#2577 When using ActiveRecord::Associations outside of Rails, a NameError is thrown - Ruby on Rails

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#2577 open

When using ActiveRecord::Associations outside of Rails, a NameError is thrown

Reported by danielh | April 28th, 2009 @ 03:20 PM | in 3.x

Here's an example irb session:

irb(main):002:0> require 'rubygems' => true irb(main):003:0> require 'active_record' => true irb(main):004:0> ActiveRecord => ActiveRecord irb(main):005:0> ActiveRecord::Associations NameError: uninitialized constant ActiveRecord::Associations

from /usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/dependencies.rb:440:in `load_missing_constant'
from /usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/dependencies.rb:80:in `const_missing'
from /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/base.rb:3144
from /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/base.rb:3137:in `class_eval'
from /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/base.rb:3137
from /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/associations.rb:2
from (irb):6
from :0

This happens because ruby loads the associations.rb file, which references ActiveRecordError before defining the Associations module. ActiveRecordError is defined in base.rb, which tries to include the Association module before it's been defined.

Patch attached.

associations_fix.diff 9.7 KB

Comments and changes to this ticket

Elijah Miller June 6th, 2009 @ 04:43 PM

+1 Applies cleanly to 2-3-stable and works, all tests pass.

No test cases are provided for this issue but here is a command to test. Run within activerecord/lib.

ruby -e "require 'activerecord'; ActiveRecord::Associations; puts 'pass'"

Before patch:

./../../activesupport/lib/active_support/dependencies.rb:440:in `load_missing_constant': uninitialized constant ActiveRecord::Associations (NameError)
    from ./../../activesupport/lib/active_support/dependencies.rb:80:in `const_missing'
    from ./active_record/base.rb:3139
    from ./active_record/base.rb:3132:in `class_eval'
    from ./active_record/base.rb:3132
    from ./active_record/associations.rb:2
    from -e:1

After patch:

pass

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Elijah Miller June 6th, 2009 @ 05:34 PM
For now a simple work-around is to reference ActiveRecord::ActiveRecordError before ActiveRecord::Associations
```
require 'activerecord'
ActiveRecord::ActiveRecordError
# now you can use ActiveRecord::Associations
```
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Murray Steele August 5th, 2009 @ 05:32 PM
- Tag changed from “2.3.2, activerecord, association” to “2.3.x, 3.0, activerecord, association”
The same is true if you try to use ActiveRecord::Validations. The similarities are that both active_record/validations.rb and active_record/associations.rb both define ActiveRecordError subclasses before they define their Validations and Associations modules.

Note really sure what the fix is. It also affects 3.0.

ggwang December 1st, 2009 @ 12:03 AM

Tag changed from “2.3.x, 3.0, activerecord, association” to “2, 3, activerecord, association”

It seems to be same problem, the following is #3528 I added just now:

I am intending to have a try to use CMS ansuz(http://www.ansuzcms.com/). But Ijust can not make it get to work. When ever start up the webtick server, or try to migrate its database(yml setting finished), it shows:

=> Booting WEBrick => Rails 2.3.5 application starting on http://0.0.0.0:3000 /home/ggwang/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:440:in load_missing_constant': uninitialized constant ActiveRecord::Associations (NameError)

from /home/ggwang/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:80:in `const_missing'
from /home/ggwang/.gem/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/base.rb:3154
from /home/ggwang/.gem/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/base.rb:3147:in `class_eval'
from /home/ggwang/.gem/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/base.rb:3147
from /home/ggwang/.gem/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/associations.rb:2
from /home/ggwang/ansuz/lib/isotope11/active_record_extensions.rb:2
from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
from /home/ggwang/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require'
from /home/ggwang/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:521:in `new_constants_in'
from /home/ggwang/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require'
from /home/ggwang/ansuz/config/environments/development.rb:24:in `load_environment'
from /home/ggwang/.gem/ruby/1.8/gems/rails-2.3.5/lib/initializer.rb:386:in `load_environment'
from /home/ggwang/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/core_ext/kernel/reporting.rb:11:in `silence_warnings'
from /home/ggwang/.gem/ruby/1.8/gems/rails-2.3.5/lib/initializer.rb:379:in `load_environment'
from /home/ggwang/.gem/ruby/1.8/gems/rails-2.3.5/lib/initializer.rb:137:in `process'
from /home/ggwang/.gem/ruby/1.8/gems/rails-2.3.5/lib/initializer.rb:113:in `send'
from /home/ggwang/.gem/ruby/1.8/gems/rails-2.3.5/lib/initializer.rb:113:in `run'
from /home/ggwang/ansuz/config/environment.rb:39
from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
from /home/ggwang/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require'
from /home/ggwang/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:521:in `new_constants_in'
from /home/ggwang/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require'
from /home/ggwang/.gem/ruby/1.8/gems/rails-2.3.5/lib/commands/server.rb:84
from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
from script/server:3

