Can't convert String into integer in ruby/ruby-on-rails - ruby

Question

I want to verify if a user exists, and if so, do a password match.
My controller looks like this:
def attempt_login
authorized_user = User.authenticate(params[:username], params[:password])
if authorized_user
flash[:notice] = "Successfully logged in."
redirect_to(:action => 'menu')
else
flash[:notice] = "Invalid username/password"
redirect_to(:action => 'login')
end
end
The model looks like:
def self.authenticate(username="", password="")
user = User.find_by_username(username)
if user && user.password_match?(password)
return user
else
return false
end
end
def password_match?(password="")
hashed_password == User.hash_with_salt(password,salt)
end
In the process of doing this, I receive the TypeError (Can't convert String into Integer). I suspect the error occurs when I want to set a value for authorized_user, but do not know how to approach this issue.
Edit:
My server log is empty. But I can post the Framework Trace:
activesupport (3.0.8) lib/active_support/descendants_tracker.rb:23:in `delete'
activesupport (3.0.8) lib/active_support/descendants_tracker.rb:23:in `block in clear'
activesupport (3.0.8) lib/active_support/descendants_tracker.rb:21:in `each'
activesupport (3.0.8) lib/active_support/descendants_tracker.rb:21:in `clear'
railties (3.0.8) lib/rails/application/bootstrap.rb:59:in `block (2 levels) in <module:Bootstrap>'
activesupport (3.0.8) lib/active_support/callbacks.rb:420:in `_run_call_callbacks'
actionpack (3.0.8) lib/action_dispatch/middleware/callbacks.rb:44:in `call'
rack (1.2.3) lib/rack/sendfile.rb:107:in `call'
actionpack (3.0.8) lib/action_dispatch/middleware/remote_ip.rb:48:in `call'
actionpack (3.0.8) lib/action_dispatch/middleware/show_exceptions.rb:47:in `call'
railties (3.0.8) lib/rails/rack/logger.rb:13:in `call'
rack (1.2.3) lib/rack/runtime.rb:17:in `call'
activesupport (3.0.8) lib/active_support/cache/strategy/local_cache.rb:72:in `call'
rack (1.2.3) lib/rack/lock.rb:11:in `block in call'
<internal:prelude>:10:in `synchronize'
rack (1.2.3) lib/rack/lock.rb:11:in `call'
actionpack (3.0.8) lib/action_dispatch/middleware/static.rb:30:in `call'
railties (3.0.8) lib/rails/application.rb:168:in `call'
railties (3.0.8) lib/rails/application.rb:77:in `method_missing'
railties (3.0.8) lib/rails/rack/log_tailer.rb:14:in `call'
rack (1.2.3) lib/rack/content_length.rb:13:in `call'
rack (1.2.3) lib/rack/handler/webrick.rb:52:in `service'
E:/Ruby192/lib/ruby/1.9.1/webrick/httpserver.rb:111:in `service'
E:/Ruby192/lib/ruby/1.9.1/webrick/httpserver.rb:70:in `run'
E:/Ruby192/lib/ruby/1.9.1/webrick/server.rb:183:in `block in start_thread'
And here is the development.log if it could help:
Started POST "/access/attempt_login" for 127.0.0.1 at 2011-06-27 20:19:19 +0200
DEPRECATION WARNING: config.action_view.debug_rjs will be removed in 3.1, from 3.1 onwards you will need to install prototype-rails to continue to use RJS templates . (called from <top (required)> at G:/Projects/basicsocial/app/controllers/application_controller.rb:1)
Processing by AccessController#attempt_login as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"jvGVYJEypK9sWoaaa5c2OwzBKmCMX7h7Wp28vBH9wfw=", "username"=>"test88", "password"=>"[FILTERED]", "commit"=>"Log In"}
<-[1m<-[36mSQL (7.0ms)<-[0m <-[1mdescribe `users_pages`<-[0m
<-[1m<-[35mSQL (2.0ms)<-[0m SHOW TABLES
<-[1m<-[36mUser Load (0.0ms)<-[0m <-[1mSELECT `users`.* FROM `users` WHERE `users`.`username` = 'test88' LIMIT 1<-[0m
Redirected to http://localhost:3000/admin
Completed 302 Found in 545ms
TypeError (can't convert String into Integer):
Rendered E:/Ruby192/lib/ruby/gems/1.9.1/gems/actionpack-3.0.8/lib/action_dispatch/middleware/templates/rescues/_trace.erb (1.0ms)
Rendered E:/Ruby192/lib/ruby/gems/1.9.1/gems/actionpack-3.0.8/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (5.0ms)
Rendered E:/Ruby192/lib/ruby/gems/1.9.1/gems/actionpack-3.0.8/lib/action_dispatch/middleware/templates/rescues/diagnostics.erb within rescues/layout (16.0ms)
The salt variable is what I use to better secure my user's page. This is something that is stored in the database.

Answer 1

Apparently there was nothing wrong with the code. It was probably related to my browsers cache or something of that nature, as it started working the next day. Sorry for the inconvenience.

Answer 2

I had this same problem and spent hours trying to fix it. It turned out that I had left in a method that the tutorial had told me to delete a few videos beforehand:
def self.hash(password="")
Digest::SHA1.hexdigest(password)
end
In the tutorial, this had been replaced by the methods
def self.make_salt(username="")
Digest::SHA1.hexdigest("Use #{username} with #{Time.now} to make salt")
end
def self.hash_with_salt(password="", salt="")
Digest::SHA1.hexdigest("Put #{salt} on the #{password}")
end
Once I commented this method out, the error went away. I still don't understand why that error showed up in the first place. I added a question and more detail here.

Answer 3

Just want to let you know that i had this problem as well.
The issue was quickly solved but the server showed the error every request afterwards.
Code changes have not been reflected until i restarted the server.
touch tmp/restart.txt was not sufficient so i had to restart the server /etc/init.d/apache2 restart to remove the error message.
$ apache2 -v
Server version: Apache/2.2.16 (Debian)
Server built: Apr 1 2012 07:14:38
$ ruby -v
ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-linux]
$ gem list passenger
*** LOCAL GEMS ***
passenger (3.0.13)
$ bundle exec rails -v
Rails 3.0.7