("4ecc05e55dd98a436ddcc47c")) // shortcut
{ "_id" : ObjectId("4ecc05e55dd98a436ddcc47c"), "x" : 1 }
If you're using Node.js:
var ObjectId = require('mongodb').ObjectId;
var id = req.params.gonderi_id;
var o_id = new ObjectId(id);
db.test.find({_id:o_id})
Edit: corrected to new ObjectId(id), not new ObjectID(id)
Even easier, especially with tab completion:
db.test.find(ObjectId('4ecc05e55dd98a436ddcc47c'))
Edit: also works with the findOne command for prettier output.
You Have missed to insert Double Quotes.
The Exact Query is
db.theColl.find( { "_id": ObjectId("4ecbe7f9e8c1c9092c000027") } )
If you are working on the mongo shell, Please refer this : Answer from Tyler Brock
I wrote the answer if you are using mongodb using node.js
You don't need to convert the id into an ObjectId. Just use :
db.collection.findById('4ecbe7f9e8c1c9092c000027');
this collection method will automatically convert id into ObjectId.
On the other hand :
db.collection.findOne({"_id":'4ecbe7f9e8c1c9092c000027'}) doesn't work as expected. You've manually convert id into ObjectId.
That can be done like this :
let id = '58c85d1b7932a14c7a0a320d';
let o_id = new ObjectId(id); // id as a string is passed
db.collection.findOne({"_id":o_id});
I think you better write something like this:
db.getCollection('Blog').find({"_id":ObjectId("58f6724e97990e9de4f17c23")})
Once you opened the mongo CLI, connected and authorized on the right database.
The following example shows how to find the document with the _id=568c28fffc4be30d44d0398e from a collection called “products”:
db.products.find({"_id": ObjectId("568c28fffc4be30d44d0398e")})
I just had this issue and was doing exactly as was documented and it still was not working.
Look at your error message and make sure you do not have any special characters copied in. I was getting the error
SyntaxError: illegal character #(shell):1:43
When I went to character 43 it was just the start of my object ID, after the open quotes, exactly as I pasted it in. I put my cursor there and hit backspace nothing appeared to happen when it should have removed the open quote. I hit backspace again and it removed the open quote, then I put the quote back in and executed the query and it worked, despite looking exactly the same.
I was doing development in WebMatrix and copied the object id from the console. Whenever you copy from the console in WebMatrix you're likely to pick up some invisible characters that will cause errors.
In MongoDB Stitch functions it can be done using BSON like below:
Use the ObjectId helper in the BSON utility package for this purpose like in the follwing example:
var id = "5bb9e9f84186b222c8901149";
BSON.ObjectId(id);
For Pythonists:
import pymongo
from bson.objectid import ObjectId
...
for row in collectionName.find(
{"_id" : ObjectId("63ae807ec4270c7a0b0f2c4f")}):
print(row)
To use Objectid method you don't need to import it. It is already on the mongodb object.
var ObjectId = new db.ObjectId('58c85d1b7932a14c7a0a320d');
db.yourCollection.findOne({ _id: ObjectId }, function (err, info) {
console.log(info)
});
Simply do:
db.getCollection('test').find('4ecbe7f9e8c1c9092c000027');
I have stored following data in MongoDB
db.users.insert({id: 1,user: {firstname:"John",lastname:"Cena",email:["jc#wwe.com","jc1#wwe.com"],password:"YouCantSeeMe",address:{street:"34 some street", country:"USA"}}})
I queried as follows expecting that the first query will not work but the second will. To my surprise, it was the other way round.
This query worked
val query1 = BSONDocument("user.firstname"->user.firstName)
This didn't
val query2 = BSONDocument("user"-> BSONDocument("firstname"->user.firstName))
I observed that query1 creates following structure (by running mongodb in verbose mode, mongodb -v)
{ user.firstname: "John" }
But query2 creates following structure
{ user: { firstname: "John" } }
Aren't these two the same (firstname is inside user)?
They are not the same.
First query works because you are comparing the fields of embedded document using dot notation.
Second query fails because you are comparing document as a whole against a embedded document.
https://docs.mongodb.com/manual/tutorial/query-embedded-documents/
https://docs.mongodb.com/manual/core/document/#dot-notation
I m in the process of creating application where my back end is in go lang and database is mongoDB. My problem is that i have a map in my struct declared like
Data struct {
data map[interface{}]interface{}
}
after adding values in to this like
var data Data
data["us"]="country"
data[2]="number"
data["mother"]="son"
I m inserting it like
c.Insert(&data)
When i insert this i m losing my key and can only see the values...
{
"_id" : Object Id("57e8d9048c1c6f751ccfaf50"),
"data" : {
"<interface {} Value>" : "country",
"<interface {} Value>" : "number",
"<interface {} Value>" : "son"
},
}
May i know any way possible to use interface and get both key and values in my mongoDB. Thanks....
You can use nothing but string as key in MongoDB documents. Even if you would define your Data structure as map[int]interface{} Mongo (don't know if mgo will convert types) wouldn't allow you to insert this object into the database. Actually, you can use nothing but string as JSON key at all as this wouldn't be JSON (try in your browser console the next code JSON.parse('{2:"number"}')).
So define your Data as bson.M (shortcut for map[string]interface{}) and use strconv package to convert your numbers into strings.
But I guess you must look at arrays/slices, as only one reason why someone may need to have numbers as keys in JSON is iterations through these fields in future. And for iterations we use arrays.
Update: just checked how mgo deals with map[int]interface{}. It inserts into DB entry like {"<int Value>" : "hello"}. Where <int Value> is not number but actually string <int Value>
I am inserting json file into Mongodb(with Scala/Play framework) and the same getting/downloading it into my view page for some other requirement, but this time it is coming with one "_id" parameter in the json file.
But I need only my actual json file only that is not having any any "_id" parameter. I have read the Mongodb tutorial, that by default storing it with one _id for any collection document.
Please let me know that how can I get or is there any chance to get my actual json file without any _id in MongoDB.
this is the json result which is storing in database(I don't need that "_id" parameter)
{
"testjson": [{
"key01": "value1",
"key02": "value02",
"key03": "value03"
}],
"_id": 1
}
If you have a look at ReactiveMongo dev guide and to its API, you can see it support projection in a similar way as the MongoDB shell.
Then you can understand that you can do
collection.find(selector = BSONDocument(), projection = BSONDocument("_id" -> 0))
Or, as you are using JSON serialization:
collection.find(selector = Json.obj(), projection = Json.obj("_id" -> 0))
You can use this query in the shell:
db.testtable.find({},{"_id" : false})
Here we are telling mongoDB not to return _id from the collection.
You can also use 0 instead of false, like this:
db.testtable.find({},{"_id" : 0})
for scala you need to convert it in as per the driver syntax.
HI I have following data items in mongo db
{ "id" : 950, "name" : "Name 1" },
{ "id" : 951, "name" : "name 2" }
I have tried mapping id as both Integer and String.
and I used morphia + play to connect mongodb and used DAO of morphia.
I need to do a search by id like (in sql where id like '95%' ) and get the result as list.
List pList = ds.createQuery(Person.class).field("id").startsWith("95").asList(); // this is not working
Any ideas how get this done ??
Having already answered on the play mailing list and the morphia list, i'll answer here so others will see it, too. startsWith() is a text based operation. It doesn't work against numbers. you'll have to use a greaterThan/lessThan query for range checking.