ggwang@ggwang-laptop:~/ansuz$ ruby script/server
=> Booting WEBrick => Rails 2.3.5 application starting on http://0.0.0.0:3000 /home/ggwang/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:440:in load_missing_constant': uninitialized constant ActiveRecord::Associations (NameError)

from /home/ggwang/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:80:in `const_missing'
from /home/ggwang/.gem/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/base.rb:3154
from /home/ggwang/.gem/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/base.rb:3147:in `class_eval'
from /home/ggwang/.gem/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/base.rb:3147
from /home/ggwang/.gem/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/associations.rb:2
from /home/ggwang/ansuz/lib/isotope11/active_record_extensions.rb:2
from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
from /home/ggwang/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require'
from /home/ggwang/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:521:in `new_constants_in'
from /home/ggwang/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require'
from /home/ggwang/ansuz/config/environments/development.rb:24:in `load_environment'
from /home/ggwang/.gem/ruby/1.8/gems/rails-2.3.5/lib/initializer.rb:386:in `load_environment'
from /home/ggwang/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/core_ext/kernel/reporting.rb:11:in `silence_warnings'
from /home/ggwang/.gem/ruby/1.8/gems/rails-2.3.5/lib/initializer.rb:379:in `load_environment'
from /home/ggwang/.gem/ruby/1.8/gems/rails-2.3.5/lib/initializer.rb:137:in `process'
from /home/ggwang/.gem/ruby/1.8/gems/rails-2.3.5/lib/initializer.rb:113:in `send'
from /home/ggwang/.gem/ruby/1.8/gems/rails-2.3.5/lib/initializer.rb:113:in `run'
from /home/ggwang/ansuz/config/environment.rb:39
from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
from /home/ggwang/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require'
from /home/ggwang/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:521:in `new_constants_in'
from /home/ggwang/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require'
from /home/ggwang/.gem/ruby/1.8/gems/rails-2.3.5/lib/commands/server.rb:84
from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
from script/server:3

I took referenced to the ticket #2577 and thought maybe that was the problem. I tried to use the patch file attached but could not make it work. The following is my gem list:

    *** LOCAL GEMS ***

actionmailer (2.3.5, 2.2.2)
actionpack (2.3.5, 2.3.2, 2.2.2)
activerecord (2.3.5, 2.3.2, 2.2.2)
activeresource (2.3.5, 2.2.2)
activesupport (2.3.5, 2.3.4, 2.3.2, 2.2.2)
BlueCloth (1.0.1)
calendar_date_select (1.15)
cmdparse (2.0.2)
datanoise-actionwebservice (2.3.2)
facets (2.4.5)
maruku (0.5.9)
mislav-will_paginate (2.2.3)
mocha (0.9.8)
mysql (2.8.1)
rack (1.0.1)
rails (2.3.5, 2.2.2)
rake (0.8.7)
rdoc (2.4.3)
RedCloth (4.2.2)
rubygems-update (1.3.5)
rubyist-aasm (2.0.7)
sqlite3-ruby (1.2.5)
syntax (1.0.0)
webgen (0.5.10)
will_paginate (2.3.11, 2.2.2)

And, I followed the ticket to test in irb and it shows:

:~/ansuz$ ruby -e "require 'rubygems';require 'active_record'; ActiveRecord::Associations; puts 'pass'" /home/ggwang/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:440:in load_missing_constant': uninitialized constant ActiveRecord::Associations (NameError)

from /home/ggwang/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:80:in `const_missing'
from /home/ggwang/.gem/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/base.rb:3154
from /home/ggwang/.gem/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/base.rb:3147:in `class_eval'
from /home/ggwang/.gem/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/base.rb:3147
from /home/ggwang/.gem/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/associations.rb:2
from -e:1

Is it really a bug of rails? Can anyone help me?

