Hi,
It has been so long writing a post and for a change this time it not my laziness but had been really occupied from office front.
Anyhow, here is one strange thing that I found with "form_for" in Rails2 and Rails3.
In Rails2, if we have a class in ruby (not derived from Activerecord::Base) some thing like the one below..
class SomeRubyClass
attr_accessor :file_name, :file_data, :class_name, :error
def initialize(file_name, file_data, class_name, error)
@file_name = file_name
@file_data = file_data
@class_name = class_name
@error = error
end
def self.first
#Some code, which will give an object
end
end
We can use form_for with it something like this
class SomeController < ApplicationController
def index
@some_ruby_class = SomeRubyClass.new("file_name", "file_data", "class_name", "error")
end
def create
@some_ruby_class = SomeRubyClass.first
@some_ruby_class.class_name = params[:some_ruby_class][:class_name]
@some_ruby_class.file_name = params[:some_ruby_class][:file_name]
#some more code
redirect_to :back
end
end
<% form_for @some_ruby_class, :url => {:action => :create} do |f| %>
<%= f.text_field :class_name %>
<%= f.text_field :file_name %>
<%= f.submit 'Update' %>
<% end %>
and we can do manipulation as per the need.
But in Rails3 this thing is not supported with form_for
It gives exception like...
undefined method `model_name' for SomeRubyClass:Class'
and to make it work we have to add these lines
1. extend ActiveModel::Naming
2. add to_key instance method which must return an array
so added it and result is something like this
class SomeRubyClass
extend ActiveModel::Naming
attr_accessor :file_name, :file_data, :class_name, :error
def initialize(file_name, file_data, class_name, error)
@file_name = file_name
@file_data = file_data
@class_name = class_name
@error = error
end
def self.first
#Some code, which will give an object
end
def to_key
["some_key", "some_value"]
end
end
and it works! Now question arises, Rails3 is imposing me to use ActiveModel (which was initially meant to provide ActiveRecord base type facilities like validation etc.) for simple things like form_for why?? am I missing something here.
