similar to: Scaffolding support for many-to-many editing (habtm)?

Hello list, For a school management application, I''ve got three tables: - people - subjects - roles (e.g. ''Teacher'', ''Student'', ''Tutor'', ''Lecturer'', ...) The HABTM relationship is 3-way, with the links being stored in the people_roles_subjects table. A person can have a role in a subject, but may have different

I have ruby 1.8.4 and gem 0.8.11 installed on Ubuntu Dapper. Now I wanted to use gem to install rails (as documented in the wiki). That worked fine, but afterwards, the command rails is not found. It seems that the gem install command does not place the binaries in the apropriate directory. The instruction pages at the Rails websites show that one cun simply type "rails" after the gem

I am disappointed about the (seeming) lack of Unicode support in Rails. Is there a howto about working the most important limitations? For example, figuring out the length of an entered word: "???".length() will return 6, not 3. So if there is a maximum number of characters a user is allowed to enter, this won''t work as it should -- it treats strings as byte arrays instead

For a while, I''ve been getting that HMT is replacing HABTM. It appears that HMT can do all of what HABTM can do and more. The question is: Should I stop using HABTM? Let''s take a simple case: A case has many categories For a given category, there are certain valid statuses Category has_and_belongs_to_many :statuses Status has_and_belongs_to_many :categories Question: Is

So having just learned how to do has_many :through as opposed to HABTM, and then, being concerned that I wouldn''t get it to work, I started thinking about these two approaches. It seems to me that the _only_ problem that the HM:T (has_many :through) approach solves that HABTM doesn''t is the issue of the potential collision of id columns between your join table and one of

Hi, Posting here since issue tracking isn''t the best place to discuss. I can understand habtm is moving towards deprecating support for extra attributes in join_table, and to use :through for those cases instead. To clarify, patch<http://dev.rubyonrails.org/attachment/ticket/5216/habtm_join_table_test.patch1.diff>for #5216 <http://dev.rubyonrails.org/ticket/5216>

I am rather new to ruby but was considering to use it for my next project. However, support for Unicode strings would be essential. This includes the correct handling of unicode strings in regular expressions, in IO operations etc. Is there a way to do this in ruby? -- Posted via http://www.ruby-forum.com/.

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

Imagine I want to track people, and the clubs that they belong to. table people with columns person_id, person_name table clubs with columns club_id, club_name And I have the association table: table clubs_people with columns person_id, club_id Now I know how to do this habtm between the two, in order to associate people with clubs that they belong to. However my application also needs a

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

All, I''ve heard recently about has_many :through as a necessary alternative to HABTM (when the join table has it''s own id column, say, in a legacy schema). However, is the prevailing Rails wisdom now that one should use has_many :through in _all_ cases? If so, why? Thanks, Wes -- Posted via http://www.ruby-forum.com/.

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

has anyone managed to do this? It works great for has_one, belongs_to type stuff, but i cant seem to get a HABTM setup going. Any demo code or advice greatly appreciated. Excellent work on this tool by the way its really great work. adam -------------- next part -------------- An HTML attachment was scrubbed... URL:

Greetings railsers - I''m trying to add to a collection through HABTM, but the sql insert is trying to insert a PK rather than letting mysql produce the auto_increment''ed PK. ## @medication_dose holds a validated, saved model @medication_dose.medication_frequencies << MedicationFrequency.find (:all) The above bails with, Mysql::Error: #23000Duplicate

I have two tables, a Projects table and a Clients table. It''s basically a HABTM relationship, but I have additional project/ client-specific information in the join table. I''m trying to use the new has_many :through method to join these. It works fine when displaying records, but when I try to search, I''m having this problem: When I used a HABTM model to search

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''ve loaded (and updated) thousands of these MeteredUsage records. In the middle of a run, I suddenly get: ActiveRecord::StatementInvalid: Mysql::Error: Unknown column ''id'' in ''where clause'': UPDATE `metered_usages` SET `cost` = 12603.46 WHERE `id` = NULL I can''t see anything that''s different about this particular record compared to

Ok, David says on page 241 that sometimes a many-to-many relation with attributes are better implemented as an actual model instead of using HABTM. Well, I''ve got that situation and I can''t figure it out. All of the examples in the book have HABTM examples between 2 different tables, but I want to have a HABTM relation on 1 table with itself. (e.g., if I have a table Things,

Does the new has_many :through and belongs_to :through obsolete (well, replace and essentially deprecate) has_and_belongs_to_many? Joe -- Posted via http://www.ruby-forum.com/.

Hi guys, I have a habtm association working properly. My application consists of both a desktop and a mobile version. My mobile version is made with jquerymobile and I would like my checkboxes in the edit form to look like the checkboxes shown in http://jquerymobile.com/demos/1.0a4.1/#docs/forms/forms-checkboxes.html. My desktop code is the following: <%= check_box_tag