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seraphim December 22nd, 2009 @ 06:31 AM
I ran into the same problem... anyone solved the issue?
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PeppyHeppy December 30th, 2009 @ 10:31 AM
ditto
Rizwan Reza January 18th, 2010 @ 01:13 PM
- Tag changed from “2, 3, activerecord, association” to “2, 3, 3.0, activerecord, association”
- Assigned user set to “Pratik”
I can reproduce this in Rails 3 pre.
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Rhett Sutphin April 3rd, 2010 @ 02:28 AM
Seems to me that the lowest-impact fix would be to move ActiveRecordError out of base.rb and into its own file. That would break the autoload cycle (ActiveRecordError loads from base.rb, base.rb loads Associations, Associations loads ActiveRecordError).

In any case, another workaround is to explicitly require 'active_record/base' after requiring 'active_record'.
Jeremy Kemper May 4th, 2010 @ 06:48 PM
- Milestone changed from “2.x” to “3.x”
[bulk edit]
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Andrea Campi October 16th, 2010 @ 11:42 PM
- Tag changed from “2, 3, 3.0, activerecord, association” to “2-3-stable, 3, 3.0, activerecord, association”
- Importance changed from “” to “”
Santiago Pastorino February 2nd, 2011 @ 04:28 PM
- State changed from “new” to “open”
- Tag changed from “2-3-stable, 3, 3.0, activerecord, association” to “2-3-stable, 3, 30, activerecord, association”
This issue has been automatically marked as stale because it has not been commented on for at least three months.

The resources of the Rails core team are limited, and so we are asking for your help. If you can still reproduce this error on the 3-0-stable branch or on master, please reply with all of the information you have about it and add "[state:open]" to your comment. This will reopen the ticket for review. Likewise, if you feel that this is a very important feature for Rails to include, please reply with your explanation so we can consider it.

Thank you for all your contributions, and we hope you will understand this step to focus our efforts where they are most helpful.
Santiago Pastorino February 2nd, 2011 @ 04:28 PM
- State changed from “open” to “stale”

Betelgeuse February 2nd, 2011 @ 05:35 PM

State changed from “stale” to “open”

[state:open]

irb(main):008:0> ActiveRecord::Associations
NameError: uninitialized constant ActiveRecord::Associations
        from /usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.10/lib/active_support/dependencies.rb:466:in `load_missing_constant'
        from /usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.10/lib/active_support/dependencies.rb:106:in `const_missing'
        from /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.10/lib/active_record/base.rb:3207
        from /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.10/lib/active_record/base.rb:3200:in `class_eval'
        from /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.10/lib/active_record/base.rb:3200
        from /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.10/lib/active_record/associations.rb:2
        from (irb):8

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bingbing March 26th, 2011 @ 02:14 AM
louis vuitton watches
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daviejacob March 28th, 2011 @ 04:42 PM
After read this post i want to keep coming here again and again.Thanks a lot. buy facebook fans

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associations_fix.diff 9.7 KB

Referenced by

3528 Regarding to #2577 , something wrong with my associations.rb I took referenced to the ticket #2577 and thought maybe t...
2577 When using ActiveRecord::Associations outside of Rails, a NameError is thrown I took referenced to the ticket #2577 and thought maybe t...
3528 Regarding to #2577 , something wrong with my associations.rb The issue you've run into here isn't strictly related to ...

Rails Ruby on Rails → 3.x

When using ActiveRecord::Associations outside of Rails, a NameError is thrown

Comments and changes to this ticket

Elijah Miller June 6th, 2009 @ 04:43 PM

Elijah Miller June 6th, 2009 @ 05:34 PM

Murray Steele August 5th, 2009 @ 05:32 PM

ggwang December 1st, 2009 @ 12:03 AM

seraphim December 22nd, 2009 @ 06:31 AM

PeppyHeppy December 30th, 2009 @ 10:31 AM

Rizwan Reza January 18th, 2010 @ 01:13 PM

Rhett Sutphin April 3rd, 2010 @ 02:28 AM

Jeremy Kemper May 4th, 2010 @ 06:48 PM

Andrea Campi October 16th, 2010 @ 11:42 PM

Santiago Pastorino February 2nd, 2011 @ 04:28 PM

Santiago Pastorino February 2nd, 2011 @ 04:28 PM

Betelgeuse February 2nd, 2011 @ 05:35 PM

bingbing March 26th, 2011 @ 02:14 AM

daviejacob March 28th, 2011 @ 04:42 PM

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When using ActiveRecord::Associations outside of Rails, a NameError is thrown

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