relationship

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rails models for address books (company, person, address)

I want to create address-book-like set of models to represent company, person, location, etc. This looks like very typical address book, I wonder if somebody did it already with ruby on rails 3. The q[详细]

2023-03-08 09:07 分类：问答
Database relationship cycle

Database relationship cycles smell like bad database design. Below is a situation in which I think it can not be prevented:[详细]

2023-03-08 01:44 分类：问答
CakePHP Model Relationship with Multiple Foreign Keys

In my CakePHP app I have models for Matches and Teams. Each Match has a home_team_id and an away_team_id, both of which reference a different Team.[详细]

2023-03-07 09:50 分类：问答
UML association vs. composition and detail level

Actually, make that a couple of amateur UML questions! When creating a UML diagram to model some domain concepts and you come across a domain concept that \"holds\" some information about another conc[详细]

2023-03-07 08:07 分类：问答
How to access SQL Relationship/Parent/Foreign-Keys in GridView's HyperLinkField?

I have a question about GridView. In my code, I have a HyperLinkField like below: <asp:HyperLinkField Dat开发者_JAVA百科aTextField=\"DocumentAlbum.Name\" HeaderText=\"Nama Album\" SortExpression=\[详细]

2023-03-06 21:57 分类：问答
SQLAlchemy: add a relationship using id instead of object?

Is it possible to add to a SQLAlchemy relationship using ids rather than objects? For example, consider two declarative SQLAlchemy classes, Review and Artist, with a relationship between them:[详细]

2023-03-06 20:19 分类：问答
What is the (preferrably one-word) primary term for @XToX annotated fields?

Question pretty much says it all. You can read \"entity association\" here, but there\'s \"relationship\" here[详细]

2023-03-04 14:17 分类：问答
Core Data Sort Descriptors with relationships between Entities

I have two entities, Job and Client. The relationship from job to client is called clientOfJob which is a many-to-one relationship:[详细]

2023-03-04 06:35 分类：问答
Core Data: Finding Related Objects

I am having some issue with understanding of Core Data. In my program there are two entities, say A and B. They have both references on each other and A has a to-many relationship to B.[详细]

2023-03-02 20:04 分类：问答
How to Insert Core Data Record Related to Another Without Duplication

I have two core data entities, Articles and Favorite. Articles has To-Many relationship to Favorite. First, I inserted all Articles object successfully.[详细]

2023-03-02 12:18 分类：问答