similar to: HABTM associated record presence validation

Greetings - I''m trying to find the most efficient, "Rails" way to solve the following problem. It''s in two parts, but I think the solution is somewhat related: I have Recipe and Category model related by HABTM. I would like to 1.) Validate the *number* of categories associated with a recipe, say a minimum of 1 and a max of 3. (So validates_associated will not

Hello List, I''m a bit spent on this problem, and my code might be whack. I seem to be encountering a problem where the primary key on a join table is not being resolved correctly. I will elaborate after some code bits. I am creating the join table using migrations, and relevant model code is this: class Post < ActiveRecord::Base has_and_belongs_to_many :records

Is there a way to update attributes in a HABTM join table? Right now I am deleting the join and then recreating it with new attributes. I have a table "categories" and another table "items". They are both HABTM with the join table "categories_items" between them. If an item is joined to a category once, no problem, we create the join. But if an item is

Hi there, I have a question on what would be the best way to save a HABTM model. A posting habtm categories, and a category habtm postings. class Category < ActiveRecord::Base has_and_belongs_to_many :postings end class Posting < ActiveRecord::Base has_and_belongs_to_many :categories end In my blog_controller, where the actual posting is saved, is where I think I''m

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

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

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

Hello, I am very new to ruby and need to create my first HABTM with multiple select list.  I am having problems saving data in the middle(linking) table.  1. titles can have multiple categories  2. categories can have multiple titles Categories, titles and categories_titles tables are created.  ----- title_controller.rb--   def new     @title = Title.new     @categories =

I am very confused about HABTM and a form select statement that I need to implement. I have two objects - Person which has the following fields: id, firstname, lastname, email Category which has the following fields: id, name A person HABTM categories and also the reverse. I have setup the join table using a migration. All that went well. Two questions - If I want to edit a person, how do I

Hi converted two of my models to HABTM today but I am having a real hard time getting my unit tests to pass now. Specifically, when I destroy a record I get this error: ...many many lines of this above... (eval):4:in `destroy_without_habtm_shim_for_categories'' (eval):4:in `destroy_without_habtm_shim_for_categories'' (eval):4:in

Is there an easy way to paginate HABTM? Something like (which doesn''t work): @pages, @directories = paginate :directories, :include=>:categories, :per_page=>ITEMS_PER_PAGE directories and categories have an HABTM association. Joe -- Posted via http://www.ruby-forum.com/.

I have 2 tables: products and categories. They are both linked by a habtm association. I have a fixture to import all the data in each table but I dont know how to import the data in the categories_products table since that table has no model, so I cant use that code: f = Fixtures.new(Category.connection, # a database connection "categories", # table name

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

Hello Experts, I have a HABTM association as followed: class Account < ActiveRecord::Base has_and_belongs_to_many :user end class User < ActiveRecord::Base has_and_belongs_to_many :type has_and_belongs_to_many :account end class Type < ActiveRecord::Base has_and_belongs_to_many :user end I have the following query; I Have a parent user who is creating another user under its

If Product and Category models are in a habtm relationship, i.e. class Product < ActiveRecord::Base has_and_belongs_to_many :categories end class Category < ActiveRecord::Base has_and_belongs_to_many :products end I want a piece of code to be executed every time a product is connected to a category. Where do I put this code? Which callback (and on which model) will be triggered? Any

I have successfully used HABTM to create a many-to-one-to-many set of rows in one step. Now, if two objects I want to associate already exist, how do I create the join row? The Agile book mentions the ''push_with_attributes'' method. The text says this method is useful for adding additional attributes to the join row (in the example a ''read_at'' timestamp). I

I have a model “Conversation” and a model “Leader”. A Conversation is always led by exactly 1 Leader. I’ve overridden Conversation’s “validate” method to validate the presence of an associated Leader model. If I add a similar validation to the Leader model, however, Conversations can no longer be saved on creation because the Leader model is invalid. On creation of both a new Conversation and

Hey gang, How does STI work with HABTM? For instance...let''s say I have the following models ----- Category < ActiveRecord::Base Item < ActiveRecord::Base Product < Item Deal < Item ----- Each product or deal can have categories. Would I then setup Item with has_and_belongs_to_many :categories, then create a table categories_items ??? Is there a better way to do it?

I''ve got a fairly basic has_and_belongs_to_many setup, with a Business model and a Category model. In the admin functionality for the Business, I''d like to have a multiple select box showing all of the Categories, with included ones selected, etc. I''m stumped as to how to do it, though - it seems like there should be an easy way, but I''m missing it looking

Hello, I was wondering whether there is a nice Rubyesque way of selecting from a pair of HABTM models where one of them is inherited from another object. Here is the situation: I have a ''posts'' table from which ''replies'' and ''articles'' are inherited. Articles have_and_belong_to_many categories, but neither posts nor replies do (it just does