Call child's method or cast parent to child in Rails

Posted by Brian on Stack Overflow See other posts from Stack Overflow or by Brian
Published on 2010-03-24T07:00:32Z Indexed on 2010/03/24 7:03 UTC
Read the original article Hit count: 477

Filed under:

ruby-on-rails

I have some STI structure like following:

class Box has_many :part,:class_name = "Part" end

class Part def self.dosomething() end end

class TypeA

class TypeB

assuming we have some codes like boxtypeA = Box.new. I am wondering if there is a way to make boxtypeA.part.dosomething() to call TypeA's method not Part's or TypeB's. I think basically what we need to do is to convert the part to TypeA, how can we achieve that?

Thx in advance!

Call child's method or cast parent to child in Rails

Posted by Brian on Stack Overflow See other posts from Stack Overflow or by Brian
Published on 2010-03-24T07:22:42Z Indexed on 2010/03/24 7:53 UTC
Read the original article Hit count: 477

Filed under:

ruby-on-rails

I have some STI structure like following:

class Box
  has_many :part,:class_name = "Part"
end

class Part
  def self.dosomething()
  end
end

class TypeA<Part
  def self.dosomething()
  end
end


class TypeB<Part
  def self.dosomething()
  end
end

assuming we have some codes like boxtypeA = Box.new. I am wondering if there is a way to make boxtypeA.part.dosomething() to call TypeA's method not Part's or TypeB's. I think basically what we need to do is to convert the part to TypeA, how can we achieve that?

Thx in advance!

Related posts about ruby-on-rails

Ruby on Rails - How can I start? [closed]

as seen on Programmers - Search for 'Programmers'
I have misconception in understanding the relationship between Ruby language and Ruby on Rails Framework. Because of 'I am an absolute beginner' in web development I have no idea if I have to grasp the fundamentals of Ruby before I go with Ruby on Rails! I also want to ask who is behind both Ruby… >>> More
Ruby on rails: Image downloads with Authentication/Authorization/Time outs

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi Guys, I'm having few doubts on implementing file downloads. I'm creating an app where I use attachment_fu with Amazon s3 to upload files. Things are working pretty well so far on uploading side. Now its the time to start the file downloads. Here is what I need, a logged in user search and browse… >>> More
DES3 decryption in Ruby on Rails

as seen on Stack Overflow - Search for 'Stack Overflow'
My RoR server receives a string, that was encrypted in C++ application using des3 with base64 encoding The cipher object is created so: cipher = OpenSSL::Cipher::Cipher::new("des3") cipher.key = key_str cipher.iv = iv_str key_str and iv_str: are string representations of key and initialization… >>> More
Ruby on Rails deployment, on "thin" server with lot of attachments

as seen on Stack Overflow - Search for 'Stack Overflow'
A lot of PDFs are stored inside MySQL as a BLOB field for each PDF file. The average file size is 500K each. The Rails app will stream the :binary data as file downloads, where there is a user click on the download link. Assume there is a maximum of 5 users downloading 5 PDFs concurrently, what… >>> More
Apply Behavior Driven Development to Ruby on Rails with Rspec

as seen on Internet.com - Search for 'Internet.com'
Applying the Behavior Driven Development (BDD) methodology to your Rails development takes you beyond traditional Test Driven Development. Learn how to do it with the Ruby-based BDD framework RSpec. >>> More

Developer IT