similar to: delete joiner entry when a habtm entry is removed

This may have been asked/answered before - if so, i apologise... I have the following table layout in a habtm relationship: ------------ ----------------------- -------------- | products | ----| categories_products |-----| categories | ------------ ----------------------- -------------- What would be the best way to pull out all the products for a given category? At the

What gives with the stupid stupid power system on the Polycom IP500 (I hope they changed it on the 501's). Anyway, does anyone know if you can get some type of joiner to connect two Cat5 cables together, and will this affect the call/signal quality because my Ethernet cable is longer than the dumb 11ft polycom supply (oh and their manual is the wrong about which end goes into the handset

Assuming we have User, Account, and Role models, and a User has_many :accounts, through: :roles and vice-versa, with the following snippet Rails automatically creates the Role (joiner) record, but with the snippet after Rails will not. I think I''m misunderstanding how has_many through works, so I would appreciate any insight into the subject. def new @account =

Dear All, The 'joineR' package for the joint analysis of repeated measurements and time-to-event outcomes is now available on CRAN. The package contains utilities for creating and manipulating 'jointdata' objects, graphical summaries, a variogram function for estimating correlation structure, and maximum likelihood estimation for a class of random effects joint models. Best

Hi all I have a HABTM relationship between partys and organisators. When I remove party #1 from organisator #1 using org1.parties.remove(Party.find(1)) then I get the party object as return value. So far, so good. But when I try to remove the same party again and again, then I don''t get an error like "This party is not associated with org1" but always the same party

Hi there I have an habtm association between 2 Models. I regularly have to truncate the table on one side of the relationship and repopulate the table with a fresh csv file. I notice that f I do Model.delete_all, none of the records in my habtm join table get deleted, whereas if I use destroy_all they do. However, the overhead of using destroy_all is too great. For the amount of records I have

Hello guys. I was able to figure out that my "stack level too deep" error I was getting with my HABTM destroy method was the result of a bug in rails 1.0. I upgraded to 1.1.2 and now the views and any console-run commands for destroying AR objects linked together via HABTM work just fine. I have HABTM setup between stories and submissions. The issue is that the destroy methods in

I am having a problem with two models that each have a HABTM relationship to the other. For example: CREATE TABLE people (id INT, name TEXT); CREATE TABLE teams (id INT, name TEXT); CREATE TABLE people_teams (person_id INT, team_id INT); The person model has: has_and_belongs_to_many :teams And the team model has: has_and_belongs_to_many :people The trouble comes when trying to destroy

Hello all This is my first post so excuse the basic question. (and any repeats I just got an email saying this post was too big so I have re-submitted a smaller version) I was following the thread on http://lists.rubyonrails.org/pipermail/rails/2006-May/038988.html regarding the STI on HABTM for RoR. I have a very similar problem and was hoping for some help. I have the

I''m 100% positive this has come up multiple times before. I just can''t find it for some reason. I''ve got a HABTM relationship, we''ll just say Item HABTM categories. When I edit an Item via a form, I''d like there to be check boxes for all the categories, and they''ll obviously be checked if an Item has a relationship with a particular

I have a problem related with the HABTM relationships with checkboxes. I''ve got a profile and a service model, both related with has_and_belongs_to_many. The problem is that i can insert new data in the profiles_services table, however, i cant delete already existing data. What could be the problem? --~--~---------~--~----~------------~-------~--~----~ You received this message

I seem to be having a problem working with an object which has a HABTM relationship with another object I know there''s been a lot of talk recently about problems using dual HABTM in a single object but I believe this may be a separate issue. It appears like I''m unable to persist this relationship (i.e. the object saves but none of the entries in the join table are

1. I have a few tables: ''users'', ''shops'', ''addresses'', and ''pictures''. 2. Users and Shops will both use the addresses and pictures tables. I have created several mapping tables: addresses_shops pictures_shops addresses_users pictures_users 3. Users CAN have many addresses and pictures (simple HABTM), but... 4.

Briefly, I want to create an :insert_sql attribute for a has_and_belongs_to_many relationship, and then add items to that relationship using push_with_attributes. Is that possible? Less briefly: I have a legacy postgresql database where one of the join tables has an ID column, so I had to set up the association with a custom :finder_sql attribute, as follows: class Topic <

In AWDWR David says (pg 232), "When a Join Wants to Be a Model: While a many-to-many relation with attributes can often seem like the obvious choice, it?s often a mirage for a missing domain model. When it is, it can be advantageous to convert this relationship into a real model and decorate it with a richer set of behavior. This lets you accompany the data with methods. As an example,

I''ve looked through the docs and the wiki and can''t figure out how to go about generating select options and the update function for an item that has a HABTM relationship. I have a ''parks'' table and the park model has a HABTM to the ''states'' table. On the park edit page, I''d like a multiple select box to appear with all states show,

Hi all, I need to model simple typed polymorphic relations: ''John'' [''works_for''] ''Bill'' ''John'' [''speaks_for''] ''Microsoft'' ''Microsoft'' [''hold_shares_of''] ''Apple'' I''m having a hard time combining : - S.T.I.

Hi, I posted yesterday asking how to get form tags to reference the associated objects in a habtm relationship. I was hoping for Rails Magic, but it looks like Rails doesn''t have habtm magic beyond a certain point. Here was my solution for others who might have the problem. Also, I hope someone shows me that there is a simpler way. The Database Model: class Registration <

What is the best approach for using one form to create two different models and join them? I''m working with a HABTM relationship. For example a project HABTM services and vice versa. I''ve tried using accepts_nested_attributes_for which seems to work when I''m creating a project and using a service that already exists. When the service is new it tries to join the newly

Hi again - another REST question! I think I''ve got a good grasp on it all now, except for how to implement HABTM properly. I understand you need turn the join model into a controller, such as ''memberships'' below, and then use CRUD on that to perform joining actions. class Group < ActiveRecord::Base has_many :memberships has_many :users, :through =>