当我在MongoDB上使用rest api时，为什么我没有得到确切的数据？

Question

I am getting following data when I am using MongoDB Rest API.

Cursor id=0, ns=test.products, query={ }, numIterated=1,    addr=localhost/127.0.0.1:27017, readPreference=primary

I am expecting JSON data, but I am not getting that data. For this i am maintaining following URL

localhost:8080/API/rest/applicationInitiatorService/addContact

Please find the below Code

   import javax.ws.rs.*;    
   @Path("/applicationInitiatorService/")
   public class ApplicationInitiatorService {
    @GET
    @Path("/addContact")
    @Produces("application/json")
    public Response add_Contact() {
        DBCursor cursor=null;
        cursor=ApplicationInitiatorFactory.getApplicationinitiator().add_record(getcCollection);
        String addrecord=cursor.toString(); 
        return Response.status(200).entity(addrecord).build();   
   }}

And find Respected method where I am calling a method.

public DBCursor add_record(DBCollection db_collection) {
    BasicDBObject document = new BasicDBObject();
    document.put("database", "Bosch_DB");
    document.put("table", "generating");
    BasicDBObject documentDetail = new BasicDBObject();
    documentDetail.put("total_phone_no", 100);
    documentDetail.put("vps_index", "vps_index1");
    documentDetail.put("active", "true");
    document.put("detail", documentDetail);
    db_collection.insert(document);
    DBCursor cursorDoc = db_collection.find();
    while (cursorDoc.hasNext()) {
    System.out.println(cursorDoc.next());
         }
return cursorDoc;   
}

Answer 1

This data is comming your REST api, please check the api code and see whats happening there. My guess is you are returning the incorrect variable.

Could you include the code from your API call ?

UPDATE: I would suggest you change:

String addrecord=cursor.toString(); 

to:

String addrecord=cursor.next().toString(); 

Answer 2

I think probably something to do with cursor or toString. Could you try converting the cursor data to a collection and return it?

public DBCursor add_record(DBCollection db_collection) {
    BasicDBObject document = new BasicDBObject();
    document.put("database", "Bosch_DB");
    document.put("table", "generating");
    BasicDBObject documentDetail = new BasicDBObject();
    documentDetail.put("total_phone_no", 100);
    documentDetail.put("vps_index", "vps_index1");
    documentDetail.put("active", "true");
    document.put("detail", documentDetail);
    db_collection.insert(document);
    return db_collection.find();
}

Something like

import javax.ws.rs.*;    
@Path("/applicationInitiatorService/")
public class ApplicationInitiatorService {
    @GET
    @Path("/addContact")
    @Produces("application/json")
    public Response add_Contact() {
        DBCursor cursor = ApplicationInitiatorFactory.getApplicationinitiator().add_record(getcCollection);
        return Response.status(200).entity(cursor.toArray()).build(); 

    }
}

or you can try the return statement as

return Response.status(200).entity(new Gson().toJson(cursor.toArray())).build();

For this you will need to use Gson library.