similar to: has_many questions

I''m having a lot of trouble with has_many, :through and could really use some assistance. I''ve got a User and Group class. Users can subscribe to groups, and groups should know who''s subscribed. I''ve got a join table (group_subscriptions) with group_id, user_id, and it''s own id element. Users has "has_many :groups, :through =>

In AWDWR David says (pg 232), "When a Join Wants to Be a Model: While a many-to-many relation with attributes can often seem like the obvious choice, it?s often a mirage for a missing domain model. When it is, it can be advantageous to convert this relationship into a real model and decorate it with a richer set of behavior. This lets you accompany the data with methods. As an example,

I have 3 models that define members, groups and the subscriptions: Member, Group, and GroupMember. class Member < ActiveRecord::Base > has_many :group_subscriptions, class_name: "GroupMember" > has_many :groups, through: :group_subscriptions > attr_accessible :email, :password > end > class Group < ActiveRecord::Base > has_many :member_subscriptions,

Has anyone who is running OS X 10.4.5 and the security patches thereafter noticed that WEBrick is no longer functioning? I have a machine at school that I believe to be patched with 10.4.5 but not with the latest security patch and WEBrick seems to run fine for it. However, on my machine at home I can''t get WEBrick to successfully run even freshly generated apps. For both

Can anyone tell me why I''m getting the error "The error occured while evaluating nil.id_before_type_cast" for the following view code <% for entry in participant_portfolio.portfolio_entries -%> <%= select "entry[]" , :id, @buyer_profiles, :selected => entry.buyer_profile_id %> <% end -%> This seems to only happen when I use

Hi there, I''m working on a new student portal system using Rails for a large university. As part of this application, I plan on students being able to customize their own calendar, collection of commonly used links, aggregation of newsfeeds (from the university, student groups, etc), and to see a listing of major announcements they should be aware of. It seems to me, to make the most

Hi all, My question is somewhat complicated, but bear with me. My project has a number of models: User, Program, and Team. Users belong to multiple Programs. Programs have multiple teams, but Teams belong to one program. For each Program a User belongs to, he can belong to multiple Teams. (Think of this in an athletic context where users are athletes, programs are universities). So my

Didn''t have quite enough space to describe it there...basically i''m having a problem with the :uniq option in my tags. I''m using acts_as_taggable_on_steroid which adds these associations to my Resource class: Resource has_many :taggings, :as => :taggable, :dependent => :destroy, :include => :tag has_many :tags, :through => :taggings, :uniq => true

I see from http://rubyonrails.org/api/classes/ActionController/Components.html that is possible to pass paramaters to a component. I don''t understand the exact syntax. I''m trying: @master_id = @params[''master_id''] in the components controller but it is not working. ==== Details: In my calling view I have: <%= h(@opportunity.id) %> <div

First the data model: class Forum < ActiveRecord::Base has_many :topics, :dependent => :destroy, :order => ''created_at desc'' end class User < ActiveRecord::Base has_many :topics, :dependent => :destroy has_many :comments, :dependent => :destroy has_many :replies, :dependent => :destroy end class Topic < ActiveRecord::Base belongs_to

Hi everyone. Ive part of a project that I need to refactor, and im having some difficultly deciding which path to take. Perhaps someone can help, I think its primarily a design question. A Spec consists of many Nests and many Parts. Nests contain Parts. Here''s what I have, which works well currently: --------------------------------------------------- class Spec <<

I''ve got a User model and a Book model. A user is required to submit books each month to be reviewed by other users. I have the following relationships defined: # the join model book_review.rb belongs_to :user belongs_to :book end book.rb # each book is reviewed by many users. This allows us to get the BookReview # objects associated with this book has_many :book_reviews,

Josh Susser tells in his blog that the opposite direction of polymorphic will get into trouble together with has_many through. This is the url: http://blog.hasmanythrough.com/articles/2006/04/03/polymorphic-through I do that according to Josh Susser''s procedure: class Tagging < ActiveRecord::Base belongs_to :tag belongs_to :taggable, :polymorphic => true belongs_to

Hi everyone. I''ve made a default change to has_many :through associations that I felt was important to make before they''re released. This is after some tickets and confusion I''ve seen regarding has_many :through. class Connection < ActiveRecord::Base belongs_to :user belongs_to :channel end class Channel < ActiveRecord::Base has_many :connections

I''ve been reading up in ActiveRecord::Associations and playing around with my app via the console and found some interesting methods via the code completion of IRB, but I have no idea how to use them and can only find one hint in the API http://api.rubyonrails.com/classes/ActiveRecord/Associations/ ClassMethods.html It mentions here in the has many associations that if you use the

It seems that using a join model that joins with two has_many''s will fail to generate proper SQL class StudentSemesterRecord < ActiveRecord::Base belongs_to :semester has_many :discipline_records, :through => :semester end class Semester < ActiveRecord::Base has_many :student_semester_records has_many :discipline_records end class DisciplineRecord <

Hi, I am very confused about an aspect of has_one and has_many relations, with regard to using the build method, and saving the belongs_to side. It''s a somewhat long post. so please bear with me :) First let''s consider the has_one scenario. Let''s say I have a student who must own exactly one car: class Student has_one(:car) end class Car belongs_to(:student)

Hi all, I''m having some trouble with a has_many association on a table using the single table inheritance model that I''m hoping someone can help me with. The schema for the table is: CREATE TABLE `comments` ( `id` int(11) NOT NULL auto_increment, `user_id` int(11) default NULL, `type` varchar(20) NOT NULL default '''', `type_id` int(11) NOT NULL default

Hi, I am working on a scheduling app and I have a perpelextion (new word). I am wondering if the problem is my data model I have Users. Users can create Events. Users can be invited to Events created by other Users. So... user.rb class User < ActiveRecord::Base has_many :invitations # invitations to other users'' events has_many :events, :through => :invitations # all events

I am search for a nice tidy solution to the following or if only to talk the problem out aloud. I have three tables products has_many :pricings pricings belongs_to :product belongs_to :pricing_group pricing_groups had_many :pricings I would like to have a single page where I can add/edit a product and on the same page administer the pricing for that product for each pricing group.