ActiveRecord fundamentally incompatible with composite keys?

Posted by stimms on Stack Overflow See other posts from Stack Overflow or by stimms
Published on 2009-11-23T17:45:29Z Indexed on 2010/03/23 12:03 UTC
Read the original article Hit count: 388

Filed under:

subsonic3

|

activerecord

I have been attempting to use subsonic for a project on which I'm working. All was going quite well until I encountered a link table with a composite primary key. That is a key made up of the primary keys of the two tables it joins. Subsonic failed to recognize both keys which was problematic. I was going to adjust subsonic to support compound keys but I stopped and though "Maybe there is a reason for this". Normally active record relies on a single primary key field for every record, even in link tables. But is this necessary? Should I just give up on active record for this project or continue with my modifications?

© Stack Overflow or respective owner

Related posts about subsonic3

How to log subsonic3 sql

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I'm starting to develop a new asp.net application based on subsonic3 (for queries) and log4net (for logs) and would like to know how to interface subsonic3 with log4net so that log4net logs the underlying sql used by subsonic. This is what I have so far: public static IEnumerable<arma_ocorrencium>… >>> More
Left Join in Subsonic3

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi there, I'm new in subsonic3, and I'm getting some errors when I try to use LeftJoin var q = from c in categories join p in products on c equals p.Category into ps from p in ps.DefaultIfEmpty() select new { Category = c, ProductName = p == null ? "(No products)" : p.ProductName… >>> More
Help with Subsonic3 ActiveRecord LINQ query

as seen on Stack Overflow - Search for 'Stack Overflow'
I have the following subsonic entities TInvoiceHeader TAccountAssociation How can I achieve the following in LINQ (subsonic) SELECT * from TInvoiceHeader WHERE custid IN (SELECT custid FROM TAccountAssociation WHERE username = 'a') I need to bind the results to a GridView. >>> More
Help with Subsonic3 LINQ query

as seen on Stack Overflow - Search for 'Stack Overflow'
I have the following subsonic entities TInvoiceHeader TAccountAssociation How can I achieve the following in LINQ SELECT * from TInvoiceHeader WHERE custid IN (SELECT custid FROM TAccountAssociation WHERE username = 'a') I need to bind the results to a GridView. >>> More
Using constructor to load data in subsonic3?

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm getting an error while trying to load an record through the constructor. The constructor is: public Document(Expression<Func<Document,bool>> expression); and i try to load a single item in like this var x = new Document(f=>f.publicationnumber=="xxx"); publicationnumber isn't… >>> More

Related posts about activerecord

Rails & ActiveRecord: Appending methods to models that inherit from ActiveRecord::Base

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a standard ActiveRecord model with the following: class MyModel < ActiveRecord::Base custom_method :first_field, :second_field end At the moment, that custom_method is picked up by a module sent to ActiveRecord::Base. The functionality basically works, but of course, it attaches itself… >>> More
Rails ActiveRecord - Best way to perform an include?

as seen on Stack Overflow - Search for 'Stack Overflow'
I have three models: class Book < ActiveRecord::Base has_many :collections has_many :users, :through => :collections end class User < ActiveRecord::Base has_many :collections has_many :books, :through => :collections end class Collection < ActiveRecord::Base belongs_to… >>> More
Getting types of the attributes in an ActiveRecord object

as seen on Stack Overflow - Search for 'Stack Overflow'
I would like to know if it is possible to get the types (as known by AR - eg in the migration script and database) programmatically (I know the data exists in there somewhere). For example, I can deal with all the attribute names: ar.attribute_names.each { |name| puts name } .attributes just… >>> More
Changing ActiveRecord attribute value in before_save hook

as seen on Stack Overflow - Search for 'Stack Overflow'
I needed to fix the encoding of an ActiveRecord attribute and decided to do it in a before_save hook. And at this point I noticed an unexpected feature. When I wanted to change the value of the attribute, simple using the attribute_name=XY did not work as I expected. Instead of that I needed to use… >>> More
Conditions with whitespaces in activerecord find

as seen on Stack Overflow - Search for 'Stack Overflow'
So i am trying to do this Order.find :all, :conditions => "org = 'test org'" what ends up firing is SELECT * FROM `orders` WHERE (org = 'test org') the whitespace in the argument gets stripped. what am i missing.. im really stumped here. please help! >>> More