Jeremy Walker wrote in post #1059759:
> On 6 May 2012 22:13, Guillem Vidal <li...@ruby-forum.com> wrote:
>
>> > You could just reopen ActiveRecord::Base. Create a new initializer (a
>> > http://www.ihid.co.uk
>> end
>> end
>>
>
> OK, so two more suggestions:
> 1) Use an after_initialize block in your config (
> http://guides.rubyonrails.org/configuring.html#rails-general-configuration)
> to call your method_creation code.
> 2) Re-open the class (as per my prev suggestion) but write a
> create_association_tokens method that contains the code to define your
> reflected methods, and use ActiveRecord::Base's after_initialize method
> to
> call that method on an object, thus creating your methods on an
> object-by-object basis, rather than for the class.
>
> I'm intrigued by the point of all this?
Sorry about the delay, I couldn't access to a computer since now :(.
Done it, but it raises me an error because i have a attr_writer, i need
to initialize the method.
module MyModule
def self.included(base)
base.send(:extend, InstanceMethods)
base.send(:after_initialize, :set_reader_writer_tokens)
end
module InstanceMethods
def set_reader_writer_tokens
class.reflect_on_all_associations.each do |association|
class.send(:define_method,"#{association.name.to_s}_tokens") do
attribute(__method__)
end
self.class.send(:define_method,
"#{association.name.to_s}_tokens=") do |value|
write_attribute(__method__, self.another_custom_method)
end
end
end
end
ActiveRecord::Base.send(:include, MyModule)
Loading development environment (Rails 3.2.2)
class OptionType < ActiveRecord::Base
belongs_to :type
end
OptionType.new(:type_tokens => "ba,b")
raises an unknown attribute :type_tokens.
But if I first initialize the record withouth accessing to the
attribute:
> OptionType.new
=> #<OptionType ...>
> OptionType.new(:type_tokens => "ba,b")
=> #<OptionType id: nil, name: nil, presentation: nil, created_at: nil,
updated_at: nil>
Then I can done it. The problem is that I need to set up that attribute
before the initialitzation of the class.
Is a very good approach, but still not enogh for a ruby on rails
application.
Maybe it can be done using method_missing... but I'm a little bit scared
of overwriting activerecord method_missing, also it's not clear.
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