mongodb-java

问题 I want to create the following document schema in mongoDB using the java driver { "_id": { "$oid": "513e9820c5d0d8b93228d7e8" }, "suitename": "testsuite_name", "testname": "testcase_name", "milestones": [ { "milestone_id": "359", "testplans": [ { "pland_id": "965", "runs": [ 6985, 5896 ] }, { "plan_id": "984", "runs": [ 9856, 3684 ] } ] } ] } I have the following code BasicDBObject testObject = new BasicDBObject(); BasicDBObject milestoneObject = new BasicDBObject(); testObject.put("suitename

问题 I am newbie to mongodb. I need to insert a doc without the _id field generating automatically. I need to set the field Tenant_id as unique or need to change the "_id" field to Tenant_id. how to do it? something like this Tenant {Tenant_id: 123, Tenant_info: ...} 回答1: By default, all regular collections automatically insert an _id field if it is absent. However, this behavior can be changed when you create the collection, by setting explicitely the autoIndexId parameter to false. > db

问题 I get this error on a find call (default Java Driver) after a period of inactivity. I tried to add a manual heartbeat (writing to a capped collection), but it didn't help. I only get the issue while being connected to an instance on compose (i.e. not in a local context). MongoDB version is 3.2.8, latest driver (3.3), using Java 8. Any idea ? 回答1: I agree with Rhangaun's answer here is my soluction in code of JAVA: public static DB getMongoDB() { MongoClientOptions.Builder builder = new

问题 I am trying to find documents in MongoDB by searching on "_id" key. My document looks like this- { "_id" : ObjectId("4f693d40e4b04cde19f17205"), "hostname" : "hostnameGoesHere", "OSType" : "OSTypeGoesHere" } I am trying to search this document as- ObjectId id= new ObjectId("4f693d40e4b04cde19f17205"); BasicDBObject obj = new BasicDBObject(); obj.append("_id", id); BasicDBObject query = new BasicDBObject(); query.putAll(query); But I get below error- error: reference to putAll is ambiguous,

问题 I'm new to Spring Data with MongoDB and would like to have an automagically generated query method inside my MongoRepository extension interface which requires filtering, sorting and limiting. The query looks like this: // 'created' is the field I need to sort against find({state:'ACTIVE'}).sort({created:-1}).limit(1) The repository interface looks like this: public interface JobRepository extends MongoRepository<Job, String> { @Query("{ state: 'ACTIVE', userId: ?0 }") List<Job>

问题 I'm developing an Android app that use the java mongodb driver 3.0.3 to connect to every instance of mongodb. The connector code to a generic istance is: try{ MongoCredential credential = MongoCredential.createCredential(user, dbname, pass.toCharArray()); MongoClient mongoClient = new MongoClient( new ServerAddress(server , port ), Arrays.asList(credential)); MongoDatabase db = mongoClient.getDatabase(dbname); System.out.println("Connect to database successfully "); Iterator i= mongoClient

问题 I'm developing an Android app that use the java mongodb driver 3.0.3 to connect to every instance of mongodb. The connector code to a generic istance is: try{ MongoCredential credential = MongoCredential.createCredential(user, dbname, pass.toCharArray()); MongoClient mongoClient = new MongoClient( new ServerAddress(server , port ), Arrays.asList(credential)); MongoDatabase db = mongoClient.getDatabase(dbname); System.out.println("Connect to database successfully "); Iterator i= mongoClient

问题 I am using MongoDB in my application and was needed to insert multiple documents inside a MongoDB collection . The version I am using is of 1.6 I saw an example here http://docs.mongodb.org/manual/core/create/ in the Bulk Insert Multiple Documents Section Where the author was passing an array to do this . When I tried the same , but why it isn't allowing , and please tell me how can I insert multiple documents at once ?? package com; import java.util.Date; import com.mongodb.BasicDBObject;

问题 I'm running a $geoNear query on my sharded cluster (6 nodes with 3 replica sets each of 2 shardsvr and 1 arbiter). I expect the query to return 1.1m documents. I am recieving only ~130.xxx documents. I am using the Java driver to issue the query and process the data (for now, I'm just counting the documents that get returned). I am using MongoDB 3.2.9 and the latest java driver. The mongod log shows the following error which is caused by the output document getting larger than 16MB: 2016-10

问题 i have a spring @Document object Profile i would like to reference GridFSFile like it : @DbRef private GridFSFile file; the file is writen into another collection type GridFS. I always have a java.lang.StackOverflowError when i set profile.setFile(file); java.lang.StackOverflowError at org.springframework.util.ObjectUtils.nullSafeHashCode(ObjectUtils.java:336) at org.springframework.data.util.TypeDiscoverer.hashCode(TypeDiscoverer.java:365) at org.springframework.data.util