validates_uniqueness_of fails on STI in Rails 2.3.2

rubyonrails-talk
1

I've got something like this:

class Position < ActiveRecord::Base end

class CartItem < Position     validates_uniqueness_of :product_id end

When I try to save CartItem I get this error:

ArgumentError: wrong number of arguments (1 for 2)   from /home/joaz/.gem/ruby/1.8/gems/activerecord-2.3.2/lib/active_record/validations.rb:758:in `exists?'   from /home/joaz/.gem/ruby/1.8/gems/activerecord-2.3.2/lib/active_record/validations.rb:758:in `validates_uniqueness_of'   from /home/joaz/.gem/ruby/1.8/gems/activerecord-2.3.2/lib/active_record/base.rb:2148:in `with_scope'   from /home/joaz/.gem/ruby/1.8/gems/activerecord-2.3.2/lib/active_record/base.rb:2156:in `with_exclusive_scope'   from /home/joaz/.gem/ruby/1.8/gems/activerecord-2.3.2/lib/active_record/validations.rb:757:in `validates_uniqueness_of'   from /home/joaz/.gem/ruby/1.8/gems/activerecord-2.3.2/lib/active_record/validations.rb:399:in `validates_each'   from /home/joaz/.gem/ruby/1.8/gems/activerecord-2.3.2/lib/active_record/validations.rb:396:in `each'   from /home/joaz/.gem/ruby/1.8/gems/activerecord-2.3.2/lib/active_record/validations.rb:396:in `validates_each'   from /home/joaz/.gem/ruby/1.8/gems/activesupport-2.3.2/lib/active_support/callbacks.rb:182:in `call'   from /home/joaz/.gem/ruby/1.8/gems/activesupport-2.3.2/lib/active_support/callbacks.rb:182:in `evaluate_method'   from /home/joaz/.gem/ruby/1.8/gems/activesupport-2.3.2/lib/active_support/callbacks.rb:166:in `call'   from /home/joaz/.gem/ruby/1.8/gems/activesupport-2.3.2/lib/active_support/callbacks.rb:90:in `run'   from /home/joaz/.gem/ruby/1.8/gems/activesupport-2.3.2/lib/active_support/callbacks.rb:90:in `each'   from /home/joaz/.gem/ruby/1.8/gems/activesupport-2.3.2/lib/active_support/callbacks.rb:90:in `send'   from /home/joaz/.gem/ruby/1.8/gems/activesupport-2.3.2/lib/active_support/callbacks.rb:90:in `run'   from /home/joaz/.gem/ruby/1.8/gems/activesupport-2.3.2/lib/active_support/callbacks.rb:276:in `run_callbacks'   from /home/joaz/.gem/ruby/1.8/gems/activerecord-2.3.2/lib/active_record/validations.rb:1029:in `valid_without_callbacks?'   from /home/joaz/.gem/ruby/1.8/gems/activerecord-2.3.2/lib/active_record/callbacks.rb:315:in `valid?'   from /home/joaz/.gem/ruby/1.8/gems/activerecord-2.3.2/lib/active_record/validations.rb:1008:in `save_without_dirty'   from /home/joaz/.gem/ruby/1.8/gems/activerecord-2.3.2/lib/active_record/dirty.rb:79:in `save_without_transactions'   from /home/joaz/.gem/ruby/1.8/gems/activerecord-2.3.2/lib/active_record/transactions.rb:229:in `send'   from /home/joaz/.gem/ruby/1.8/gems/activerecord-2.3.2/lib/active_record/transactions.rb:229:in `with_transaction_returning_status'   from /home/joaz/.gem/ruby/1.8/gems/activerecord-2.3.2/lib/active_record/connection_adapters/abstract/database_statements.rb:136:in `transaction'   from /home/joaz/.gem/ruby/1.8/gems/activerecord-2.3.2/lib/active_record/transactions.rb:182:in `transaction'   from /home/joaz/.gem/ruby/1.8/gems/activerecord-2.3.2/lib/active_record/transactions.rb:228:in `with_transaction_returning_status'   from /home/joaz/.gem/ruby/1.8/gems/activerecord-2.3.2/lib/active_record/transactions.rb:196:in `save'   from /home/joaz/.gem/ruby/1.8/gems/activerecord-2.3.2/lib/active_record/transactions.rb:208:in `rollback_active_record_state!'   from /home/joaz/.gem/ruby/1.8/gems/activerecord-2.3.2/lib/active_record/transactions.rb:196:in `save'

Putting validates_uniqueness_of in the Position model works fine. It doesn't work in any inherited class. This seems to be a regression issue on Rails 2.3, works fine on previous rails versions.

2

What other plugins are you using? Something weird is going on, as the code at pointed to by the exception trace calls exists? with one argument, which is what it expects.

--Matt Jones

3

Matt Jones wrote:

What other plugins are you using? Something weird is going on, as the code at pointed to by the exception trace calls exists? with one argument, which is what it expects.

gems included in config: mislav-will_paginate memcache-client

vendor/plugins (error occours also after renaming the vendor directory)

acts_as_acl acts_as_tree better_nested_set view_model

In fact, I get the same error on a fresh rails installation.