similar to: inverse_of not supported in Rails 3 for has_many?

This feels more like a question to ask the core list, forgive me if I trespass. I''ve been trying to help one of my cow orkers get through a sticky problem. He''s got a fairly complex nested form to update a model and its children. He''s started adding some validations, and we''ve encountered a number of issues: First he had a validation on one of the child

I''m willing to write a patch for this issue: https://github.com/rails/rails/issues/8893 But want to confirm that the new behavior makes sense before I make the effort. Essentially if you have an unsaved parent and child, and the parent''s association to the child has an inverse_of declared on it. When the parent gets saved, it updates the foreign key on the child, and this

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)

Here is my simple example... require ''rubygems'' require ''active_record'' ActiveRecord::Base.establish_connection :adapter => "sqlite3", :database => "has_many_through.db" ActiveRecord::Schema.define do create_table "containers", :force => true do |t| t.column :name, :string end create_table "shapes",

hi, I found a bug in ActiveRecord association SQL INNER JOIN codes. in has_many, has_one, habtm and belongs_to queries the foreign key is determined from the table name of reflection and self. but that''s worng because if you use a global prefix or suffix for your tables the foreign keys will be in format of PREFIX_CLASSNAME_SUFFIX_id which is wrong, because it breaks the advantage of

The below query fails: Timesheet.joins(:time_entries).select("timesheets.*, sum(time_entries.worktime) as total").group("timesheets.start_date") The models have the following relations: Timesheet < AR has_many :activities, dependent: :destroy, inverse_of: :timesheet has_many :time_entries, through: :activities accepts_nested_attributes_for :activities,

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

While I''m happy to continue talking about the vagaries of Rails deployments, I also need to actually build apps. :) I may have discovered a bit of a problem with :include as it applies to has_one associations. First, let me say that I''m a big fan of :include for reducing the number of SQL calls. There are times when I wish it could go more than 1 step away from the parent

Heya everyone! I am quite new to Rails and I am reading AWDwR. I am at Task E "Check Out!". I understand it quite well, but I have a problem with the last playground exercise: Add a Table which contains the payment types. All goes well, but I am not sure whether I should use has_many or has_one(as in the Playground wiki at http://wiki.pragprog.com/cgi-bin/wiki.cgi/PT-E-3). I use the

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I''m having a difficult time wrapping my head around a set of models and their associations and seeing how they map into Rails. I''ll try to lay out my problem using the has_many and belongs_to structures. I have a RuleSpace, a Rule, and a Subject. A RuleSpace has_many Rules A RulesSpace has_many Subjects through Rules A Rule belongs_to (many) RuleSpaces A Rule has_many

I have the following models: class Card < ActiveRecord::Base belongs_to :deck belongs_to :front, :polymorphic => true belongs_to :back, :polymorphic => true end class TextContent < ActiveRecord::Base has_one :card, :as => :front has_one :card, :as => :back end The conflicting has_one declarations don''t work. What I need is

Hey Guys, I''m getting a peculiar bug working with Observers and has_one associations. When a has_one association is invoked by an Observer it always returns null. I looked in the development.log file and the SQL for the has_one association isn''t even being executed. On the other hand, when I replace the has_one association with just a hand crafted method, it does get called

Not sure if this is expected or not. Only happened with a has_one :through I had setup. (Workaround is just to remove it and go through the association manually vs has_one ..., through: .) Not a big deal if no one has time to look at it, as it''s not a big enough deal to look into a fix on our side. In Rails (3.2.9) console if I do: MyModel.reflections.each {|name,reflection|

Hello, please have a look at this: My tables: create_table :languages do |t| t.column :name, :string, :limit => 3 t.column :title, :string, :limit => 30 end create_table :categories do |t| t.column :category_id, :integer (3.) t.column :created_at, :timestamp t.column :updated_at, :timestamp end create_table :categorytranslations, :id

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

Acts as automatic has two purposes: 1) provide acts_as_automatic act, which will automatically run the appropriate methods when conventions are adhered to (e.g. if you have category_id, it will assume that the model belongs_to :category). Only belongs_to via something_id is currently implemented. 2) Allow the creation of associations.yml, which will hold associations instead of inside each

class Ladder < ActiveRecord::Base has_many :players has_many :users, :through => :players end class Player < ActiveRecord::Base belongs_to :users belongs_to :ladders end class User < ActiveRecord::Base has_many :players has_many :ladders, :through => :players end When I try the following code (on the console) I get an error: @ladder = Ladder.find(1) @ladder.users I

I am trying to create an association table using the ":through" option in "has_many" but not having success. I have created the necessary migrations of the association tables and run rake db:migrate I have the following model: class Group < ActiveRecord::Base has_many :users, :through => :group_user has_many :invites, :through => :group_invite, :class_name =>

I am having a problem with using SIngle Table Inheritance with a has_one relationship, and I am at a loss of what could be causing it. Below is the related code and the error message. class User < ActiveRecord::Base has_one :wishlist end class List < ActiveRecord::Base belongs_to :user end class Wishlist < List has_and_belongs_to_many :items, :class_name =>