entity-relationship

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Modeling a one-to-many relationship in Core Data for iOS

I have two entities: patient and checkpoint. Patient has attributes such as DOB, n开发者_如何学JAVAame, ID, etc.[详细]

2023-03-13 19:17 分类：问答
Using DataAnnotations (DisplayColumn) in WCF RIA Services

I have created an entity framework 4.0 (DB-First) model, added my partial classes and used DataAnnotations on them to have a perfect UI on the client.[详细]

2023-03-13 07:55 分类：问答
How to implement multi layered "Include" in Entity framework 3.5 (VS 2008)

My DB have two tables - Question and Topic. To implement many-to-many relation, there is a mapping table which has following structure:[详细]

2023-03-13 03:29 分类：问答
When is it appropriate to use a bidirectional association and when is it not?

Let\'s pretend that we want to build an eBay like app in which we have an entity named Customer and an entity named Order.[详细]

2023-03-13 01:16 分类：问答
Liferays Service Builder - many-to-many relations

I\'m trying to create a many-to-many between my own entity and the liferay Group entity. My service.xml looks like this[详细]

2023-03-12 00:16 分类：问答
What is the best way of extracting information from a existing database without having the complete entity structure in a new java application?

The current application that I\'m involved in is somewhat a monster with a very complex entity structure and a very tight co开发者_运维知识库upling to the Seam framework.[详细]

2023-03-11 19:28 分类：问答
What do we call this diagram as?Do we call it as E-R diagram?

Thanks a lot for your he开发者_运维问答lp. I really need to make it clear :( Yes, this is an Entity Relationship Diagram, using Chen\'s notation.[详细]

2023-03-11 12:25 分类：问答
Find Parent EntityKey and Type in Entity Framework

Is it possible to get the EntityKey and type of an entity\'s parent entity without knowing the type?I\'ve tried doing the following[详细]

2023-03-11 02:32 分类：问答
Database models site

There was a site which had a lot of database entity relation diagrams models, I helped a lot a开发者_如何学Cs a guide, because some of the implementations proposed where really good.[详细]

2023-03-10 18:45 分类：问答
JPA : best practices with unidirectional OneToMany

I have several little questions about best practices with JPA (via hibernate). My first question is about the complexity of one domain model.[详细]

2023-03-10 17:21 分类：问答