Ruby on Rails Development
Sunday, May 21, 2006
Working with Boolean Fields
Creation:
Active Record migrations are quite good at creating tables. The below migration will add table "table" to the db with a boolean field a_boolean when rake db:migrate is run.
class CreateTable < ActiveRecord::Migration
def self.up
create_table :table do |t|
t.column :a_boolean, :boolean
end
end
def self.down
drop_table :table
end
end
Boolean Form Field Select Helper:
The following line creates a select box with true and false represented by Yes and No. The currently selected value (while editing) is automatically selected.
<%= select('table', 'a_boolean', [["Yes",true],["No",false]]) %>
Validation:
validates_each :a_boolean do |record, attr, value|
record.errors.add attr, 'is invalid.' if value != true && value != false
end
2:26 PM posted by J. Michael Cunningham
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