Questions tagged as 'nosql'

Tagged questions
2
answers

Control of high demand stock with firebird and / or mongodb

I'm thinking of migrating my ERP (currently in Java) from a relational database (currently in Firebird) to a NoSQL (probably MongoDB). I am planning and trying to anticipate possible problems. The goal is to build a control that will never let t...
asked by 15.01.2018 / 16:30
1
answer

Multiple applications consuming the same database

Today I have an application that uses a database (MongoDB), but I have few users yet and as we know it is very difficult to have an application that will succeed and accumulate many users. Thinking about this I am planning to create a second a...
asked by 04.12.2018 / 00:19
1
answer

Edit an element within an object, within an array, with Mongoose

I need a help! I'm new to Node.JS and I decided to "create a system" to put into practice what I already know and create challenges to encourage my learning! I did a beginner workshop (with Jean Carlo Suissa) that gave me a good foundation, but...
asked by 04.03.2015 / 02:21
1
answer

Firebase Insertion Problems

I'm developing a native application on Android that uses maps, insertion is usually happening through the code below. Location is a variable of type LatLng . mDataBase.child("location").child("Roubo").child(String.valueOf( new Date()....
asked by 18.11.2017 / 14:32
1
answer

Relationship between documents - MONGODB

I have the following template: A schema called suspects, which has information from suspects. And other 3 so-called alerts, criminal actions and risky events. These 3 other schemas, should have the data of suspects, for example, the same suspect...
asked by 26.10.2017 / 15:47
2
answers

Retrieve the value of an attribute of a generic object in Java

I'm doing a system where I read Java objects, of different types, from XML files. So I do not have a single type of object and consequently I do not know its attributes or methods. I would like to perform a search, enter a string indicating attr...
asked by 26.02.2016 / 18:01
0
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Firebase - Relationship between documents

I know the firebase is NoSQL / NoREL, but I have this doubt and it is very relevant given the project I am developing. In the traditional MySQL model, when we have a categorias table, for example, and a posts table, and there is a rel...
asked by 08.06.2018 / 01:45
2
answers

Collate MongoDb

I need to do an auto complete that consumes a mongodb database. The words can be written with or without accent, uppercase or lowercase, that is, I need to define a collage in the mongo that allows me to do a search that ignores accent and case...
asked by 05.11.2015 / 13:47
2
answers

How to get non-duplicate records with mongoDB and Morphia?

How do I get mongoDB to return a list of non-duplicate documents. In my case, the mongoDB returns a list of ingredients from all the recipes registered, but I want those records without duplication because the recipes can repeat the same ingr...
asked by 06.05.2016 / 19:32
3
answers

List keyspaces in Cassandra

I need to learn how to use Apache Cassandra. I'm following a book called Cassandra: The Definitive Guide - Jeffrey Carpenter. I was able to do the installation in a good way, it seems, but when I execute the command: sudo cassandra -f I get...
asked by 17.10.2016 / 18:09