similar to: validates_presence_of validation order?

If I have belongs_to :user Do I need to have validates_presence_of :user_id ? Does Rails validate the presence of :user_id automatically if I have belongs_to :user? In other words, does Rails prevent against creating orphan records that belong to non-existent users? Thanks. -- Posted via http://www.ruby-forum.com/.

I''ve checked the Rails documentation but find no mention of link_to ''external url'' or equivalent. Does rails have a built in method to do this? thanks -Lindsay -- Posted via http://www.ruby-forum.com/.

Does anyone have advice on how to go about locating the cause of this error message: ActionView::TemplateError (wrong number of arguments (3 for 1)) on line #4 of app/views/products/search.rhtml: 4: <%= start_form_tag :action => ''search'' %> I don''t see anything wrong with line 4 above. Some background: I''ve made a number of changes to Controllers,

Hi, Is it possible to specify multiple before filters in a controller... here''s the thing: only one set of filters is to use the :except option. Something like: before_filter :check_for_session_cookie before_filter :validate_user :except =>[''login''] which I use to a) check if the user has returned to the site and has a saved cookie holding login details b) check

I am trying to figure out how to write a conditional statement that will execute only if a specified variable is not empty. Right now my view looks like this: <dt>Building Regulations</dt> <% for link in @cat1 %> <dd><a href="<%= link.url %>"><%= link.title %></a></dd> <% end %> Action: @cat1 = Link.find(:all, :conditions

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

My model is very simple, it''s mostly just a join table that represents which tournaments a user has registered for. class Registration < ActiveRecord::Base belongs_to :user belongs_to :tournament validates_presence_of :user_id, :tournament_id validates_uniqueness_of :user_id, :scope => :tournament_id end the validates_uniqueness checks to make sure there''s no

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 =>

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

Hello all. I don''t know how to get all symbols passed to method validates_presence_of in model. I''ve trying to use following solution: class News < ActiveRecord::Base validates_presence_of :title, :text def validates_presence_of(*attr_names) @@obligatory_fields = attr_names ActiveRecord::Base.validates_presence_of(*attr_names) end def obligatory_fields

Hi, I have a call to validates_presence_of in my model and it is behaving very strangely my first stab when this happened during testing was validates_presence_of :impact, :ease_to_implement if Proc.new { |record| !record.cost_estimate.nil? } I have three values in my model that I care about with this one. Basically what I''m trying to get to happen is if one is there they all must be

I am trying to set up a validation in a model to ensure that a record can''t be saved unless the foreign key it belongs_to is a valid record. My model says: class Admin < ActiveRecord::Base validates_presence_of :user_id validates_numericality_of :user_id validates_uniqueness_of :user_id validates_associated :user belongs_to :user end but I can still create an admin

Hi, I am trying to use method `validates_presence_of'' for validating my input fields on form . I m using it in my action class as follows:- ======================= validates_presence_of(params[:product][:quantity]) ====================== But when I am running my application i m getting error like:- ========================= undefined method `validates_presence_of'' for

Hi - I have 3 fileds a user can fill out. They can fill out 2 of them or just one of them, for example. fill out these 2 fields: Field1 and Field2 Or fill out this field: Field3 In my model how do I use validates_presence_of for Field1 and Field2 or just Field3. I want to do something like this: validates_presence_of Field1, Field2 OR validates_presence_of Field3 So the user can fill out

Hi, I''m running the code example for ''Dynamically Updating a List'' in Agile pages 404-406: When I enter a new to-do, and click ''New Item'', a new page is rendered only displaying the new to-do just entered. This isn''t what''s expected. The to-do list with id="items" should be updated so the to-do list dynamically grows.

I have a model that contains a :boolean field. In my view, I have a simple select of Yes or No, which equates to true or false, respectively. If I choose yes and save, everything works great. If I choose no, my model fails validation as I have this set as a required field using validates_presence_of. I have checked the log and it''s definitely set to false, why would this fail validation?

Hi, I want to type text into an input field then on enter, use AJAX to update the value of an input field elsewhere on the screen. ''observe_field'' allows me to watch a form field and dynamically update a DIV. Is there a variation or other method to allow me to update a field instead? -- Posted via http://www.ruby-forum.com/.

i have a person object. Persons don''t need to have addresses, but if they have any address field value, they must have them all. So I have something like this: validates_presence_of :street_address, :city, :state, :postal_code unless :address_blank? address_blank? checks whether all of the address fields are blank. If I run a test like this, it works: describe "given

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

Category.has_many :products Let''s say a product must belong to a category. I know it is recommended to do the following: class Product validates_presence_of :category_id end But, as we all know, this is a pain for new records, meaning what if the associated category is a new record? I''ve been meaning to ask this, but what''s wrong with doing the following: class