similar to: Dumb polymorphic association question

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

Hi, Four tables: users, user_counties, uk_counties and us_counties. Each user has many counties, and each county has many users, so I decided to make user_counties a polymorph, so it can have counties from different countries (each country requires a completely different set of tables with a completely different set of properties, that''s why there''s one table for uk_counties and

Dear Railers, I am toying with a new project and have a schema design question. I have a tree-like node structure. Each of the nodes will be associated with a single object. This associated object can be of a variety of types. I represent the tree through a Node class which acts_as_tree. Now imagine three other classes--Animals, Fruits and Vegetables. Each node will have an association

Is there any sort of dynamic finder for polymorphic associations? For example if I had: class InviteNode < ActiveRecord::Base belongs_to :inviteable, :polymorphic => true end I would like to be able to search by: InviteNode.find_by_inviteable(some_object) instead of having to do: InviteNode.find_by_inviteable_id_and_inviteable_type(some_object.id, some_object.class.name) obviously I

Josh Susser tells in his blog that the opposite direction of polymorphic will get into trouble together with has_many through. This is the url: http://blog.hasmanythrough.com/articles/2006/04/03/polymorphic-through I do that according to Josh Susser''s procedure: class Tagging < ActiveRecord::Base belongs_to :tag belongs_to :taggable, :polymorphic => true belongs_to

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 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

Hi, I''m currently having the situation where I have to implement a polymorphic has_and_belongs_to_many by introducing an in between model that handles all the "has_many :as" and "belongs_to :polymorphic" association implementations... and is not doing anything else. Thing I don''t like it here is, I am unnecessarily loading AR instances only to execute SQL

Hi, I am trying to find a way tp update attributes in a habtm association. I am trying to use the code from ticket #2462, but as my association_class_primary_key_name seems to be empty the generated sql code is corrupt. I hope thats not a problem of my model that this variable is empty. What would you recommend to update those attributes (rails 1.1) THANKS!!! -- Posted via

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

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, 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

Hello All, I have a little challenge and I am not sure if this is even possible I am working on a dating/event site and few functionalities are similar that I want to centralize them. We have users which can have - favorite users - interest list - blocked users All these relations are like; User <-> Relation <-> User I was thinking I could have a class called Relation (with a

No matter what I try I''ve been unable to work how to get this to work with the cool ActiveRecord helpers. I''m not sure if it''s possible, Josh Susser''s blog suggests it is, but damned if I can work it out... I have: Container which can contain one or more Element. An Element is a polymorph of either a Container or a Chunk. An Element can exist in one or more

I have done a little polymorphic associations stuff and have refreshed my memory on it again. What it seems like is that if I have a particular record and I want to make it easy for many different parent records to associate with it using has_one or has_many, that is fine. If I want a parent record to have multiple kinds of children through one association, I don''t see how to do that

Hi I have a has_many :through. It''s a basic mapping of Project id .... User id .... TeamMembers project_id user_id role What I would like to do is have different roles so I can have in the project model has_many :core_members, :through => :team_members, :source => :user but I would like to limit this to only those with the "core" role in the team members table for

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

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''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/.

i''m trying to get :through associations working per the wiki: http://wiki.rubyonrails.com/rails/pages/ThroughAssociations i follow the instruction to the t, with the exception that i''m trying to use it with a polymorphic association. here are the associations in my models: Collection has_many :collectings Collection has_many :collectables, :through => collectings Collecting