relationship

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Grails - multiple objects database relationship

I have a non-Grails specific question, but I intend to implement it with it. Anyway. I would like to ha开发者_开发问答ve a One-to-Many domain class relationship, but I would like the Many part to be o[详细]

2023-04-13 07:56 分类：问答
Select database records which are m:n-related to records from another table

I\'m trying to select all records from table A which are related to X certain records in table B (m:n relationship).[详细]

2023-04-12 17:00 分类：问答
Triggering a workflow on the creation of a 1:N Relationship?

I am trying to run a workflow on the creation of a 1:n relationship. I have a Contact entity, and PortalRole entity. When I associate the PortalRole with the contact I would like to trigger a workflo[详细]

2023-04-12 01:03 分类：问答
java class relations,Generalization Realization Association Aggregation Composition Dependency

here are some question after I have looked at wikipedia: Association: \"Association represents the static relationship shared among the objects of two classes.\", does this mean aggregation and compo[详细]

2023-04-11 19:45 分类：问答
NSPredicate + itemLocations == location

I\'m having the case where I have the database of items. Each item can have multiple locations. Now 2 questions:[详细]

2023-04-10 18:27 分类：问答
How to check if relationship exists - Many to many relationship

I need your help to figure out how to make a query. My idea was to build a credit system to reward users.[详细]

2023-04-09 08:04 分类：问答
Hibernate: Parent-Child Relationship to Itself

I have two tables: TABLE NAME: TABLE_A A_ID A_CODE A_DESC TABLE NAME: TABLE_B B_ID B_TABLE_A_PARENT_ID B_TABLE_A_CHILD_ID[详细]

2023-04-09 06:09 分类：问答
Rails: Changing relationship after initial migration

I am having some trouble finding a good answer to my question on rails relationship creation. If I already ran the initial migration for my user model and my comment model Without declaring a relati[详细]

2023-04-08 01:38 分类：问答
Delete OneToOne relationship

We have the following mapping: @Entity public class A { private B b; @OneToOne public B getB() { return b; }[详细]

2023-04-07 16:59 分类：问答
JPA relation Persistence

I am using JPA 2 with following jars on class path [INFO] +- org.aspectj:aspectjrt:jar:1.6.9:compile [INFO] +- org.aspectj:aspectjweaver:jar:1.6.9:compile[详细]

2023-04-06 22:38 分类：问答