similar to: Join using :THROUGH - SQL is wrong even when using :SOURCE

I have the following model structure setup. class User < ActiveRecord::Base end class Parent < User has_many :relationships has_many :children, :class_name => "Student", :through => :relationships, :conditions => "related_as = ''parent''" end class Student < User has_many :relationships

Hello! I have 2 table: users and buddies User: id, name, ... Buddy: id, user_id, user_buddy_id, ... So if you have 2 users 1,jack and 2,fred and fred is a buddy of jack, there is a Buddy object: id=1, user_id=1, user_buddy_id=2 I can declare only one belongs_to in Buddy and one has_many in User. And there is conflict if I had the second one (the first one is discarded) class User has_many

Greetings. First, this example is just my way of exploring :through. It probably doesn''t need has_many :through, and could just use a standard HABTM association. Here''s the models: class CourseRequisite < ActiveRecord::Base belongs_to :requisite, :class_name => ''Course'', :foreign_key => ''requisite_id'' belongs_to :course,

If I have a class, Asset, which has and belongs to many associated Asset objects, how do I do this? has_and_belongs_to_many :associated_assets, :class => "Asset", :foreign_key => ?????, :association_foreign_key => ????? Right now, my table has a :first_asset_id and a :second_asset_id, but I don''t see how the objects themselves are supposed to distinguish one from the

I have been trying to model a labeled graph using ActiveRecord (trunk version). Basically, I have a ''Node'' model which represents a node linking to other nodes. Links (aka edges) are labeled (i.e., have a ''label'' attribute and other behavior). Thus I decided to model edges as an ''Edge'' model and use a ''has_many :trough''

Hi all, I''m working with a legacy sqlserver db and I''m trying to override the insert sql in as defined in the HABTM method below(becasue the join has three primary keys), but I''m getting the error: ''undefined local variable or method `record'' for Project:Class'' has_and_belongs_to_many :people, :class => ''Person'',

I just took my HABTM and turned it into a :through since my join table has another "non-joiny" attribute. I went from this: has_many_and_belongs_to :jobs, :join_table => ''tablename'', :foreign_key => ''x'', :association_foreign_key => ''y'' to this: has_many :jobs, :through =>

Here''s a simplistic model class. class Person < ActiveRecord::Base has_and_belongs_to_many :relatives, :class_name => ''Person'', :join_table => ''relatives'', :foreign_key => ''from_id'', :association_foreign_key => ''to_id'' has_and_belongs_to_many :brothers, :class_name =>

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 =>

Quick question. Say I have a geographical database with counties and zip codes where counties have and belong to many zip codes. zip_codes (id, zip_code) counties (id, name) When I create the association table, the Rails way says to do the following: counties_zip_codes (county_id, zip_code_id). However, given that zip_codes.zip_code is itself a candidate key, I would much prefer to do the

I have more or less the same problem. I''m trying to build a system where users can enter their friends. But the solutions seems not to work for me. I used same sql: CREATE TABLE `friends` ( `user_id` int(11) NOT NULL default ''0'', `friend_id` int(11) NOT NULL default ''0'', KEY `user_id` (`user_id`), KEY `friend_id` (`friend_id`),

I''m trying validate date before they''re stored into the DB, but it seems, validation doesn''t work.. my model looks like this: class Company < ActiveRecord::Base has_many :contacts, :foreign_key =>''company_id'' has_and_belongs_to_many :categories, :join_table => ''company_to_category'', :foreign_key =>

Im having an issue that seems to only happen when trying to use a transaction. Ive used transactions many times in the past and Im at a loss as to why im getting the stack level too deep problem. SystemStackError - stack level too deep: actionpack (3.2.13) lib/action_dispatch/middleware/reloader.rb:70:in `'' I have a StackOveflow with more detail -

I am running on Rails 2.2.2 on Solaris (and also on my mac) against mysql. For some reason, when I use a select in the partial, the database does not get updated with the changed value. I am using checkbox for other fields which works perfectly. I can provide more information if needed, but I would like the field to work as a dropdown instead of a text field. My Model:

I am working with mapping ActiveRecord onto a legacy database. All is going well (using set_table_name, set_primary_key, etc), but I can''t get my many<=>many relationships to work. My contrived example of the situation: Student has_and_belongs_to_many Teachers. This is mapped via table student2teacher where the foreign keys are studentId and teacherId. The primary key in Student

I have a site where Users can become Friends with other Users. I used to do this with a habtm, but of course I want to stay up-to-date and convert this to a has_many :trough. Unfortunately I can''t get it to work.. the documentation on this feature is a bit sparse at the moment. This is my old habtm: has_and_belongs_to_many :friends, :join_table => ''user_friends'',

I have a problem declaring a relationship through a join_table ; the SQL generated by ActiveRecord is correct, but there are two columns called ''id'', and the final object gets the ''wrong'' column ... Here''s a more detailed description of the data, code, and problem :- There''s a People table, with id, name, and a few things. Also a

Hi all, I am having trouble trying to use reflect_on_association method with given the simplified model: class Order < ActiveRecord::Base belongs_to :contractor, :class_name => "BusinessUnit" end I expected the reflect_on_association method to return associated_foreign_key "contractor_id" but it returns "business_unit_id": ruby-1.9.2-p0 >

I''m struggling with a single table type (self) lookup. my ''personnel'' model has a supervisor_id and is_supervisor column. The supervisor''s select list is created by @supv = Personnel.find(:all, :conditions => ["is_supervisor = true"], :order => ''last_name'') in my personnel model, I have the following... def

Doesn''t appear to work with WEBrick. Works find with Apache/FastCGI. Something wrong in the way Rails is trying to process paths from the WEBrick server. If I try to send in http://localhost:3000/recipes/new, WEBrick is interpreting /new as my controller, instead of my action.