similar to: Advanced has_many and belongs_to model joins ?

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,

I''ve seen http://railscasts.com/episodes/73-complex-forms-part-1, part2 and part3. It seems to be my case. I have: Company has_many :documents has_many :tenders, :through.......... and Document belongs_to :company Tender has_many :companies, :through.......... I want to insert documents and tenerds on company creation. If documents are more than one the user can click "add

Hi, I have a model tests_user and score which are associated with each other by has_one and belongs_to association. class TestsUser < ActiveRecord::Base has_one :score, :foreign_key => :reg_no end class TestsUser < ActiveRecord::Base belongs_to :tests_user, :foreign_key => :reg_no end where reg_no is a unique field in both the table! score = Score.find(:first) gives me

Hi Gurus, I wanted to add siteadmin user(basically a user with a certain role) while creating the site itself. I hope that i have done all the necessary stuff by going through raynb''s railscasts ( http://railscasts.com/episodes/196-nested-model-form-part-1) But could not see user fields being displayed in the site creation form.. Below are the details. I Have two model users and

Hello, I''m having some trouble with forms, my app allows to enter data by using a multi-step form that has 7 steps. There are 3 steps that may let the user to add 1 form, for example there''s a step called "children" and that children has the following fields: * name * age * gender but one father may have more than 1 child and I''m adding another form with

Hi everybody, I am very new in Ruby on Rails. I install ruby(1.9.2p180) and Rails(3.1.3). Also I install RubyMine3.1.1 as IDE. I successfully have done some simple simple practices. Now I want to play with database(mysql).Though I have checked so some of the URLs but unable to make out. Please help me how to do that, what files or folders should I place and where should I place those.

Please Im trying to create an application where i can post like twitter, but i was the users name to be posted under their respective posts My Post_controller looks like this def index @posts = Post.all(:order => "created_at DESC") @users = User.find(:all) #@user_id = current_user.find(params[:id]) respond_to do |format| format.html end end def create

I am looking for a little assistance with a problem I have with a simple table join using Rails. I am a relative newbie to both Ruby and Rails so any help would be greatly appreciated . I have two tables products and product_formats. create table products ( id int not null auto_increment, title varchar(100) not null, product_format_id integer

I am a bit confused about counter_cache here. The API docs http://api.rubyonrails.org/classes/ActiveRecord/Associations/ClassMethods.html say that only the belongs_to association can take the :counter_cache option. When I try to use it on a has_many I get an "unknown key(s): counter_cache" error. Why would this be the case? belongs_to means that this model has a field with an id

I have users who belong to a group. I also have a room that belongs to a group. I want to use a has_many through association to link the room and the users as such: class Room < ActiveRecord::Base belongs_to :group has_many :users, :through => :group end The SQL generated for the search is incorrect: SELECT users.* FROM users INNER JOIN group ON users.group_id = groups.id WHERE

I have the following 3 models (2 models joined by an intermediate): 1. class Exercise < ActiveRecord::Base 2. has_many :routines, :class_name=>''RoutineExercise'' 3. end 1. class Routine < ActiveRecord::Base 2. has_many :exercises, 3. :class_name=>''RoutineExercise'', 4. :order=>''position'' 5. end 1. class

Hi All, Probably this has been asked numerous times, I apologize already! Can somebody point me to a good tutorial on how Rails works with relations? I know about database design and normalization, I also know about programming in general (and OOP for that matter). Only thing I can say is that I''m following the "Four days on Rails" tutorial by John McCreesh. He writes

I have a relationship where a Show has_many Techs through People. From what I understand that requires me to put belongs_to Show in the People model. My problem is that a Tech can belong to many Shows. Is there any way of solving this besides putting a has_many Shows relationship in People -- Posted via http://www.ruby-forum.com/.

I have a problem that surfaced in my attempt to upgrade my application to Rails 1.1. We have a STI model on the "belongs_to" side of a has_many/belongs_to relationship. All my unit tests for this model pass, and the relationships all seem to work fine. But in my functional tests, I''m getting errors. I''ve traced it back into the call to the has_many

I have a bit of code in a controller that looks like this: @current_festival.monitor_preferences.each do |pref| if pref.user_id == @me.id pref.preference = params[:monitor_pref] #pref.save end end @current_festival.save_with_validation(false) the Festival class has_many :monitor_preferences the MonitorPreference class belongs_to :festival In the configuration above, the

Hi, Let''s say I''ve the following Models and their relative associations: Seat ---- belongs_to :booking Booking ------- has_many :seats has_many :debits, :as => :chargeable Debits ------ belongs_to :chargeable, :polymorphic => true Why >> seat.booking.debits nil while >> Booking.find(seat.booking_id).debits [] ? Thanks. Cheers, Marco

Hi, I am trying to use ActiveLdap for authentication in my rails app. But I am running into a problem with the "belongs_to" and "has_many" associations. Here ist how my models look like. class Person < ActiveLdap::Base ldap_mapping :dn_attribute => "uid", :prefix => "ou=People", :classes =>

I have 2 models SmsAddress & OutboundSmsAtom SmsAddress { has_many :other_objects, :dependency => :nullify } OutboundSmsAtom { #note this object also "belongs_to" other objects if that matters belongs_to :this_object } Whenever I try to destroy an object of type ThisObject, which at the time has 0 "children" OtherObjects I get the following type of

I know this has been rehashed many times, but I don''t get it. I can''t find it documented to were I understand all the parts. I can make this work using Rails database design conventions, but in this case I am not able to do that. I find examples, but the ones I find do not follow the conventions. They also do not give enough information to understand what is going on. In

I''ve got a User class and an Employer class set up as follows: User.rb: has_many :employers Employer.rb belongs_to :user My tables are as follows: mysql> select id,first_name,last_name from users limit 5; +-----+------------+-----------+ | id | first_name | last_name | +-----+------------+-----------+ | 711 | Patrick | Stewart | | 714 | Larry | Davis | mysql>