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Questions tagged [datamodel]

According to Hoberman (2009), "A data model is a wayfinding tool for both business and IT professionals, which uses a set of symbols and text to precisely explain a subset of real information to improve communication within the organization and thereby lead to a more flexible and stable application environment.

In software engineering, the term data model is used in two related senses. In the sense covered by this article, it is a description of the objects represented by a computer system together with their properties and relationships; these are typically "real world" objects such as products, suppliers, customers, and orders. In the second sense, covered by the article database model, it means a collection of concepts and rules used in defining data models: for example the relational model uses relations and tuples, while the network model uses records, sets, and fields.

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My new dataModel doesn't replace the old one in my JList

I'm working in a little program that allows you to place things on a map, give it a name or description. The places can have a category that you choose from a JList with a defaultListModel. If I have created some categories and choose to save my…
Filip Blom
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Logical Data Model from XMI file

I want to get the logical data model from XMI file I have, is it posible through Sybase powerdesigner. Thanks & Regards, Yashu Vyas
user5038011
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MongoDB data modeling issue

I'm have put together a schema in MongoDB to model my domain but I'm not sure what's the best approach considering what I will need to search on (premise: it's my first "big" project with a document database and I have quite a strong RDBMS…
Alessandro Di Lello
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Elasticsearch data model

I'm currently parsing text from internal résumés in my company. The goal is to index everything in elasticsearch to perform search on them. for the moment I have the following JSON document with no mapping defined : Each coworker has a list of…
Jean Wisser
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odoo: error creating new form view : Field(s) `arch` failed against a constraint: Invalid view definition

I want to create new form view associated to new data model, I create a new menu item "menu1" that has a submenu "menus" and then, I want to customize the action view. This is my code: My xml file: My data model: from openerp.osv import fields,…
nayomi
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Spring java custom get-method in domain model class

Using Spring data I would like to be able to define a custom get-method inside a domain model class without affecting the model itself. For example, using this model: @Document public class Person { private String firstName; private String…
Neman
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Data model for meteor

I have two collections, malls and shops. I want to keep location information of them (as latitude and longitude). For malls, it is easy, because they have only one location information, so i can define latitude and longitude property. But for shops,…
Ahmet Cetin
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Is there a way to set a list to a models type?

I have a method that is using generics, so the developer can enter in a model of their choice which can be any type (user, employer, ...) these are all custom classes. I want to make a list of this type. Something like this: Public void…
Kevin
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How to manage versions of Data Model Schema versions

I am having an app on app store. I have to update model version after every 2 months on average due to updates. I have 7 versions right now and they will definitely increase in future. I have some questions: How I can efficiently manage this Can…
iBug
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Problems with CoreDataBooks Example from Apple

I am currently playing with CoreData and have a problem with the CoreDataBooks Example from Apple. Basically I just wanted to extend the data model. I updated the model class aswell and no compiler error, butr a crash when I want to start the…
eemceebee
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Mahout in Tomcat giving Error

I have generated a Recommendation engine in Mahout. I have tested the Engine as a Stand Alone Java program. Now I want to deploy it as a Web Application and hence I am using Apache Tomcat to deploy this Java Application. But when I execute my…
user2808660
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SQL - Alternatives to a generic datamodel

while studying, im struggling to find an answer to this question: What is a generic datamodel? Are there any alternatives to a generic datamodel, if so; which one would you recommend? I've looked everywhere to find a decent answer, but i didn't find…
Jurre Sanders
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To draw ER diagram of manufacurer sells products?

I am learning the data model and came accross this situation where a relationship SELLS between manufacturer and Products entities. I don't know how to represent the bolded statements in the question below: " Manufacturers are identified by their…
Chrisantics
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Cassandra DataModel Designing, Composite Key vs Super Column

while designing the datamodel in cassandra. I am stuck while designing the below scenario. Like One API/Webservice can have multiple parameters(input/output). I don't know the parameters count and its column name as well. How to design its…
Usman
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Pros and Crons for Data Model of MongoDB

We're going to implement the feature, It pushes me to ask myself the benefits and defects in MongoDB. I don't want to create any data model in MongoDB and let client side create it by sending me the json object. It's because the schema might be…
MonkeyBBZ
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