similar to: Hitting unknown error with "can't dup NilClass"

Hello, I get an error while retrieving records from the following model structure. Tables foods - id, food foodallergies - food_id, symptom_id, a few other columns symptoms - id, symptom Models class Food < ActiveRecord::Base has_many :foodallergies has_many :symptoms, :through => :foodallergies end class Symptom < ActiveRecord::Base has_many :foodallergies has_many :foods,

Hello friends! I am trying to make a database that will have a group of people set to committees, and a person can be in multiple committees, and a committee obviously has multiple people. The people are senators at my university. These are my current models: senator.rb: -- class Senator < ActiveRecord::Base validates_presence_of :first_name, :last_name, :floor has_and_belongs_to_many

I have an object that belongs_to :task, and calling that object''s task method returns the task it belongs to in the unit tests. One place in a controller, though, it gives me the error: undefined method `find'' for Rake::Task:Class ./script/../config/../vendor/rails/activerecord/lib/active_record/associations/belongs_to_association.rb:44:in `find_target''

Hi! I got a class named EinsatzFilter which I serialized to session. Before saving to session it works afterwards I keep getting the message: "undefined method `to_s'' for #<Person:0x38c6ab8>". "Person" is a from ActiveRecord::Base inherited class. Code: class EinsatzFilter include ApplicationHelper attr_reader :personen, :monat, :projekte, :kunde

trying to set up a "has_and_belongs_to_many" relationship would very much appreciate the help, not sure what im doing wrong at all. Scheme.rb class Scheme < ActiveRecord::Base validates :schemename, :presence => true belongs_to :user has_many :levels, :dependent => :destroy has_and_belongs_to_many :works end Work.rb class Work < ActiveRecord::Base

Hi All, I''m going to end up hosting a site on a server in a fastcgi environment, but I''ve been doing most of my development under mongrel. I have a bit of code that spawns a thread, and in the thread it makes some remote calls (openuri) and does some database inserts via activerecord. When I do this under FastCGI, everything appears to work as expected. When I do it under

I''ve been stumped on this for a few days and I''m not sure if it''s an error on my end or an actual bug. I have a system where I have workshops and users. Workshops have students, presenters, and troubleshooters. I wanted to represent this simply by using has_many :through with :source. Workshop has_many :presenters, :through =>:presenterships, :source=>:user

In my continued efforts to port my rails 1.x app to Rails 2.1.2, I keep running into what appear to be ActiveRecord bugs. I am using an :include on a :has_many definition: class Request < ActiveRecord::Base has_many :service_types, :order=>''service_types.id ASC'', :include=>:service_response [...] There''s no reason this wouldn''t be supported in

Guys, I am trying to figure out what exactly does this line do at the end of "acts_as_paranoid" plugin? ActiveRecord::Base.send :include, Caboose::Acts::Paranoid::ActiveRecord My problem: I have some classes that I use acts_as_paranoid, and others with tagging support. Classes declared as taggable, throw error, which appears to be in the acts_as_paranoid version of the

Hi all I tried and tried and tried, but I still fail in creating a form with proper validation and stuff for foreign keys... So I''d really like to get some help here. I''m creating a booking site for DJ''s, and for every booking one can choose one of different countries: class Booking < ActiveRecord::Base validates_presence_of :country_id

Hi, I''m trying to use :through and STI using the trunk version of Rails, but I get the following error see bottom of this msg[1] here are my classes. class Player < ActiveRecord::Base end class Ladder < ActiveRecord::Base has_many :subscriptions has_many :players, :through => :subscriptions end class SingleLadder < Ladder end class Subscription <

class Ladder < ActiveRecord::Base has_many :players has_many :users, :through => :players end class Player < ActiveRecord::Base belongs_to :users belongs_to :ladders end class User < ActiveRecord::Base has_many :players has_many :ladders, :through => :players end When I try the following code (on the console) I get an error: @ladder = Ladder.find(1) @ladder.users I

Hello all, I got this problem while trying to shape traffic with iptables MARK and HTB. MARK: targinfosize 8 != 4 --set-mark gives "invalid argument" error message. Kernel version is 2.4.29 (some patches from patch o matic applied) Iptables version 1.3.4 Intel x86 architecture. I saw this problem discussed in a few places, but the discussions didn''t come to a conclusion

Hi, while generating the PDF file , i am getting following error.. please help for me. RuntimeError (JPEG marker not found!): C:/Ruby/lib/ruby/gems/1.8/gems/pdf-writer-1.1.8/lib/pdf/writer/ graphics/imageinfo.rb:176:in ` measure_JPEG'' C:/Ruby/lib/ruby/gems/1.8/gems/pdf-writer-1.1.8/lib/pdf/writer/ graphics/imageinfo.rb:174:in ` loop''

Hi, I hope someone can help me because this is driving me crazy, I''ve spent hours trying to track this down. I''m trying to convert a Rails 1.1 to Rails 2.3.2 and I''m getting the following error when trying to save a many to many relationship. I''ve double checked all the associations, I''ve used console to test my models and they all work ok, I can do

So, I''ve written a partial that does some stuff with a given instance of my class "entity". Entity is ActiveRecord. I''m able to retrieve all sorts of data from an @entity, until I do something like: <% for @attribute in @entity.attributes %> <div id="attribute_<%= @attribute.id %>"> <%= render(:partial =>

I don''t have a class by the name of "ReviewersScoreCard", yet my many to many configuration looks as follows. And, these errors while running some simple test with ./script/console is giving me a headache: ./script/console Loading development environment. >> r = Reviewer.find_first => #<Reviewer:0x19d0a48 @attributes={"id"=>"1",

Hi, The application is deployed on Heroku, is based on Ruby 3.2.1 and Rails 1.9.2. Sometimes a function of my props starts throwing this error " StringUtils:dateTimeFromString, str , *can''t dup NilClass*" and I don''t understand the cause. it''s my function: require ''time'' module StringUtils

We spent a big chunk of yesterday hunting down a strange bug in one of our rails apps and created a test project to try out different theories on what was going on. The result so far is a very small test case app that perfectly reproduces the problem. The question is, is there anything *wrong* with what we''re doing here, or is it a problem with ActiveRecord? We''re on rails

Looks like Rails 1.1.0 RC1 is finally here: http://dev.rubyonrails.org/changeset/4010 -- Posted via http://www.ruby-forum.com/.