similar to: has_many :through question

hallo everybody, i already googled the following problem, but there are so many questions regarding "has_many :through", that i just couldn''t find what i was looking for. so, i''m really sorry if this has been asked before. if so, just drop me the link. i have a has_many :through relationship similar to the following example: class Group < ActiveRecord::Base

Hi I''ve noticed ActiveRecord::Base::has_many fails for String arguments. The following code works when all arguments to the ActiveRecord::Base::has_many calls are Symbols: class Country < ActiveRecord::Base has_many :country_products, :dependent => true has_many :products, :through => :country_products end ruby script/console >> Country.find_all.first.products

Hey guys & ladies! I''ve got the following relationship which i''m trying to get accepts_nested_attributes to work with. But when i submit my form, it looks as if its expecting a Company object, rather than an array of companies. which really doesn''t make sense considering its a has_many :relationship. So what i''m after, is a way to

class Host < ActiveRecord::Base belongs_to :person end class House < ActiveRecord::Base has_many :people, :dependent => true has_many :hosts, :through => :person end class Person < ActiveRecord::Base belongs_to :house has_many :hosts, :dependent => true end Now when I try to do: @hosts = House.find_by_id(params[:namas]).hosts from my controller I get this:

Hope someone can tell me what''s up, because this has me baffled. I have an Image model, and a Provider model. Both are defined as "has_and_belongs_to_many" relating to each other. In my image form partial, I have a bit of AJAX generating the provider_ids array dynamically from a provider AJAX search on the same page. So for example, each time I click on a provider name that

Most times I look up a list of books I want to know a page reference for each one, so the views that display booklists expect an array of two-element arrays, constructed via a method in the model like so: (class Category) def book @book = Array.new self.bookshelves.each { |x| @book << [x.book, x.pages] } return @book end When I get the list of all books that a user has

Hi Just curious if anyone can explain why using a dynamic find fails to work with << operator I have standard habtm relationship class User < ActiveRecord::Base has_and_belongs_to_many :roles Now when I assign a Role via << after saving the new User I get wierd behaviour but only when using the dynamic version of find i.e @user = User.new(p) if @user.save #

Hi, I have a self-referential has_many :through relationship setup to track relationships between users. Basically relationships are modeled as a join table with an extra column ''relation''. create table relationships ( user_id integer unsigned not null, friend_id integer unsigned not null, relation char(1) not null, ) --- relations --- f = friend r = request to

So I have this structure. class Gallery < ActiveRecord::Base belongs_to :owner, :polymorphic => true has_many :folders, :order => ''slug'', :dependent => :destroy class Folder < ActiveRecord::Base has_many :photos, :dependent => :destroy, :conditions => "parent_id IS NULL" belongs_to :gallery class User < ActiveRecord::Base has_one

In my continued efforts to port my rails 1.x app to Rails 2.1.2, I keep running into what appear to be ActiveRecord bugs. I am using an :include on a :has_many definition: class Request < ActiveRecord::Base has_many :service_types, :order=>''service_types.id ASC'', :include=>:service_response [...] There''s no reason this wouldn''t be supported in

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 =>

Hi all ! I''ve written a Character model, each character has many Attributes. My schema.rb looks like this: create_table "characters", :force => true do |t| t.string "first_name" t.string "last_name" t.integer "user_id" t.datetime "created_at" t.datetime "updated_at" end create_table "attributes",

I have two classes: a Widget and a User. The User has an id that is referenced in two places on the Widget: owner_id and operator_id. How should I structure that reference for has_many? Thanks folks - I appreciate any help on this. --David --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails:

Hi I get a following error: ActiveRecord::AssociationTypeMismatch in Cmdb#create ConfigurationItemAttributeValue expected, got Array RAILS_ROOT: ./script/../config/.. Application Trace | Framework Trace | Full Trace c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.13.2/lib/active_record/associations/association_collection.rb:128:in `raise_on_type_mismatch''

Hello, Is there a way to implement a callback for somehting like before_add and after_ad on a statement like this with a has_many relation? x.children << Item.create(:title=>"test") I want that x has a callback that is called when the item is added. I found something in

Hello All, I''ve run into a snag. (I apologize in advance. I''m not very good at system administration.) I''m building an app that allows users to upload files. Up until now I have been storing the files on the file system, but tonight I decided to change the app so the files are stored in the database as a longblob. I thought everything was working great, until I

Any idees why I can do this: @sum = @selected.inject(0) { |sum, player| sum + player.value } but not this: @sum = @selected.sum { |player| player.value } @sum = @selected.sum(&:value) The last two give me following error: wrong number of arguments (1 for 2) /Library/Ruby/Gems/1.8/gems/activerecord-2.0.2/lib/active_record/associations/association_collection.rb:164:in `calculate''

I have the requirement to empty the association records and add the association records as new (as below). @task = Task.find(params[:task_id]) @task.task_users = [] params[:ids].split(", ").each do |court_user_id| task_user = TaskUser.new(:court_user_id => court_user_id) @task.task_users << task_user end @task.save This is not working. Following error is thrown.

I''ve been stumped on this for a few days and I''m not sure if it''s an error on my end or an actual bug. I have a system where I have workshops and users. Workshops have students, presenters, and troubleshooters. I wanted to represent this simply by using has_many :through with :source. Workshop has_many :presenters, :through =>:presenterships, :source=>:user

Hey all, I''m using a simple search function. It''s working great except for foreign keys. I have one table pets (id,name,owner_id) and another table people(id,name) owner_id being a foreign key of pet pointing to people name. here it is on the pet controller: @paginator, @pets= paginate(:pets, :conditions =>["name OR owner_id like