Hi  Ken!

If I understand very well  your problem! the database is not
recognizing this collumm. By  want i saw the collum was created  . but
we would have to analize the SQL command in complete. Just a shot!
Maybe in your sql command you are join two tables or more and if is
true you most to specify the origin of the field. Like this:

SELECT T01.FIELD01 , T02.FIELD01
FROM TABLE01 T01 , TABLE02 T02
WHERE T01.FIELD01 = T02.FIELD01

I hope i helped you !

Post the sql command in complete.

Tony Bacellar
[email protected]
delicious.com/tonybacellar

Ken Lim wrote:
> Had this error when trying to add comments to another user's photo.
>
> ActiveRecord::StatementInvalid in User photosController#show
> Mysql::Error: Unknown column 'comments.user_id' in 'on clause': SELECT
> photos.`id` AS t0_r0, photos.`user_id` AS t0_r1, photos.`title` AS
> t0_r2, photos.`body` AS t0_r3, photos.`created_at` AS t0....
>
> I did create a user_id column in the comments as such:
>
> class CreateComments < ActiveRecord::Migration
>   def self.up
>     create_table :comments do |t|
>       t.column :photo_id, :integer
>       t.column :user_id, :integer
>       t.column :guest_name, :string
>       t.column :guest_email, :string
>       t.column :guest_url, :string
>       t.column :body, :text
>       t.column :created_at, :datetime
>     end
>     add_index :comments, :photo_id
>   end
>
>   def self.down
>     drop_table :comments
>   end
> end
>
> Can anyone tell me what went wrong and how to solve?
> --
> Posted via http://www.ruby-forum.com/.
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