Inheritance problem in model

rubyonrails-talk
1

You've defined abstract_class? as an instance method rather than as a class method. It's a little less verbose to just do class Item < ActiveRecord::Base self.abstract_class = true end

Fred

2

What's the actual code you've got, the actual error message you get and the database structure of the books table ?

Fred

3

In your initialize you need to call the super class initialize method (AR::Base's initialize sets up some important stuff). Also I seem to recall that there are some issues involved with overriding AR::Base's implementation of initialize. At the very least you need to make your initialize pass through any arguments or block specified to super

Fred

4

Sure you do:

def initialize   @quantity = 1 end

That should probably be

def initialize(*args, &block)   super(*args, &block)   @quantity = 1 end

Or, don't define initialize at all and use an after_initialize callback.

Fred