composite-key

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NHibernate MySQL Composite-Key

I am trying to create a composite key that mimicks the set of PrimaryKeys in the built in MySQL.DB table.[详细]

2022-12-27 07:54 分类：问答
How should I define a composite foreign key for domain constraints in the presence of surrogate keys?

I am writing a new app with Rails so I have an id column on every table. What is the best practice for enforcing domain constraints using foreign keys? I\'ll outline my thoughts and frustration.[详细]

2022-12-25 10:37 分类：问答
Asp.Net MVC Create/Update/Delete with composite key

I\'m not sure how to use composite key. My Categories table has CategoryId (PK,FK), Langua开发者_C百科geId (PK,FK), CategoryName[详细]

2022-12-25 09:27 分类：问答
Is it possible to break a Composite key?

Is it possible to break the composite key 开发者_JAVA百科of a table and use one of them as a primary key for other table? If yes, then please tell me how can I do it?Generally you use a composite key[详细]

2022-12-23 21:46 分类：问答
Why isn't the composite_primary_keys gem for Rails working?

I\'ve followed the instructions here, installing the composite_primary_keys gem via sudo gem install composite_primary_keys[详细]

2022-12-22 05:24 分类：问答
How do I get a value from a composite key table using a Rails model?

I have the following schema (* means primary key): languages id* english_name native_name native_to_target_languag开发者_如何学编程e[详细]

2022-12-21 21:37 分类：问答
Using NHibernate's ISession.Get<>() w/ a composite key [duplicate]

This question already has an answer here: nHibernate Composite Key Class Type Mismatch (1 answer) Closed 2 years ago.[详细]

2022-12-20 03:28 分类：问答
Fluent NHibernate: How to Map M:N many-to-many with composite keys on both sides

OK, so here is the problem. Its not even as crazy as the guy who wants to map m:n with different column counts in his PKs.[详细]

2022-12-18 15:27 分类：问答
Conditional composite key in MySQL?

So I have this table with a composite key, basically \'userID\'-\'data\' must be unique (see my other question SQL table - semi-unique row?)[详细]

2022-12-16 10:46 分类：问答
NHibernate - Deleting objects with composite PK, when one of the PK columns is NULL

Hey, i\'m trying to delete an entity of the following structure from an Oracle 10g tables: class Record[详细]

2022-12-13 13:43 分类：问答