similar to: Difference with :null

Which is the best way to create a thin key/value related to some model? where a field only could insert those values (keys as 0,1) and where could be showed the values (as Red, Blue) from a drop-list COLOUR_OPTIONS = {0=>"Red", 1=>"Blue"} t.string :colour --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the

You have a nil object when you didn''t expect it! You might have expected an instance of Array. The error occurred while evaluating nil.<< any ideas ? Application works fine with rails 2.1.0 Sandip -- Ruby on Rails Developer http://funonrails.wordpress.com www.joshsoftware.com http://brandpotion.com (Latest project released) --~--~---------~--~----~------------~-------~--~----~

I have been working through an upgrade of my 1.2.6 application to 2.2.2. I am almost there but I have hit a problem with ActiveRecord. Before the upgrade, the following code was working fine. def create_root(administrator) root = create_root_collection(self.pingee_name, administrator,

def test_check_for_validity post=County.new(:name=>"myname",:description=>"mydesc") assert post.save end above is the method and when i run unit test it is saying as 1) Failure: test_check_for_validity(CountyTest) [/test/unit/county_test.rb:10]: <false> is not true. what does it say i cannot under stand please help -- Karthik.k Mobile -

Hi, I made a contact manager app using rails. I added TokenInput plugin to introduce an instant contact search functionality in it. Tried following a railscast http://railscasts.com/episodes/258-token-fields but have been struggling with it for a while. Following is the code I use in my view <%= form_tag({:action => ''show'', :id => @contact_tokens}, :remote =>

I am trying to render a file from Subject resource in a User resource view. I am getting error: undefined method `each'' for nil:NilClass. Apparently @subject is nil but not sure how to fix this... Here is User resourve view (users/show.html.erb) <%= render ''subjects/index'' %> Here is subjects_controller def show @subject = Subject.find(params[:id]) ...

Hello I have a strange problem with this code: <%unless (@students.empty? and params[:commit].nil?) %> <%="test"%> <%= render :partial => ''results'' %> <% end %> Even though in some cases @students.empty? returns false and params [:commit].nil? returns true (or the opposite), it displays the test and the render area. I put before and

I am trying to create a null object in my application. I would like to assigned a null user object for anonymous/ mot-logged-in user, i.e. if session variable has nil data. In my User model, I have created a subclass like this: class UnassignedUser < User def save false end def update false end def username "Unassigned" end def county_id

I was successful in reaching page 184 in the book "Agile Web Development with Rails" 3rd edition and while running the website with PostGreSQL as the backend, the power went down. The PostGreSQL database contents look OK and so do the source code files I was editing. But whenever I click on any "Add To Cart" button in the catalog, I get the following information in the

Title: Nested serialization with to_json and to_xml with array and hash element class Person < ActiveRecord::Base has_one :address has_one :job def office() return "Executive_Suite" end end class Address < ActiveRecord::Base belongs_to :person end class Job < ActiveRecord::Base belongs_to :person has_one :paygrade def Title return "Engineer" end end

Hi everyone, I have recently experienced a strange behavior (strange from my knowledge) in rails. In my controllers ''new'' action, I am creating a few instance variables in the following manner : @controllerModel = ControllerModel.new @model1 = Model1.all @model2 = Model2.all in my ''new'' view, I am using the @controllerModel to create the form for new and I

Hi,I am developing a web app and am following the text-Agile web development.....Each time I click my "add to cart" button" i always get the  page below:I have double checked to see if i have errors in my code,there was none,please what do i need to do to proceed? NameError in InteractController#add_to_cartundefined local variable or method `find_cart'' for

When I have this pattern sign_me(@user, :event => :authentication, :subdomain => subdomain) how can I write it to avoid sending the :subdomain option if subdomain.nil? ( if possible ..) sign_me(@user, :event => :authentication #?, :subdomain => subdomain unless subdomain.nil? ) -- You received this message because you are subscribed to the Google Groups

Hi there, I''ve been looking for a while now and can''t seem to find where I''m going wrong.. I''m following a railscast tutorial to send invites out to people. there''s n invitation.rb page: class Invitation < ActiveRecord::Base #attr_accessible :sender_id, :recipient_email, :token, :sent_at belongs_to :sender, :class_name =>

Hello, I tried the following str ="ÄÄa__" assert str.mb_chars.is_utf8? assert str.is_utf8? # this is logical assert_equal 4, str.index("a", 4) # this is not logical. shouldn''t this be nil !? assert_equal 2, str.mb_chars.index("a", 4) Why is the last line failing? And how could I fix this? Regards, Peter. PS: I am using ruby 1.8.6 on linux with rails

HI everyone, require some help! cannot figure out this error and how to fix it! Showing user/index.html.erb where line #59 raised: You have a nil object when you didn''t expect it! The error occurred while evaluating nil.to_sym Extracted source (around line #59): 56: <% end %> 57: </ol> 58: 59: <div id="hub">Blog: <%= link_to "(manage)",

How can I avoid AR confusing way of handling default values for attributes w/ :null => false? This issue came up before, but I could not find an answer that resolves the issue, which I outline below: First, I add a test table using migrations: class AddTestTable < ActiveRecord::Migration def self.up create_table "users", :force => true do |t| t.column

I''m trying to create a data entry form but getting an error when it sumbmits. I am using an hash to get the names of the fields definied in the controller''s "new" function: def new @thing = thing.new @columns = Hash.new @columns[''thing_general''] = [ ["title","name"],

I have a callback (before_save) that I want to trigger only when certain fields within a record have changed. For example given a user record with ''username'', ''password'' and ''date_of_birth'' I would like the callback to do something only when the ''username'' or ''password'' changes or when the

I think I must be doing something wrong... when a form returns params to the controller, empty fields appear to be returned as blank, not nil. so what''s the point of an :allow_nil=>true setting on a validation? it fails because blank is not the same as nil. i would expect either returned empty fields to be nil, or :allow_nil to really be :allow_blank. otherwise i have to do a search