similar to: REST - Implementing HABTM in the real world

Let''s say I have the model class Reader and Magazine, connected by join model Subscription. It looks something like this class Reader < ActiveRecord::Base has_many :subscriptions, :dependent => :delete_all has_many :magazines, :through => :subscriptions validates_presence_of :name end class Magazine < ActiveRecord::Base has_many :subscriptions, :dependent =>

Hello, After listening to DHH''s 2006 RailsConf keynote, I decided to take a leap on my current application and do a little more re-organizing to make it more CRUD-based. As such, I ended up changing some things around to get this (simplified): User has_many :enrollments, :conditions => ''status > 0'' User has_many :schools, :through => :enrollments User has_many

Hello, I have a has_and_belongs_to_many relationship that I''ve realized I need to add additional attributes to. So I''m converting it to a has_many :through (HMT) relationship. This is the first time I''ve used an HMT, and it seems like I''m using too much code. I couldn''t figure out how to get the join model objects to update automatically as a result of

I have the following: Posts belong to a User Posts may be Monitored by many Users How do you characterize this? class Post < ActiveRecord::Base belongs_to :user has_many :monitors class Monitor < ActiveRecord::Base has_many :posts, :as => user class User < ActiveRecord::Base has_many :posts # when a user *does* a post belongs_to :monitor, :polymorphic => true --

This has me scratching my head: a Person has many Things a Person has many Collections a Collection has many Things ...Things in a Collection are ordered ...Things in a Collection can be related to (created by) any User ...a collection has additional attributes, such as a name etc I am confused about habtm in rails (especially when using acts_as_habtm_list) vs. going the :through route.

Ok, David says on page 241 that sometimes a many-to-many relation with attributes are better implemented as an actual model instead of using HABTM. Well, I''ve got that situation and I can''t figure it out. All of the examples in the book have HABTM examples between 2 different tables, but I want to have a HABTM relation on 1 table with itself. (e.g., if I have a table Things,

Hello all, I''m trying to create a HABTM checkbox action that adds/updates ''users'' to a ''project''. I have the following laid out. --------------------- TABLES --------------------- create_table "assignments", :id => false, :force => true do |t| t.column "project_id", :integer, :default => 0, :null => false

Hello all This is my first post so excuse the basic question. (and any repeats I just got an email saying this post was too big so I have re-submitted a smaller version) I was following the thread on http://lists.rubyonrails.org/pipermail/rails/2006-May/038988.html regarding the STI on HABTM for RoR. I have a very similar problem and was hoping for some help. I have the

I have a large certifications table that I would like to have a little more controll over, it is part of a HABTM relationship. ----------------------------------- db''s (simplified) >certifications id course >employees id department_id type_id name >departments id name >types id kind >certifications_employees certification_id employee_id

Hi, I posted yesterday asking how to get form tags to reference the associated objects in a habtm relationship. I was hoping for Rails Magic, but it looks like Rails doesn''t have habtm magic beyond a certain point. Here was my solution for others who might have the problem. Also, I hope someone shows me that there is a simpler way. The Database Model: class Registration <

All: I have been working on making a self-referential habtm relationship that uses a join model because I want to store info about the relationship. I have been using two sections from Chad Fowler''s "Rails Recipes" as a guide, "Self-referential Many-to-Many Relationships" and "Many to Many Relationships Where the Relationship Itself has Data". So far I have

Hi, I''ve been breaking my head over this thing with no success. Here is my table layout - class User < AR has_many :memberships has_many :groups, :through => :memberships ... class Group < AR has_many :memberships has_many :users, :through => :memberships ... class Membership < AR belongs_to :user, :class_name => "User", :foreign_key =>

Hello All, I am new to ROR, and can''t seem to get HABTM to cooperate entirely... however I might be abusing it! Before I try a different strategy I thought I''d ask here and see if I''m missing something simple. So say Projects and Companies are related. Projects can have multiple Companies, and Companies can be on multiple Projects. But, the same Company can also

Hi all, I need to model simple typed polymorphic relations: ''John'' [''works_for''] ''Bill'' ''John'' [''speaks_for''] ''Microsoft'' ''Microsoft'' [''hold_shares_of''] ''Apple'' I''m having a hard time combining : - S.T.I.

Hi, I''m currently stuck with a problem I just can''t find a clever solution for. I checked every tutorial, issuetracker, API reference I could find but found nothing to "enlighten" me --> I desperately need your help :-). My Question is: is it possible to use nested forms for habtm associations? --> Here some more info about what I wanted to do and what failed

All, If I have a table that has several discrete fields that all point to the same associated field, how do I model it. Specifically, If I have a project table that has 2 fields: specifying_company, and responsible_company. And one table of associated companies, how do I do the :belongs_to / :has_many stuff ie. For a given project company A may be writing the spec, but company B may be paying

Greetings. First, this example is just my way of exploring :through. It probably doesn''t need has_many :through, and could just use a standard HABTM association. Here''s the models: class CourseRequisite < ActiveRecord::Base belongs_to :requisite, :class_name => ''Course'', :foreign_key => ''requisite_id'' belongs_to :course,

HI, i use models User and Groups connected with many to many association, so i have users table, groups and groups_users. lets say i create one user and one group. next i add a group to user. so now my table groups_users has one entry i.e. group_id | user_id _________|________ 1 | 1 ok, when i delete both my group and user, above entry is not deleted, thus leaving alone without

I''ve just been bodyslammed by a problem with has_and_belongs_to_many - as far as I can tell, if it doesn''t appear at the top of other relationship definitions it doesn''t seem to work right. For example: class Artist < ActiveRecord::Base has_and_belongs_to_many :genres has_many :albums has_many :videos has_many :cds has_many :collections end ..works fine

Hi all, In my app I would like to create user groups in my admin. Currently I have the following models and associations that facilitate this. class User < ActiveRecord::Base has_many :memberships has_many :groups, :through => :memberships end class Membership < ActiveRecord::Base belongs_to :group belongs_to :user end class Group < ActiveRecord::Base has_many