similar to: self-referential many-to-many using a join model

All: I have been working on making a self-referential habtm relationship that uses a join model because I want to store info about the relationship. I have been using two sections from Chad Fowler''s "Rails Recipes" as a guide, "Self-referential Many-to-Many Relationships" and "Many to Many Relationships Where the Relationship Itself has Data". So far I have

I''m trying to set up a directional self-referential HABTM to represent an arbitrary semi-hierarchical structure; it works for any data prepopulated into the db, but when I try to create a new relationship, I just get NULLs in both key columns (or 0''s if I turn on the no-null constraint). Here are the migrations: class CreateNodes < ActiveRecord::Migration def self.up

Heyo! I am setting up a self-referencial habtm relationship with the users of my app. I am using Chad Fowler''s "Rails Recipes" to get me started, and everything works great with the join table "people_friends". I add friends by doing somebody.friends << somebodyelse. However, with my app, there is an approval process so my join table has columns person_id,

Hi, I''m looking to add tagging to an application, and I would like to allow self-referential tags, so that I can tag my tags. With the goal of generating a flexible tag hierarchy. After some googling it looks like acts_as_taggable is not the best piece of code, and I''m hoping to use the has_many_polymorphs plugin from http://github.com/fauna/has_many_polymorphs/tree/master.

First, BRAVO for this wonderful plugin: has_many_polymorphs ! Now my problem: 4 models : Collection, Page, Fragment, Belonging (which is the join table): 1 class Collection < ActiveRecord::Base 2 has_many_polymorphs :elements, 3 :through => :belongings, 4 :from => [:pages, :fragments, :collections], 5 :as => :collector, 6 :parent_order =>

Sans rails my normal approach to handling this would be to enforce it in the database and when a database operation failed I''d try to validate the model to produce an error message. It''s always served me pretty well. Rails expects you to validate before commiting but of course this does nothing to guarantee referential integrity. It''s perfectly possible for one

Hello all. I am trying to create a self-referential has_many :through. I used the following site as a guide http://blog.hasmanythrough.com/articles/2006/04/21/self-referential-through but it still doesn''t appear to be working. I have two models. Person and Relationship. A person has many contacts (Which is another person) through relationships class Person < ActiveRecord::Base

Hi Hal, > After investigating PR14133, I've discovered that jump threading can output self-referential instructions: > %inc.us = add nsw i32 %inc.us, 1 such instructions are valid in unreachable basic blocks. > At least in the test case for that bug report, the relevant code is later deleted (perhaps it is unreachable), and so this does not cause a problem. Unfortunately, when

Hal Finkel wrote: > Hello, > > After investigating PR14133, I've discovered that jump threading can output self-referential instructions: > %inc.us = add nsw i32 %inc.us, 1 > > At least in the test case for that bug report, the relevant code is later deleted (perhaps it is unreachable), and so this does not cause a problem. Unfortunately, when vectorization is enabled, this

Hi listers, I''m trying to build an xml doc using Builder, but I''m having trouble getting it to draw a tree structure from a self-referential table. Here''s what I''m after: ========================== ---- object structure ---- node (name => root) - node (name => child 1) - node (name => child 2) - node (name => child 2.1) - node

ok, guys i have followed the self referential recipe from the book it works perfect but now i have some doubts, at the end the model are modified to force the user beign added as a friend that add too who are adding him so how i can make that the full relationship doesn?t be complete until the friend beign added approves it(talking in the implementation of the code of course)? by the way,

Relative newbie so would welcome comments re structure of a self-referential relationship I''ve got. It''s started off similar to the Person HABTM friends in the Rails recipes books (working fine), but I needed to turn the join table into a full-blown model as I wanted to add attributes to it. Few tricky bits dealing with the new :through structure and understanding how :scope

Guys, Anyone ever had this kind of problem with ActiveScaffold? Cheers, Sazima ------------------------------------------------------------------------------------------------ What steps will reproduce the problem? 1. Create self-referential HABTM application (like the common "user has friends" example) 2. Try to add more than 1 friend to a given user using ActiveScaffold. What is

Hi, I''m having a little trouble figuring out how to make a self- referential HABTM bi-directional. I have a Employee class. Each employee can have a couple of bosses, who are also employees. The employee class has the following HABTM: has_and_belongs_to_many :bosses, :class_name => "Employee", :join_table => "bosses_courses", :association_foreign_key =>

Trying to model a bunch of users that have friends that are other users. clearly a job for has_and_belongs_to_many, but the trick is, they have ratings for their friends. I have gone through the Rails Recipes book, and it seems like I''m trying to combine the self-referential many-to-many recipe (12) and the many to many relationships where the relationship itself has data recipe (16). So

Hey guys, I could use some advice on a special case of a function pointer as a formal argument. I would like the function pointer type to contain the actual signature of the function, i.e. not a pointer to var args function. This becomes an issue when I have a function which can take a pointer to itself as an argument... our terminology for this is "a recursive procedure". That is, of

Hi all - I am having some trouble figuring out how to model self-referential entities in Rails. I have a "group" model, which can have 0 or more "group" objects or 0 or more "user" objects. I tried creating a subgroup table that has a parent_group_id and a child_group_id as foreign keys but can''t figure out how to create the mapping in my ruby model

I am going to re-ask a question that has been asked a few times in the past. What is the best way to represent an undirected self-referential many to many relationship. Trivial examples of this include an edge in an undirected graph, or a mutual friendship. Alice is a person Bob is a person Alice and Bob are friends of each other We have a whole bunch of extra information about their friendship

Hello List, I created a self-referential many-to-many relationship (as described in the book Rails recipe #18), where I have a model that has many-to-many relationships with itself. In this case, it''s person who can become friends. The join table looks like this: mysql> select * from friends_people; +-----------+-----------+-----------+ | person_id | friend_id | confirmed |

Hello, After investigating PR14133, I've discovered that jump threading can output self-referential instructions: %inc.us = add nsw i32 %inc.us, 1 At least in the test case for that bug report, the relevant code is later deleted (perhaps it is unreachable), and so this does not cause a problem. Unfortunately, when vectorization is enabled, this instruction causes BBVectorize to hang. Should