# Undefined method \`session='+?

**URL:** <https://www.ruby-forum.com/t/undefined-method-session/135974>\
**Category:** Rails\
**Created:** [April 27, 2008, 11:25am UTC](https://www.ruby-forum.com/t/undefined-method-session/135974 "2008-04-27T11:25:13Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![drorchung](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/848f3c/32.png) [@drorchung](https://www.ruby-forum.com/u/drorchung)\
**Post date:** [April 27, 2008, 11:25am UTC](https://www.ruby-forum.com/t/undefined-method-session/135974/1 "2008-04-27T11:25:13Z")

</div>

I bought AWDWR 2nd edition by Dave T… I downgraded to rails 1.2.1  
by:  
sudo gem install --source [http://gems.rubyforge.org](http://gems.rubyforge.org) rails -v 1.2.1  
–include-dependencies

I inserted the following line in environment.rb  
#RAILS\_GEM\_VERSION = ‘2.0.2’ unless defined? RAILS\_GEM\_VERSION  
RAILS\_GEM\_VERSION = ‘1.2.1’

I followed each and every line of the book until p.67/p.68. I started  
the server. I got the following errors.  
=\> Booting Mongrel (use ‘script/server webrick’ to force WEBrick)

=\> Rails application starting on [http://0.0.0.0:3000](http://0.0.0.0:3000)

=\> Call with -d to detach

=\> Ctrl-C to shutdown server

\*\* Starting Mongrel listening at 0.0.0.0:3000

\*\* Starting Rails with development environment…

Exiting

/usr/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/initializer.rb:328:in  
`send': undefined method `session=’ for ActionController::Base:Class  
(NoMethodError)

```
    from

```

/usr/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/initializer.rb:328:in  
`initialize\_framework\_settings’

```
    from

```

/usr/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/initializer.rb:327:in `each’

```
    from

```

/usr/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/initializer.rb:327:in  
`initialize\_framework\_settings’

```
    from

```

/usr/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/initializer.rb:324:in `each’

```
    from

```

/usr/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/initializer.rb:324:in  
`initialize\_framework\_settings’

```
    from

```

/usr/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/initializer.rb:96:in  
`process’

```
    from

```

/usr/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/initializer.rb:43:in `send’

```
    from

```

/usr/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/initializer.rb:43:in `run’

```
     ... 27 levels...

    from

```

/usr/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/commands/server.rb:39

```
    from

```

/usr/local/lib/site\_ruby/1.8/rubygems/custom\_require.rb:27:in  
`gem\_original\_require’

```
    from

```

/usr/local/lib/site\_ruby/1.8/rubygems/custom\_require.rb:27:in `require’

```
    from script/server:3

```

What is wrong with my copying work?  
Thanks for your help.

---

<div class="post-metadata">

**Author:** ![drorchung](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/848f3c/32.png) [@drorchung](https://www.ruby-forum.com/u/drorchung)\
**Post date:** [April 27, 2008, 12:46pm UTC](https://www.ruby-forum.com/t/undefined-method-session/135974/2 "2008-04-27T12:46:28Z")

</div>

On 27 Apr 2008, at 10:25, Dror C. wrote:

> What is wrong with my copying work?  
> Thanks for your help.

I’m guessing the app itself was generated with rails 2.0.x, which  
means that the generated environment.rb and boot.rb will contain 2.0  
specific things. You’re probably best off running  
rails _1.2.1_ my\_app\_name to generate you a fresh 1.2.1 rails  
application.

Fred