mongodb

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

by

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 Spring that your bean is under its control: @Service(value = “userService”) public class UserServiceImpl implements … Read more

[Solved] NoSQL && mongodb database

by

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 to develop and debug: Start with just one operator, look at the output, continue with … Read more

[Solved] Can somenone translate this from Ruby to Python. Its a basic map function [closed]

by

So to answer your questions regarding operators like << or ||= []: << appends an element to an array (or appends strings), in the case above it’s used to append the comment object to either the results array or or the threaded thingy. ||= basically means, if left-hand-side is undefined then evaluate & assign right-hand-side … Read more

[Solved] What should I do in this emergency?

by

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 on the primary. A delayed secondary node will copy the events from the primary as … Read more

[Solved] Using Python need to print in csv format

by

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 doing any further data handling after receiving the responses from the database. However, I would … Read more

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

by

You should be able to cast DBObject to one of it’s implementation (see all implementations here : https://api.mongodb.com/java/3.0/com/mongodb/DBObject.html), in this case BasicDBList, which extends ArrayList , so you can use all methods from arrayList there. Mongo mongo = new Mongo(“localhost”, 27017); DB db = mongo.getDB(“test”);// Use DB DBObject allQuery = new BasicDBObject(); DBCollection collection = … Read more

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

by

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”: { “_id”: “$month_year”, “Total_Credits”: { “$sum”: “$Total_Credits” }, “Total_Debits”: { “$sum”: “$Total_Debits” } } } ]) … Read more

[Solved] How to represent distinct query of mongo db in java language [closed]

by

Considering item.sku is of a String Type, you can fire your distinct query like this: BasicDBObject filter = new BasicDBObject(); filter.put( “dept”, “A” ); MongoCursor<String> c = db.getCollection(“inventory”).distinct(“item.sku”, filter, String.class).iterator(); Hope this helps. solved How to represent distinct query of mongo db in java language [closed]

[Solved] I am getting error while trying to login through valid email and password,which is stored in the database

by

Hey just remove attr_accessor :password from model. It works class User include Mongoid::Document attr_accessor :password//remove this line field :name, type: String field :category, type: String field :email, type: String field :password, type: String validates :name, presence: true ,format: { with: /\A[a-zA-Z]+\z/} validates :email, presence: true , format: { with: /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i } , uniqueness: { case_sensitive: … Read more

[Solved] Parse error: syntax error, unexpected ‘}’ in C:\xampp\htdocs\lib\autors.php on line 8 [closed]

by

try { $connection = new Mongo(); $database = $connection->selectDB(‘lib’); $collection = $database->selectCollection(‘autor’); } catch(MongoConnectionException $e) { die(“Failed to connect to database “.$e->getMessage()); } 1 solved Parse error: syntax error, unexpected ‘}’ in C:\xampp\htdocs\lib\autors.php on line 8 [closed]