similar to: after_save and associations

Dear list, I am trying to override an after_save callback declared in main app using plugin. The main model class is: class WorkHours < ActiveRecord::Base @after_save_call_back_called=0 after_save :after_save_call_back def after_save_call_back logger.debug "after save called" @after_save_call_back_called=1 end end And in my plugin (in the lib directory) : module

I''ve got a User model and a Book model. A user is required to submit books each month to be reviewed by other users. I have the following relationships defined: # the join model book_review.rb belongs_to :user belongs_to :book end book.rb # each book is reviewed by many users. This allows us to get the BookReview # objects associated with this book has_many :book_reviews,

Hello all, I have an Order object that has and belongs to many Products and has and belongs to many Loan Types. This is so I can select multiples of each in my order entry screen via checkbox groups. I''m having some trouble with saving multiple HABTM associations for a single model object; only the first HABTM association declared in the model will save during the initial @order.save

When I have a habtm association between two models (User & List), implemented thru a join table users_lists, there are a variety of ways to "delete" associations between specific User<->List combinations. ActiveRecord lists delete, clear etc. However, these methods all operate by setting foreign keys in the join table to nil and do not remove rows from the join table.

Hi, AFAIK after_create is called after_save if the entry does not exist in the DB. Is there a way to tell if a specific model is new or not in after_save? I have to do something like: def after_save add_to_history ''save'' end def after_create add_to_history ''create'' end However after_save is called when creating too. -- cheers, M.

Hi, I am trying to restrict duplicate has_and_belongs_to_many associations. I tried to find support for a association validation for duplicates but couldn''t find anything. I understand I could use :uniq=>true on the model association but this would only prevent it from displaying duplicates, I want to stop duplicate associations being inserted in the first place. I have a vague

Hello, Is it possible to have several HABTM-relationships for the same object? Example: Imagine I have 3 objects (classroom, student, teacher) and define the associations for the student as: class Student < ActiveRecord::Base has_and_belongs_to_many :classrooms has_and_belongs_to_many :teachers class Classroom < ActiveRecord::Base has_and_belongs_to_many :students class Teacher <

class User < AR end user = User.new Let''s say that I have a user instance with me. After this record is saved I want an after_save callback which would print the id of the record. The only catch is that I am not allowed to change the User class. How can I accomplish my goal? Is that even possible to add an after_save callback on a particular instance object. Any metaprogramming

I have a very strange problem here. I do not get this. So any help is greatly appreciated. Basically I have a model that calls a method in the background process in the "after_save" method. Let''s call the model products. So what happens is this: 1. I create a new product. 2. Everything works and the product is saved with id 13. 3. A method is called in my background

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''m trying to add some code for my ActiveRecord class so that it is executed whenever an object is updated, this code is a seperate process that reads from the same table represented by my model class so when it runs it needs the database to be up to date. In the following situation this is fine: # MyModel def after_save `/usr/local/bin/update_models -i #{self.id}` end # controller

Having one to many connection (for example post has many comments), what is the most efficient way of saving all comments when post is saved. Using after_save on Post would introduce the n+1 problem. Is there any way of saving the whole structure at once? -- Posted via http://www.ruby-forum.com/.

Does after_save in a model delete if an exception is raised in there? I simply did def after_save raise ''hmmm'' end and it raised the exception but there was nothing in the database. I removed that entire method and its in the database. Is this correct? Thank You, Ben Johnson E: bjohnson@contuitive.com -------------- next part -------------- An HTML attachment was

Could someone please help me with this association scheme? I am familiar with habtm as well as the :through association but this one has me stumped. Here is an example DB. Tags Table: ------------------------- id name Taggables Table: -------------------------- id tag_id taggble_type taggable_id For purposes of this example say that there are 2 other tables that can be tagged and their model

Hi, currently the eager association loading via ":include" does not work when a has-many or habtm association is combined with offset/limit (which is required for paginations). This is because in these cases, the result set will contain more than one row per object, but limit/offset works on row numbers. I''ve developed a patch that makes this work by using 2 SQL statements

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

I have a Production model, which represents a farmer''s crop. After create (via after_save) I call a method that creates one or more Supply models, which represent a week of anticipated product harvest. After each of those are created, a class method gets called that tries to match each new Supply with outstanding orders for the same time period. If a match is made, a transaction (an

Hi all - I''ve got a model Foo that has an after_save() method. I''d like to disable it while doing a rake conversion. Seems I should be able to just redeclare Foo.after_save() somehow, but I''m not quite sure how to do that in the rake task... Any ideas? Thanks! -philip

Is there some sort of good pattern for dealing with computed values with Rails/ActiveRecord? A simple example: 3 tables, classes, students, and student_class_records (habtm style relation but contains a good deal of additional state so is modeled explicitly) Something like select the 10 classes with the most students. Easy enough in SQL. So I''m using a lot of find_by_sql and

Hi. I have a couple of best practices questions regarding polymorphic associations, naming join tables and user permissions. Currently I have implemented the user authentication model from the rails recipes book. Basically it goes something like this: MODEL CLASSES: class User < ActiveRecord::Base has_and_belongs_to_many :roles end class Role < ActiveRecord::Base