similar to: where can i find a good tutorial for has_one and belongs_to?

Hi. My model data is the following: - Place - User - Checkin Instead of having a Checkin that belongs to both User and Place, I chose to add another model, Program, that allows to list all the places a user can checkin into, and also hide the checkins he''s no longer involved in (= the user sign out of a specific program). That give me crazy relationships: Program has_many Checkin

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''ve been using this sort helper to have sortable tables. http://wiki.rubyonrails.com/rails/pages/Sort+Helper I''ve encountered a situation where I need to sort a column that is not part of a table, but it''s related table. For example, say I have db tables called foos and bars. Foos have fields called name and title. And bars have fields called note and foo_id. Foos

I have two models (Car and Driver) and a combobox to select which driver belongs to which car. I want the combobox just show the objects that have not yet been associated. # vehicle belongs_to: driver # driver has_one: vehicle # simple_form # vehicle/_form.html.haml = f.association: driver, label_method: :name, value_method: :id How to ensure validation before saving, to avoid problems of

How can I save two models that have has_one and belongs_to relationship to each other? I want to save both the models by using script/console. TIA. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to

So, I have 2 models A and B that share 5 common attributes and all other attributes are different. So I wanted to extract these 5 out into one common table and use has_one, belongs_to to knit it back together. So now there are 3 tables with 1 having the shared properties, we''ll call this table C. Table A id dollar_amount Table B id quantity_on_hand Table C id version My question is,

I have two models called entity and user. The entities table has a column called users_id that contains the user id of the user that created the entity. In entity I have... has_one :user ... as I want to be able to show the user who created the entity from the entity object. But this produces the following error... Mysql::Error: #42S22Unknown column ''users.entity_id'' in

With a has_one/belongs_to relationship, what''s the best way to guarantee that the belongs_to object gets created and is accessible alongside the has_one object? I *think* the after_create callback is a good choice, but I discovered an oddity while trying it. F''rinstance, if every horse has a carriage: ============ ActiveRecord::Schema.define do create_table(:horses) {|t|

Let me preface by saying i''m a total noob at ruby/rails. :-) For some reason, I am just not grasping the concept of has_one & belongs_to... I''m working on a project that includes user authentication, and 3 different types of user profiles. User profiles are either "fan", "band", or "venue" objects, and user logins are "user"

I have two objects, QuoteInput and Insured. QuoteInput has one Insured and Insured belongs to QuoteInput. I don''t understand what I''m seeing. I assign an Insured to a QuoteInput. The Insured object has invalid data. I call save! on the quote input. QuoteInput has no validations. I expect two things to happen - 1) an exception should be thrown, indicating that there was a

There really doesn''t seem to be a *declarative* way to define a default value for belongs_to and has_one associations class Person < ActiveRecord::Base belongs_to :address end p = Person.new p.address.city = ''Atlantis'' # Bummer! Of course, there''s an easy way to avoid this class Person < ActiveRecord::Base belongs_to :address

Sorry to post a C compile error on this mailing list but this is Asterisk related. Basically, I was following http://www.plack.net/index.php/2007/01/07/asterisk_modification_for_queu e_logging to patch logger.c and Makefile in Asterisk 1.4.* in order to write queue_log to mySQL database. When I ran make, it complained: In function `write_mysql_logger': [...]

Does anyone know a good authentication tutorial they can suggest? I''ve tried several restful authentication ones and an authlogic one on RailsCast. But with each one I try, something seems to be missing in the tutorial and I can''t get it to work. I''m new to Rails so it''s possible user error on my part. I''m on Mac OS X 10.5 and I generate all my apps in

Hi, friends It is described at this page: http://superuser.com/questions/195275/usb-boot-no-default-or-ui-configuration-directive-found <http://superuser.com/questions/195275/usb-boot-no-default-or-ui-configuration-directive-found>help, thanks! -- regards chenge

I messed around with Rails for a while last year, but then got busy and had to drop it. However, I now have time again, so I''m starting to play around with a simple database schema to model my extensive collection of photographic material, including equipment, negatives, photographs, etc. I''m running into an issue with using belongs_to/has_one methods. Read on for an

Hi all I have followed this tute: http://hivelogic.com/articles/2005/12/01/ruby_rails_lighttpd_mysql_tiger to get rails running and all is fine except for getting: undefined method `redirect_to'' when I load my test page. I have the following in my xx.rhtml: <%= select :group, :user_id, find_all_groups, {}, {:onclick => select_group, :size => find_all_groups.size + 1}

I performed a gem install feedtools, I then added these 2 lines to my environment.rb: require ''rubygems'' require ''feed_tools'' I then added this method in my controller: def rss @post = Post.most_recent feed = FeedTools::Feed.new feed.title = ''Recent Rambles'' feed.subtitle = ''random thoughts by me''

I''ve posted a different question just before -- but before I can try and get a better idea of my error message, I was trying to start my application and ran into other problems. My application was developed last year in rails 1.2.3. I since upgraded my computer and have the latest version of rails. When I tried to star the application I got the following error message:

Looks like Rails 1.1.0 RC1 is finally here: http://dev.rubyonrails.org/changeset/4010 -- Posted via http://www.ruby-forum.com/.

Hello list, I''m having a problem getting Gruff working with Rails on a Windows XP box. I installed RMagick, then Gruff via the win32 gem, and it seemed to go OK. From irb, I can do the following - require ''rubygems'' ##### This returns ''false'', but seems to work OK - require ''gruff'' ####### Ditto - g = Gruff::Bar.new etc., and I get