attr-accessor

Just wondering if anyone can shed some light on the basics of getter setters in Ruby on Rails with a view on strongly typed. I am very new to ruby on rails and predominately have a good understanding of .NET. For example, let's consider we have a .net class called Person class Person { public string Firstname{get;set;} public string Lastname{get;set;} public Address HomeAddress{get;set;} } class Address { public string AddressLine1{get;set;} public string City{get;set;} public string Country{get;set;} } In Ruby, I would write this as class Person attr_accessor :FirstName attr_accessor

I'm using rails and I want to make it so that attr_accessor :politics is set, by default, to false. Does anyone know how to do this and is able to explain it in simple terms for me? Rails has attr_accessor_with_default so you could write class Like attr_accessor_with_default :politics,false end i = Like.new i.politics #=> false and thats all UPDATE attr_accessor_with_default has been deprecated in Rails 3.2.. you could do this instead with pure Ruby class Like attr_writer :politics def politics @politics || false end end i = Like.new i.politics #=> false If you define your attr_accessor, by

I'm trying to generate the attr_reader from a hash (with nested hash) so that it mirror the instance_variable creation automatically. here is what i have so far: data = {:@datetime => '2011-11-23', :@duration => '90', :@class => {:@price => '£7', :@level => 'all'}} class Event #attr_reader :datetime, :duration, :class, :price, :level def init(data, recursion) data.each do |name, value| if value.is_a? Hash init(value, recursion+1) else instance_variable_set(name, value) #bit missing: attr_accessor name.to_sym end end end But i can't find out a way to do that :( You need to call the (private)

What happens in the background with the following code? class User < ActiveRecord::Base attr_accessor :name attr_accessible :name end Hint: When instantiating the class, will it be persisted to the database? Why or why not? attr_accessor is ruby code and is used when you do not have a column in your database, but still want to show a field in your forms. The only way to allow this is to attr_accessor :fieldname and you can use this field in your View, or model, if you wanted, but mostly in your View. attr_accessible allows you to list all the columns you want to allow Mass Assignment, as andy