#3732 Undefined method `adapter_name' on GET request - Ruby on Rails

Type	To find
responsible:me	tickets assigned to you
tagged:"@high"	tickets tagged @high
milestone:next	tickets in the upcoming milestone
state:invalid	tickets with the state invalid
created:"last week"	tickets created last week
sort:number, importance, updated	tickets sorted by #, importance or updated
Combine keywords for powerful searching.
Use advanced searching »

This project is archived and is in readonly mode.

#3732 ✓invalid

Undefined method `adapter_name' on GET request

Reported by Conrad Taylor | January 18th, 2010 @ 02:30 AM

I'm seeing the following in the development logs when I perform a GET request:

Processing "/posts" to */* (for 127.0.0.1 at 2010-01-17 18:12:05) [GET]

NoMethodError (undefined method `adapter_name' for {:engine=>#<Arel::Sql::Engine:0x1b33188 @ar=ActiveRecord::Base>}:Hash):
  app/controllers/posts_controller.rb:5:in `index'

In order to generate the my project, I performed the following steps:

$ rails blog-3.0.0
$ cd blog-3.0.0
$ script/generate scaffold post title:string blog:text
$ rake db:migrate
$ script/server

Now, navigate to the URL, http:://localhost:3000/posts, and one should be able to see the above message in the 'development.log' file.

I have the following configuration:

OS:  Mac OS 10.5.8 (PPC)
ruby 1.9.2dev (2010-01-18 trunk 26340) [powerpc-darwin9.8.0]

Lastly, my Gemfile contains the following:

gem "rails", "3.0.pre"

## Bundle edge rails:
# gem "rails", :git => "git://github.com/rails/rails.git"

## Bundle the gems you use:
gem "sqlite3-ruby", :require_as => "sqlite3"

Comments and changes to this ticket

Rizwan Reza January 18th, 2010 @ 02:36 AM
You'll need to follow the instructions posted here: http://weblog.rubyonrails.org/2010/1/1/getting-a-new-app-running-on....

If you find that there is error afterwards, please reply by saying so. Thanks.
You flagged this item as spam.
Conrad Taylor January 18th, 2010 @ 02:54 AM
Rizwan, I seeing the same error in the logs after following steps as indicated here:

http://weblog.rubyonrails.org/2010/1/1/getting-a-new-app-running-on...
You flagged this item as spam.
mgutz January 19th, 2010 @ 03:56 AM
Looks to be an issue with arel dependency. Adding this line to Gemfile in generated app root worked for me.
```
  gem 'arel', :git => 'git://github.com/rails/arel.git'
```
You flagged this item as spam.
Conrad Taylor January 19th, 2010 @ 04:40 AM
- Tag changed from “rails3, ruby1.9.2” to “bundler, rails3, ruby1.9.2”
Yes, there's an issue with the dependency mechanism because the first line of the Gemfile bundles the arel gem with the application. Also, I confirmed that your solution does work within my environment.
You flagged this item as spam.
Pablo Formoso Estrada January 19th, 2010 @ 06:15 PM
I'm having the same issue. I try to solve it adding the arel gem to the Gemfile and thats not work for me.
http://localhost:3000/posts/new load correctly but when submiting form this error is shown:

undefined method columns' for #<Hash:0x00000103243f98><br/> app/controllers/posts_controller.rb:47:inblock in create'
app/controllers/posts_controller.rb:46:in create'

It seems not to get the sqlite3 engine...

I've installed ruby-1.9.1p378 with RVM on MacOS 10.6 & my list of gems http://pastie.org/785148

Any ideas?
Rizwan Reza January 20th, 2010 @ 10:28 AM
- Title changed from “[RAILS][3.0pre] undefined method `adapter_name' on GET request” to “Undefined method `adapter_name' on GET request”
Rizwan Reza January 20th, 2010 @ 10:38 AM
- State changed from “new” to “open”
Pablo: please make sure you're using the latest Ruby 1.9.1 release.
Rizwan Reza January 24th, 2010 @ 09:57 PM
- State changed from “open” to “invalid”