Forum: Ruby on Rails Problem with exists? method

Hi,

I have a DB with table TABLENAME, column COLUMN and an active resource
client trying to connect to the DB. When i do

Tablename.find(:all) => i get all the entries from the table
But Tablename.exists?(:column => value) always returns false
I verified that the above command works from rails console. Dont
understand why it always returns false even when there are valid
records.

And in the rails server terminal i see a request for this cmd failing as


Started HEAD "/tablenames/columnnamevalue.json" for 127.0.0.1 at Mon Jun
18 13:02:11 -0700 2012

ActionController::RoutingError (No route matches [GET]
"/tablenames/columnnamevalue.json"):
  actionpack (3.2.4)
lib/action_dispatch/middleware/debug_exceptions.rb:21:in `call'
  actionpack (3.2.4)
lib/action_dispatch/middleware/show_exceptions.rb:56:in `call'
  railties (3.2.4) lib/rails/rack/logger.rb:26:in `call_app'
  railties (3.2.4) lib/rails/rack/logger.rb:16:in `call'
  actionpack (3.2.4) lib/action_dispatch/middleware/request_id.rb:22:in
`call'
  rack (1.4.1) lib/rack/methodoverride.rb:21:in `call'
  rack (1.4.1) lib/rack/runtime.rb:17:in `call'

Can anyone tellme why its failing?

On 18 June 2012 21:05, cyber c. <lists@ruby-forum.com> wrote:
> Hi,
>
> I have a DB with table TABLENAME, column COLUMN and an active resource
> client trying to connect to the DB. When i do
>
> Tablename.find(:all) => i get all the entries from the table
> But Tablename.exists?(:column => value) always returns false

Could you point me to some documentation for exists? that shows
passing a column value other than an id? I cannot find any reference
to that.

Colin

Im sorry i have looked at wrong documentation. I have to use find(:all, 
:params)

On Jun 18, 9:57pm, Colin Law <clan...@googlemail.com> wrote:
> Could you point me to some documentation for exists? that shows
> passing a column value other than an id? I cannot find any reference
> to that.
>

http://apidock.com/rails/ActiveRecord/FinderMethod...

has various forms exists? accepts

Fred

Hi Frederick,

Activeresource exists doesnt support conditions i think . Even i got 
confused by activerecord and activeresource exists method.