This is a fairly simple but handy plugin that lets you specify which database connection to use on a per-model basis. It is useful when you have multiple applications sharing the same data.
First lets create a 'shared' database configuration in config/database.yml:
shared:
adapter: mysql
database: shared_database
username: user
password: password
host: dbs_host
Next we tell our model that it should connect the the 'shared' database and use the table there...
class ZipCode < ActiveRecord::Base
# Uses the 'shared' database in all environments
uses_connection :shared, :in => :all
end
... and voila, the next time you do
ZipCode.find(:first)
or any other interaction with the ZipCode model it will use the zip_codes table in your shared database! In other words, this is just a nicer way to use "Model.establish_connection(database)".
# === options:
# :in:: Accepts an array or a single symbol describing the environment it
# should use the connection for. Examples:
#
# class Book < ActiveRecord::Base
# # Uses the 'shared' database in all environments
# uses_connection :shared, :in => :all
#
# # Uses the 'shared' database in the production environment
# uses_connection :shared, :in => :production
#
# # Uses the 'shared' database in the production and development environments
# uses_connection :shared, :in => [:production, :development]
# end
#
#
# :except:: Ignores the call if the current environment matches the array
# or the single symbol used to describe the environment.
#
# class Book < ActiveRecord::Base
# # Skips the plugin for the development environment
# uses_connection :shared, :in => :all, :except => :development
#
# # Skips the plugin for the development and test environments
# uses_connection :shared, :in => :all, :except => [:development, :test]
# end
Thiago Jackiw: tjackiw at gmail dot com
Released under the MIT license.
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