relationships

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What are methods of programmatically detecting many-to-many relationships in a RDMBS?

I\'m currently busy making a Python ORM which gets all of its information from a RDBMS via introspection (I would go with XRecord if I was happy with it in other respects) — meaning, the end-user onl[详细]

2023-01-19 16:11 分类：问答
drupal user relationships

hey all, throwing this one out there... hope it\'s a simple one. using the drupal module user relationships i can see my relationships by going to[详细]

2023-01-18 14:52 分类：问答
When can I use Unidirectional relationships in NHibernate?

I\'m trying to port a large graph of .NET entities to use NHibernate, but I\'m encountering an issue that most of the relationships are only defined unidirectionally - in most cases, the child class c[详细]

2023-01-16 05:13 分类：问答
Hibernate: Where do insertable = false, updatable = false belong in composite primary key constellations involving foreign keys?

When implementing composite primary keys in Hibernate or other ORMs there are up to three places where to put the insertable = false, updatable = false in composite primary key constellations that use[详细]

2023-01-15 02:37 分类：问答
Displaying RoR relationship

I have setup a model relationship and all is working well when I use code similar to: @parent.child.each do |item|[详细]

2023-01-14 02:39 分类：问答
Convert many to many to one to one (mysql)

We changed database schema and moved a relationship between users/accounts from a 1-1 to a many to many using a join table accounts_users.[详细]

2023-01-11 22:51 分类：问答
Why am I getting an undefined property error when my relationships seem correct?

I\'m having a slight problem that I can\'t figure out, but should be really simple. I have the following model structure in my cakePHP (1.3) app:[详细]

2023-01-07 02:59 分类：问答
Is it possible to add WHERE clauses when retrieving relationships?

In doctrine, is it possible to add a WHERE clause when fetching a property of an object that corresponds to a relationship?[详细]

2023-01-06 03:08 分类：问答
Core Data - Entity Relationships Not Working as expected

I have set up my data model in xcode like so EntityA AttA1 AttA2 EntityB AttB1 AttB2 AttB3 I then set up the relationships[详细]

2023-01-04 07:38 分类：问答
Refinery CMS (Rails): Creating a plugin or plugins with multiple models and relationships

My goal is to create a way for an admin to create two models in the Refinery admin: Campaigns and Videos[详细]

2022-12-30 18:58 分类：问答