You can run the following command: 
script/dbconsole

And then manually drop the sessions table (drop sessions). Then try full 
rollbacks and migrations again. 

Sent from my iPhone

On Jul 30, 2010, at 2:36 AM, Rick R <[email protected]> wrote:

> I'm sure this is total newb (since I am pretty newb) but I'm curious what the 
> issue is here. I attempt to role back all my migrations which I'm doing with
> 
> rake db:migrate VERSION=0
> (in /Users/rick/projects/rails/sillymeters)
> ==  CreateSessions: never migrated, skipping 
> ==================================
> 
> ==  CreateUsers: reverting 
> ====================================================
> -- drop_table(:users)
>    -> 0.0011s
> ==  CreateUsers: reverted (0.0012s) 
> ===========================================
> 
> ==  CreateMeters: reverting 
> ===================================================
> -- drop_table(:meters)
>    -> 0.0008s
> ==  CreateMeters: reverted (0.0009s) 
> ==========================================
> 
> etc..
> 
> Note the first one says "CreateSessions: never migrated, skipping"
> 
> When I then go to run the migrations, most go through fine, but then  I get 
> the following error when it tries to run the CreateSessions migration:
> 
>  ~/projects/rails/sillymeters(master) $ rake db:migrate
> (in /Users/rick/projects/rails/sillymeters)
> ==  CreateSessions: migrating 
> =================================================
> -- create_table(:sessions)-
> rake aborted!
> An error has occurred, this and all later migrations canceled:
> 
> SQLite3::SQLException: table "sessions" already exists: CREATE TABLE 
> "sessions" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "session_id" 
> varchar(255) NOT NULL, "data" text, "created_at" datetime, "updated_at" 
> datetime) 
> 
> 
> I'm assuming that each application has its own instance of SQLLite so I'm 
> curious how this error is occurring or what I need to do to fix it. I 'think' 
> I might be getting this because it's possible I did at one point have a 
> similar migration that created the Session table, but then I deleted that 
> migration and created it as a new one with a new name. The table name was the 
> same though "sessions" so I don't get what is going on.
> 
> The migration in question looks like:
> 
> class CreateSessions < ActiveRecord::Migration
>   def self.up
>     create_table :sessions do |t|
>       t.string :session_id, :null => false
>       t.text :data
>       t.timestamps
>     end
> 
>     add_index :sessions, :session_id
>     add_index :sessions, :updated_at
>   end
> 
>   def self.down
>     drop_table :sessions
>   end
> end
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