similar to: polymorphic assoc seems only best for multiple parents ?

Hi, seem to keep running into a wall here. I can''t find any resources on site navigation that can deal with any model being in the nav, allow nesting, and can dynamically update. So I thought about it for a while, and decided on a MenuItems class, which contained the position of the child in relation to it''s siblings, where the parent and the child were polymorphic. Then a given

Hello, is it possible to setup a model/table schema like this: Groupable --> Membership <-- Group ^ ^ | | User UserGroup I tried the following but failed: Groupable (table with ''type'' column) has_many :memberships, :as => :groupable has_many :groups, :through => :memberships

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

Hi there- I''m a newbie to this board, RoR, and web development in general. So please forgive me if this is in the wrong place or if the solution is really simple... I''m trying to conceptualize the relationships between a series of models for a page creation function. What I''d like is to have a Content Page which consists of a series of Content Blocks. The Content

I''ve read the stuff about polymorphic associations here: http://wiki.rubyonrails.org/rails/pages/UnderstandingPolymorphicAssociations But I''m not sure what exactly they are and what their advantage is. Are they the same as HABTM, but they''re "two-way"? Joe -- Posted via http://www.ruby-forum.com/.

Hi, lets say I have a a table, "Linkings" that I am using for polymorphic associations. One of the associations is to the "person" table, and there are several other associations. "Person" has 2 types, "slacker" and "suckup". It is modelled as such: class Linking < ActiveRecord::Base belongs_to :person belongs_to :linkable, :polymorphic

I have 3 models . Doctor, Patient and User with following associations class Doctor < ActiveRecord::Base has_many :patients, :dependent => :destroy has_one :user, :as => :userable accepts_nested_attributes_for :user end class Patient < ActiveRecord::Base belongs_to :doctor has_one :user, :as => :userable accepts_nested_attributes_for :user end class User <

Hi, Why is it that polymorphic associations only work with the :has_many and :belongs_to relationships? Why can''t it be a :has_one? Matt

Consider the following: class Event belongs_to :event_object, :polymorphic => true end class Asset < ActiveRecord::Base end class EventedAsset < Asset has_one :event, :as => :event_object end EventedAsset.find(:first).event generates the following SQL: SELECT * FROM `events` WHERE (events.event_object_id = 1 AND events.event_object_type = ''Asset'') LIMIT 1

The setup: class Location::Base < ActiveRecord::Base set_table_name :locations ... end class Location::Address < Location::Base ... end class Location::Airport < Location::Base ... end class Person < ActiveRecord::Base belongs_to :location, :polymorphic => true, :class_name => "Location::Base" ... end I want a unidirectional belongs_to relationship. That

Hello, I''m just starting out with both Rails and Ruby, so I hope this isn''t too simple of a question - but I''ve been struggling to find a solution. I''m using the file_column plugin to handle image uploads and thumbnail generation. In addition, I''ve wrapped the image into a polymorphic table so I can have uploaded images associated with multiple

Hello, I am not sure of the best way to model this situation in Rails and would appreciate some guidance. An order can hold multiple line items. Each line item is for a certain number of any given product. There are four products, each in a different table because they have completely different attributes. So I have: Order - has many LineItems LineItem - belongs to an Order

Hello, I have a scenario where I want to save a author image and book image to assets table... I am using a polymorphic association. And author_name is inside the books table. now when I save the image the imageable_type says "Book" for both. And off-course it''s a correct behavior, but I am just trying to figure out is there any way where I can save author image and

I am very confused about where to put the belongs_to and the has_one (and other relationship identifiers). I have read the RDoc and the agile book many times about this and I think i still see it backwards. Let me outline my app so you have an understanding... I have 2 tables: Schools { id, school_name, address_id } and Addresses { street1, street2, city, state, zip, country } *** this

I''m trying to figure out the Rails way to model the following problem: I have 2 tables. One (let''s call it location) contains a single address. The other (let''s call it company) contains 3 address. I''m trying to figure out the best way to model this. I''ve created an address table, a set up the model as follows: class Address <

I am trying to get polymorphic relations to work for my app. What I am trying to do is explained by this picture http://iroll.org/code/ I can''t figure out the code for in the controller to create a new phone_number and assign it to a person. I have tried everything I can think of. A) do my models look correct? B) what would the commands look like in the console or a controller action

Hi, currently I do some work with polymorphic associations in egde rails class Order < ActiveRecord::Base belongs_to :payment, :polymorphic => true end class CreditCardPayment < Payment end class PayPalPayment < Payment end class Payment < ActiveRecord::Base has_one :order, :as => :payment # common stuff in here end I want to use [Payment] for common functionality

1. A category has parent categories. 2. A product is in many categories and a category has many products. 3. Products and category both have images in the same image table. ie. a product and / or category could have multiple images.<=== my question is related to this So among other things I presume I have to do the following: class Category < ActiveRecord:Base #...

I''m looking to implement model inheritance in a new application. Is there any good alternative to single-table-inheritance? -- -Alder

I have the following three models created applying the polymorphic concept ========================================================================== class SoftwareCi < ActiveRecord::Base has_one :ci, :as => :content end class HardwareCi < ActiveRecord::Base has_one :ci, :as => :content end class Ci < ActiveRecord::Base belongs_to :content, :polymorphic => true end The