Tag mongodb

[Solved] Spring MVC, Maven, CRUD, MongoDB [closed]

Please read your error messages more carefully. You have an autowiring problem: NoSuchBeanDefinitionException: No qualifying bean of type **’com.mthree.service.UserService’** available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)} You should add an annotation to tell…

[Solved] NoSQL && mongodb database

Aggregation Pipeline: A pipeline of predefined operators Some operators ($match, $project) can be executed in parallel when sharding is used very fast you can iterate over the output or use the $out operator to store it into a collection easy…

[Solved] What should I do in this emergency?

In MongoDB replication, the primary node writes events to the oplog that describe the writes as they occur. Secondary nodes copy apply these events and replay them so that the data on the secondary is logically the same as that…

[Solved] Using Python need to print in csv format

I slightly changed the input data into a form which would make more sense technically speaking. In addition I removed the ResultId() since this seems to be a special datatype which needs to be converted into a string separately before…

[Solved] Read data from mongodb using java [closed]

You should be able to cast DBObject to one of it’s implementation (see all implementations here : ), in this case BasicDBList, which extends ArrayList , so you can use all methods from arrayList there. Mongo mongo = new Mongo(“localhost”,…

[Solved] How to get mongoDB aggregated month wise data using java [closed]

Use the aggregation framework with following aggregation pipeline (Mongo shell implementation): db.ledger.aggregate([ { “$unwind”: “$Accounts” }, { “$project”: { “Total_Credits” : “$Accounts.Total_Credits”, “Total_Debits” : “$Accounts.Total_Debits”, “month_year” : { “$substr”: [ “$Accounts.Date”, 3, -1 ] } } }, { “$group”: {…