similar to: Class Table Inheritance implementation

Hi all, I''ll do my best to explain this... I have the possibility to have two customer types in my system: 1. A "mailing list" type: new records are saved when user enters email address in the mailing list subscription form. 2. A "full" type: new records are saved when the user buys something and provides all their billing/shipping details, etc. Model: -

Hello, we have a problem in a CMS project that we believe is basic for RoR developement and could concern others as well - or have already: RoR implements the ''Single Table Inheritance'' (STI) Pattern: http://www.martinfowler.com/eaaCatalog/singleTableInheritance.html .. through its ''ActiveRecord'' ORM. The Fowler example mentions a ''type''

Hi, I''m a newbie in both Ruby and Ruby on Rails. I finished the Ruby on Rail Tutorial on Todo list and it was great. But, now I''m trying to understand the logic behind it, that is something that is not obvious on how each one of them ties together. Is there a flowchart that shows how the inner working of Ruby on Rails? In another words, let''s suppose we consider the

Is there any work being done to add support for defining foreign keys in ActiveRecord Migrations? If not is it something that people would find useful or do most people here believe in the "Application Database" style over the "Integration Database" style [1] as defined by Fowler? I''d love to see support for foreign keys in Migrations. For selfish reasons

So I''m wondering about the origin of "ActiveRecord" and "ActionPack" and the like in Rails. I''ve always thought that perhaps DHH found himself in a suit one day (maybe he had to attend a friend''s wedding or something), and as long as he had the suit on, decided to lapse into a one of the barely lucid frenzies that Marketing people are prone to when

Hi, currently I do some work with polymorphic associations in egde rails class Order < ActiveRecord::Base belongs_to :payment, :polymorphic => true end class CreditCardPayment < Payment end class PayPalPayment < Payment end class Payment < ActiveRecord::Base has_one :order, :as => :payment # common stuff in here end I want to use [Payment] for common functionality

I''m currently coding a system which must store multiple contact methods for a user (phone, email, postal address etc). I''m planning a fairly straightforward inheritance hierachy for these, where each different method inherits from something like a ContactMethod class. The only mention of ActiveRecord support for inheritance I can find in the Wiki and the Agile Web Dev book is

Here''s the text of a quick note I''ve added to the Inheritance wiki page. I''m actually proposing that it would be a good idea to drop automatic single table inheritance and force people to declare it explicitly. There are two reasons for this: 1. Implicitly doing it unnecessarially limits your use of inheritance where you really need it: in your object-oriented

Hi guys, I''ve just been reading Martin Fowler''s article re mock versus stubbing<http://martinfowler.com/articles/mocksArentStubs.html>where he compares traditional TDD testing techniques with mock based testing. I''d be interested in comments from a ruby on rails perspective in terms of this and Mocha? For example: a) Do you see Mocha as a robust way to test Ruby

Hi all, I would like to discuss a design idea I have in mind with you, in order to get critical feedback. ActiveRecord supports single table inheritance(STI) "per se", BUT you must add all possible instance variables(properties) of all subclasses to the "base table"(as columns). I would like to circumvent this restriction. Say we have a class AbstractGenericThing <

I started with Ruby on Rails in the 0.13.x period, so I''m sure I missed out on a lot of history. There''s probably some good explanation for something I''ve been wondering about, but I haven''t seen it written down anywhere. Maybe someone can clue me in. I''ve always felt that one of the uglier APIs was the ActiveRecord::find() method. I call

Hello all, I am working on a app right now that is going to replace a paper form process out client has. This process has quite a few forms (about 30) and different groups of forms (section) need to be filled out based on what information is required from the user. For example, here is a possible process of 2 users: user 1 user 2 Section 1 Section 1 Section 2 Section 2

I''ve been banging my head against this for quite some time and can''t figure out what is going on. I''m doing up a web site based on Typo and adding in some custom controllers. I''m running Typo from trunk, so it''s using the version of rails in vendor/rails. Everything is going smoothly...until now. I have one model that JUST. WON''T. WORK.

So, I''m coding my school project in Rails. There are two models, User and Restaurants. I noticed that in Restaurants, when you use the belongs_to method, you could specify the condition of the associated table. There are a few types of users, in the user_type column of the users table - owners is type 1, users are type 2. So in my haste to hand in enough code, in the Restaurant model,

Hi I''ve been doing this a while now. If I have a class that responds to : [], and all I''m interested in stubbing is that method, then instead of using a mock I just create a hash. (Similarly, you could create an array when you are testing an Enumerable object.) Example from code I just worked on, where uses MigrationGraph#[] looks up graph vertices by name:

Hello, I have a few models -- book, cd, dvd -- for which I''d like to have an abstract base superclass to hold some common stuff. That abstract class, I was thinking, would inherit from ActiveRecord. Didn''t work, though, and looking around, I found this: <http://wiki.rubyonrails.com/rails/pages/HowtoMakeAbstractModel>

Hi, Being new to Rails and Active record could someone please check my database diagram: http://spectrais.com//images/0.png I am building a trouble ticket system for my company. Simply put a client has many users. Those users can create trouble tickets. Each trouble ticket can have many journals that track the progress of the ticket. An employee (of our company) can take ownership of a

Can I get some opinions on which free DB to use with rails for a virtual server that will eventually be doing lots of heavy database lifting? Not a lot of heavy duty querying per se. Think multiple simultaneous forums and blog sites and the like. I know each of the different DB possibilities such as MySQL and PostgreSQL has plus points and minus points. I''m particularly interested

Hi All, I wonder if there should be one character for quote= in read.table, i.e., > args(read.table) function (file, header = FALSE, sep = "", quote = "\"'", dec = ".", ... I have a file containing the following lines, 08248-GOTERM 3'-phosphoadenosine 5'-phosphosulfate biosynthetic process 08279-GOTERM 3'-phosphoadenosine

Hi I get this mailing-list as a digest (as everyone does, i guess). This is quite inconvinient for answering single questions.. I every digest there is a message with Subject: Re: Samba dingest <NR>... This makes it hard to keep track about whath message the replay is ment for. Another problem is, that mime-attachments don?t seem to work. This is especially bad, because some Microsoft