clean rails3 app raises ActiveRecord::ConnectionNotEstablished about delayed_job_active_record

[theyagarajan]

I'm having the same error too!

[amitsaxena]

I am also having the same issue and have verified that the error goes away when I remove "gem 'delayed_job_active_record'" from the Gemfile.

ruby 1.8.7 (2011-06-30 patchlevel 352) [i686-linux]
Rails 3.0.0
delayed_job (3.0.0)
delayed_job_active_record (0.3.1)

trace:
$script/rails generate delayed_job:active_record --trace
/usr/lib/ruby/gems/1.8/gems/activerecord-3.0.0/lib/active_record/connection_adapters/abstract/connection_pool.rb:318:in retrieve_connection': ActiveRecord::ConnectionNotEstablished (ActiveRecord::ConnectionNotEstablished) from /usr/lib/ruby/gems/1.8/gems/activerecord-3.0.0/lib/active_record/connection_adapters/abstract/connection_specification.rb:97:inretrieve_connection'
from /usr/lib/ruby/gems/1.8/gems/activerecord-3.0.0/lib/active_record/connection_adapters/abstract/connection_specification.rb:89:in connection' from /usr/lib/ruby/gems/1.8/gems/arel-1.0.1/lib/arel/engines/sql/engine.rb:9:inconnection'
from /usr/lib/ruby/gems/1.8/gems/arel-1.0.1/lib/arel/engines/sql/relations/table.rb:37:in initialize' from /usr/lib/ruby/gems/1.8/gems/activerecord-3.0.0/lib/active_record/base.rb:850:innew'
from /usr/lib/ruby/gems/1.8/gems/activerecord-3.0.0/lib/active_record/base.rb:850:in arel_table' from /usr/lib/ruby/gems/1.8/gems/activerecord-3.0.0/lib/active_record/base.rb:896:inrelation'
from /usr/lib/ruby/gems/1.8/gems/activerecord-3.0.0/lib/active_record/named_scope.rb:32:in scoped' from /usr/lib/ruby/gems/1.8/gems/activerecord-3.0.0/lib/active_record/base.rb:441:inorder'
from /usr/lib/ruby/gems/1.8/gems/delayed_job_active_record-0.3.1/lib/delayed/backend/active_record.rb:25
from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:239:in require' from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:239:inrequire'
from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:225:in load_dependency' from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:591:innew_constants_in'
from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:225:in load_dependency' from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:239:inrequire'
from /usr/lib/ruby/gems/1.8/gems/delayed_job_active_record-0.3.1/lib/delayed_job_active_record.rb:3
from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.21/lib/bundler/runtime.rb:68:in require' from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.21/lib/bundler/runtime.rb:68:inrequire'
from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.21/lib/bundler/runtime.rb:66:in each' from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.21/lib/bundler/runtime.rb:66:inrequire'
from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.21/lib/bundler/runtime.rb:55:in each' from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.21/lib/bundler/runtime.rb:55:inrequire'
from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.21/lib/bundler.rb:122:in require' from <RAILS_ROOT>/config/application.rb:6 from /usr/lib/ruby/gems/1.8/gems/railties-3.0.0/lib/rails/commands.rb:15:inrequire'
from /usr/lib/ruby/gems/1.8/gems/railties-3.0.0/lib/rails/commands.rb:15
from script/rails:6:in `require'
from script/rails:6

[pcreux]

Same issue here with delayed_job_active_record 0.3.2. (Rails 3.0.0 on ree.)

[pcreux]

@nessence Which version of rails are you running?

[nessence]

@pcreux 3.0.0

[tehtorq]

Could this be related to rails/rails#783 ?

[vida]

I'm having this problem too - has anyone solved this?

[guiocavalcanti]

+1

[guiocavalcanti]

This is an Rails 3 ActiveRecord problem as reported on this issue. To sum it up, AR tries to validate the scope at require time, which doesn't make any sense because there is no connection established yet.

The simple workaround is to define the scope inside a class method in order to delay it's validation to runtime. I'll submit a patch to solve this problem.

[rpk]

Is there a workaround for this issue we can use until a new gem is pushed? We're stuck on Rails 3.0.

[sferik]

@bryckbost is currently the only person who is authorized to push new delayed_job_active_record gems. (If Brian adds me as an owner, I'd be happy to build and push a new release for you.) In the mean time, you can update your Gemfile to fetch delayed_job_active_record from Git:

gem 'delayed_job_active_record', :git => 'git://github.com/collectiveidea/delayed_job_active_record.git'

[ernsheong]

This problem is still not fixed. @sferik's solution works though. however, replace it with the latest gem version breaks it

[sferik]

I'll push a new gem version this weekend.

[sferik]

Shiped it!