similar to: Sorting with SQL for has_one, belongs_to relationship

A lot has been posted about validation issues with associations, however, I don''t see this issue addressed specifically. ex: class Foo has_one :schedule, :dependent => :destroy validates_presence_of :schedule class Schedule belongs_to :foo validates_presence_of :foo_id this creates a circular dependency that breaks test frameworks like pickle and machinist. At first I was

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

When you define belongs_to in a model, you can either access association or association_id. I was wondering how Rails would handle things if you set each one to be different. I made two simple models: class Foo < ActiveRecord::Base; end class Bar < ActiveRecord::Base belongs_to :foo end Now here''s a script/console session. >> f = Foo.create => #<Foo:0x270ec10

I''m new to ruby and rails and as a result am a bit lost on implementing a one to many relationship. In my DB I have 2 tables contents and locations, contents contains the foreign key location_id. I generated a content and a location model using rails scripts and then edited the models as follows class Content < ActiveRecord::Base has_one :location end class Location <

I am applying Rails to an existing schema and not sure how much the existing developers will let me go in and rename things. So I need to discover the limits of what I can change with Rails. I''ve found set_table_name and set_primary_key, which have been very useful. If I have a "foo has_one :bar" relationship, but then in the bar table my column is named "fooid"

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|

1. I have a few tables: ''users'', ''shops'', ''addresses'', and ''pictures''. 2. Users and Shops will both use the addresses and pictures tables. I have created several mapping tables: addresses_shops pictures_shops addresses_users pictures_users 3. Users CAN have many addresses and pictures (simple HABTM), but... 4.

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,

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

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"

Added column title and made it sortable. Signed-off-by: Scott Seago <sseago at redhat.com> --- src/app/models/pool.rb | 4 +++- src/app/views/user/_grid.rhtml | 2 +- 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/src/app/models/pool.rb b/src/app/models/pool.rb index 0a63723..3c95684 100644 --- a/src/app/models/pool.rb +++ b/src/app/models/pool.rb @@ -57,7

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

Hi I''m new to Rails and I''m struggling with a ''has-one'' relationship. I''m trying to save product and image data in seperate tables with one to one relationship. I''m assuming the problem lies in the controller method below but can''t work it out. The models contain the has_one and belongs to statements, and I tried swapping these

- MODEL - class Document < ActiveRecord::Base has_one :user, :class_name => "User", :foreign_key => "fkey", :conditions => "user = ''NAME''" end - GENERATED SQL (per the .log) - SELECT FIRST 1 * FROM table_name WHERE (table_name.fkey IS NULL AND (user_id = ''NAME'')) What I can''t figure out is

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

I was wondering if anyone could see the error in this littte application I have two models, User and Selection Selection is an extension of the User model so in the User model I have a has_one :selection and in Selection I have a belongs_to :user in my views, i cannot get @user.selection to work but @user works fine. http://www.rafb.net/paste/results/GSBt1e61.html Thanks, r.b

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

I have an AR::Base descendant with a complex object graph beneath it, like so: ArtisanQuoteInput has_one QuoteInput and then QuoteInput has several objects attached to it. Note that the relationship between ArtisanQuoteInput and QuoteInput is polymorphic, so the relationship in A is written has_one :quote_input, :as => :program_quote_input If @artisan_quote_input is an instance of