similar to: Removing a default value for a foreign key with not null set

I have a people table with four types of people: clients, spouses, children, and others all setup using single-table inheritance with a foreign key back to a household record. A Household has_one client and spouse, and has_many children and others. I want to use a single "Household.find(@session [:household_id], :include => [:client, :spouse, :children, :others])"

Hi all I use the plugin which supports foreign keys with migrations: http://wiki.rubyonrails.org/rails/pages/Foreign+Key+Schema+Dumper+Plugin/versions/12 I have created the following migration file: class AddArtistsTable < ActiveRecord::Migration def self.up create_table :artists, :force => true do |t| t.column :name, :string, :limit => 100 t.column :artist_type_id,

Hi dears, I expect that Mr Thomas Lumley will read this message. I have data from a complexe stratified survey. The population is divide in 12 regions and a region consist to and urban area and rural one. there to region just with urbain area. stratification variable is a combinaison of region and area type (urban/rural) In rural area, subdivision are sample with probabilties proporionnal to

Does anyone how to create a validation that: validates_presence_of :a OR :b I.e. :a OR :b must be present. I thought this would probably be possible with some kind of validation callback, e.g.: def check_a_or_b_is_set return (a or b) end Any ideas? Thanks, Rob -------------- next part -------------- An HTML attachment was scrubbed... URL:

Hi all My visitors can create party organisator profiles, and I want assign them as the creators (the field creator_id in the organisators table references a member in the members table). To do that I tried it with before_validation: def before_validation creator = Member.find 1 end Sadly, this does not work. The validation validates_presence_of :creator_id Still tells me, that

Good afternoon! As mentioned in the subject, my question regards more the methodological part that accompanies survey design and the statistical part that is involved. So, I have the following data: a<-data.frame (id_hh=c(1:5), strata=c(1,1,2,2,1), Nhstrata=c(100,100,200,200,100), Nrmemb=c(2,4,2,5,4)) a$ocmemb1<-c("wk","jl","st","jl","st")

Hey there, There''s been a bit of work going on with Selenium and Rails recently, so I thought I may as well share what I came up with. Check out my blog post at http://blog.viney.net.nz/articles/2006/02/09/selenium-testing, grab the plugin and give it a whirl (be sure to read the README!). Basically, my approach was to make it possible to write Selenium tests in the same way that

Can I use validates_presence_of somehow if I want to check that at least one of 2 fields is not empty? Thanks, Dmitry -- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to

Dear R users, I am trying to convert a dataset from one format to several rectangular datasets. A consultant helped design the data entry program for our survey using Delphi/Pascal and for each household the information is stored in a file called "EA-HM-HH.TXT" where EA is the enumeration area number, HM is the homestead number and HH is the household number. Within this file the

Hi all, Here''s another little plugin I wrote to use AR models without tables. It''s dead simple, just extend from ActiveRecord::BaseWithoutTable instead of ActiveRecord::Base: class Contact < ActiveRecord::BaseWithoutTable column :name, :string column :email_address, :string column :message, :text validates_presence_of :name, :email_address, :message end

Recently I wanted to check that my test data was valid. Seems like a reasonable thing to want to do so I thought I''d share the rake task. Add this code to a rake file in lib/tasks and run with rake db:fixtures:validate. It will print out the class, record id and error messages for any model objects that fail validation. Enjoy! -Jonathan. -- namespace :db do namespace :fixtures do

I have a problem with ruby on rails validation total_book_toy.rhtml ================ <%= text_field ''book1'', ''title1'' %> <%= text_field ''book2'', ''title2'' %> I want to validate these text_field so user can''t insert same title. However, I was stuck how to do it. Or maybe you have another way how to do it.

Hi, guys, I''m learning to use Rails, and, while reading the "Rails: Up And Running" book, I tried to make an insertion validation, using the following code: class Photo < ActiveRecord::Base validates_presence_of :filename end It simply didn''t work, the validation does nothing and an insertion with an empty field returns TRUE. What''s wrong?

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 have two types of users; normal user and admin. I have a field called priority in the table task. This priority field is invisible to the normal user, but not to the admin. The admin has to fill in the priority field when he adds a record via filling a form. Thus, i need to add validates_presence_of :priority to the model task. But, if i do this, then the normal user can''t add a

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''

Hi all, Short of hacking the code apart, is there a method making the login_engine authenticate against email address rather than username? I find that people rarely remember usernames, and would prefer to use email addresses as the identifier. Thanks! Tom

For a sanitation project in Bangladesh I need to design a three stage sample survey to be representative of around 40 million people. I find myself suddenly with several challenges with which I struggle and would be gratefully for any help. As the questions are linked I kept them together rather than creating multiple posts 1) SURVEY DESIGN So far I designed mainly two stage cluster surveys but

Hello! I am doing an analysis on a questionnaire of hunters taken in 4 different districts of some mysterious foreign country. The aim of the study was to gather info on the factors that determine the hunting success of a peculiarly beautiful bird in that area. All variables are factors, i.e. they are variables such as "Use of Guns - yes / no", "Use of Dogs - yes / no" and

Hello, I have a problem with using read.csv(). I want to read a table from the ONS neighborhood statistics website which has an address: