similar to: Polymorphic Associations with inheritance

I''m playing around with RoR and I''m having trouble figuring out how to describe a certain relationship. I''m building a social networking site where you have users who can comment on other users, photos, videos, and blogs. I''ve figured out how to have a comment belong to a user or media item through a polymorphic relationships but I dont'' know how to

Hi I have created a polymorphic association for comments since I need commenting functionality on several models. The issue is that when I create the comment in my Commets#create action, I really don''t know what type the parent is of. So, let''s say I have Foo, Bar and Comment. Comment have this: belongs_to :commentable, polymorphic: true And Foo and Bar both have:

I now have the acts_as_commentable plugin up on RubyForge. This plugin will allow you to add comments to any active_record object in your Rails application. So far the directions are simple, and there are only a few features: To install: ruby script/plugin install svn://rubyforge.org//var/svn/commentable/acts_as_commentable In the readme there is a sample migration you will need to use, with

I''m currently using acts_as_tree to display threaded Comments on my forums-like site. It''s waaay too slow to display a page with 1,000 comments, as it''s issuing a TON of selects. I''m pretty sure I want to convert to the nested set model, using acts_as_nested_set or acts_as_threaded. This should give me the performance I''m looking for. The problem,

Hi, my webapp has registered users and it has articles, blog posts, gossips too. For all these resources I''ve a polymorphic Comment model which is listed below. <pre> id content commentable_id commentable_type user_id created_at updated_at 1 Frist comment 2 Article 1 .... 2 Second comment 3 Post 2 .....

I''m getting this very weird error and I can''t figure out what the problem is. I''m using acts_as_commentable. Basically, I have a partial with this code in it: <div id="<%= ''#{comment.commentable_type}_comment_# {comment.commentable_id}'' %>" class="comment"> <dl> <dt><%= link_to comment.user.login,

Hi people, I''m looking into polymorphic associations as a way to cleanup some messy parts of my code. I think they will allow me to do exectly what I need, but since there''s little to none written on this subject, I''d be delighted if someone could shed some light on this. Especially what the different options and needed table structures need to be. Thanks, -

I am working on a small model mixin called attachment_kung to make attachment_fu polymorphic, so you no longer need a different table and Model class for every associated attachment (Productimage, Ad_doc, etc). All you really need is one model and table to handel all your attachments - in some cases, anyway. I have the code working, but have run into one small hitch that I can''t seem to

Howdy, I''ve been banging my head on this problem for a bit. I''m using the acts_as_commentable plugin which works great. The scenario, I''m on the user''s dashboard and want to display comments with commentable_type = Venue. No problem. But, if I want to display the name of that Venue with the comment... big nasty. The polymorphic key is a composite key and

I''ve been having problems making threaded comments for the last few days. Mainly with creating children and displaying the children. Currently, I have comments shown at the bottom of my articles show view. The top level comments work, but I do not really know how to implement a way for users to "reply" to the top level comments and take them to a form (the comment

Hi all I have the following code in my controller: if @comment.valid? captcha_url = "http://captchator.com/captcha/check_answer/#{captcha_code}/#{@comment.captcha}" result = open(captcha_url) unless result.read == "1" @comment.errors.add(:captcha, "Captcha wurde nicht korrekt eingegeben") raise "#{@comment.valid?}"

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 #...

Hey everyone, I am working on an application that allows users to submit articles, and also comment on those articles. Pretty much exactly like Digg. Everything works fine except that when there are a lot of comments there are a lot of database queries to both fetch the comments and the users who posted those comments. I have used eager loading in other parts of my application to reduce the

Hopefully the subject line didn''t scare you. That said... I have a simple polymorphic relationship (is that possible?): class Part has_many :attachments, :as => :attachable end class Attachment belongs_to :attachable, :polymorphic => true end Calling Part.find(:first).attachments yields this SQL error: ActiveRecord::StatementInvalid: Mysql::Error: Unknown column

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

I''ve been using polymorphic joins from edge rails based on about 5 lines of advice Rick Olson gave me over IRC. There''s some sparse documentation popping up but it seems to cover a somewhat different case. Anyway - I pretty much got it to work - save for one detail. Here''s what I have: class Event < ActiveRecord::Base belongs_to :attachable, :polymorphic =>

It sounds like you want a polymorphic association - class Party < ActiveRecord::Base has_many :comments, :as => :commentable end class BlogEntry < ActiveRecord::Base has_many :comments, :as => :commentable end class Comment < ActiveRecord::Base belongs_to :commentable, :polymorphic => true end then include columns ''commentable_id'' and

Hi to everyone, I have the following models: class Attachment < ActiveRecord::Base has_attachment :content_type => [:image, ''application/pdf''], :max_size => 3.megabytes, :path_prefix => ''../private/attachments'', :storage => :file_system, :processor => :rmagick,

Hello, i have the following models in my application: class Message < ActiveRecord::Base has_many :comments, :as => :commentable, :dependent => :destroy, :order => ''created_at ASC'' end class Comment < ActiveRecord::Base belongs_to :commentable, :polymorphic => true end I need "commented" named scope, which do the follownig thing:

I would like to associate a ‘product’ model with 3 models inherited from ‘image’: part, action and accessory. I have it working with Has_many :through relating products to images through attachments, I then have to determine the ‘type’ of the STI extension. This means i have to go product.images. While this is ok, i can see it getting tricky when i want to go products.images <<