Schemer

On-the-fly ActiveRecord schema changes for extremely rapid prototyping.

Description

Loosely define your schema in your ActiveRecord model and have it created and updated for you without worrying about migrations. Useful for when you want to play around with real data handling during prototyping but you really don't care about keeping the data or how it's defined.

WARNING: This will create and delete data definitions on the fly with no warning! Only use this with volatile data! Never attach it to an existing model you care about as it will start adding and dropping columns without your consent!

Usage

class User < ActiveRecord::Base
  schema :username, :password
end

Creates a users table if it doesn't exist, complete with username and password columns the first time you call User.new.

Need another column to play with?

class User < ActiveRecord::Base
  schema :username, :password, :email
end

Adds an email column the next time User.new is called.

Don't want a column anymore?

class User < ActiveRecord::Base
  schema :password, :email
end

Removes the username column the next time User.new is called.

Want a relationship?

class Widget < ActiveRecord::Base
  schema :user_id

  belongs_to :user
end

Works just fine!

NOTE: All columns are created as string columns.

Installation

$ gem sources -a http://gems.github.com (you only have to do this once)
$ sudo gem install citrusbyte-schemer

License

Copyright (c) 2009 Ben Alavi for Citrusbyte

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.