similar to: belongs_to / has_many multiple validation errors

Okay, this is something I run into a lot and don''t really have a great solution. Here is a simple example: class Blog < ActiveRecord::Base has_many :posts validates_presence_of :name end class Post < ActiveRecord::Base belongs_to :blog validates_presence_of :name validates_presence_of :blog_id end Now, if I want to create a blog and post at the same time I

I am looking for a little assistance with a problem I have with a simple table join using Rails. I am a relative newbie to both Ruby and Rails so any help would be greatly appreciated . I have two tables products and product_formats. create table products ( id int not null auto_increment, title varchar(100) not null, product_format_id integer

I''m trying to assign a parent foreign key value using collection_select from my child "new" form. The problem I''m having is if I do not make a selection, I get the following error instead of the Rails validates_presence_of error: You have a nil object when you didn''t expect it! You might have expected an instance of Array. The error occurred while evaluating

Hey All, I have a form that submits data to multiple models. I have class Man < ActiveRecord::Base has_many :notes has_many :contacts validates_associated :contacts, :notes validates_presence_of :first_name validates_presence_of :last_name class Contact < ActiveRecord::Base belongs_to :man validates_presence_of :contact_info class Note < ActiveRecord::Base

Hello I have 2 models. link.rb has_many :categories, :as => :categorized validates_presence_of :name, :url, :created_at, :category category.rb belongs_to :categorized, :polymorphic => true validates_presence_of :name Everything seems to work. I select my category from a select tag. The problem is i don''t know how to validate if category is for example empty (nothing in a

Howdy, I''m a Rails beginner working on my first significant project with RoR. I''m trying to figure out how to validate a foreign key (you know, make sure the row actually exists.) However, validates_associated doesn''t seem to be what I want to use, nor does it work... -- BEGIN -- class City < ActiveRecord::Base has_many :schools belongs_to :state

I am trying to create a record with association. Within the create method, I would also like to pre-populate dependent (has_many) records from a template in the database. The child records are <u>mysteriously rolled back </u> if I insert them in a loop. If I try to insert a single child record, it works.I have read the books and tried to google my way out of this but am at a dead

e.g. class Asset < ActiveRecord::Base validates_presence_of :asset_number, :make, :model, :location, :name, :serial_number validates_numericality_of :asset_number validates_uniqueness_of :asset_number belongs_to :user belongs_to :location belongs_to :asset_type, :foreign_key => ''type_id'' end class Location < ActiveRecord::Base validates_presence_of :name

Hello, I''m not sure if I''m missing something blindingly obvious here. All the relationships that Rails comes with assume 0..n, yes? It''s not a strict 1 to 1 or 1 to n because it''s optional. My question is this - What is the best way to implement a required relationship? For example, if I require that a comment is made by a user (a user has many

Hi, I have two models: AdvertisementImages (table: advertisement_images) Advertisement (table: advertisements) The table advertisement_images has a foreign key to advertisements called advertisement_id. Both tables has one entry where the entry in dvertisement_images belongs to advertisement. The model code looks lik this so far: class AdvertisementImages < ActiveRecord::Base file_column

Hi all, I have a relationship (no really!) class RiskMatrix < ActiveRecord::Base has_many :severities, :order => :position, :uniq => true end class RiskFactor < ActiveRecord::Base belongs_to :risk_matrix validates_presence_of :descriptor, :example validates_uniqueness_of :descriptor, :example, :scope=> :risk_matrix_id end class Severity < RiskFactor

I can''t seem to figure out how to get child validation error messages to display. I''m going through the simple blog example DHH uses in his video. In the example, a comment belongs_to a post. Validating posts works fine and the errors are displayed as they should be. When I try to validate a comment using: validates_presence_of :summary It does the proper validation by not

I have two models bank and country. User should only associate a Bank with a country id present in the country table and I put validates presence of country to enforce it but i get error mysql2::Error: Unknown column ''countries.bank_id'' in ''where clause'': SELECT `countries`.* FROM `countries` WHERE `countries`.`bank_id` = 17 LIMIT 1 when updating the bank

I have two model classes: class Item < ActiveRecord::Base belongs_to :channel, :counter_cache => true validates_presence_of :channel end class Channel < ActiveRecord::Base has_many :items, :dependent => true end In the Channel controller I have variable channel.items, an Array of Items. I would like to use the Array find method. However, channel.items.find() is a Rails

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''

Regarding validates_associated... Let''s say I have: article belongs_to author But for whatever reason, I want an article to also be written anonymously and therefore not require an author. Then I have: Article: belongs_to :author validates_associated :author But I DON''T have validates_presence_of. What I want to do is validate that an author is valid --if it is

Hi All, I have some strange problem which appears only on heroku hosting 2.3.5 default stack (not on my local computer) I have some models. Here they are: class Contact < ActiveRecord::Base belongs_to :user belongs_to :type, :class_name => "ContactType", :foreign_key => "type_id" validates_presence_of :name, :on => :create, :message =>

Hi All, Probably this has been asked numerous times, I apologize already! Can somebody point me to a good tutorial on how Rails works with relations? I know about database design and normalization, I also know about programming in general (and OOP for that matter). Only thing I can say is that I''m following the "Four days on Rails" tutorial by John McCreesh. He writes

Hi All, I have the following arrangement: class PickAndPackRequest < ActiveRecord::Base has_many :transactions, :as => :request has_many :postings, :through => :transactions end class Transaction < ActiveRecord::Base belongs_to :request, :polymorphic => true has_many :postings end class Posting < ActiveRecord::Base belongs_to :transaction end But when I ask for

Hi All, View ******** <tr> <td><b>Student: </b></td> <td><%= text_field "student", "fname", "size" => 40, "maxlength" => 40 %></td> </tr> <tr> <td><b>Program: </b></td> <td><select id="student_program_id"