This Rails plugin makes a find method available at the class level in ApplicationController which takes the name of an ActiveRecord model. Using this method creates a before filter which finds an ActiveRecord instance and assigns it to an appropriately named instance variable in the controller. The name of the model passed to find is used for both the key in params assumed to contain the ID of the record to find as well as the name of the instance variable to assign it to. This behavior can be customized any which way via options. An 404 HTTP code will be returned and the corresponding error page rendered for non-existent records via the http-error gem.
Full documentation is at RubyDoc.info.
The following example assumes the request for the delete action has an :id or :user param passed to it with the ID of the user to delete.
class UserController < ApplicationController
find(:user)
def delete
@user.destroy
end
end
The following example assumes the request for the delete action has a :user_id param passed to it with the ID of the user to delete.
class UserController < ApplicationController
find(:user, :param => :user_id)
def delete
@user.destroy
end
end
class UserController < ApplicationController
find(:user, :variable => :user_to_delete)
def delete
@user_to_delete.destroy
end
end
class UserController < ApplicationController
find(:user)
def delete
@user.destroy
end
protected
def find_user
User.find_by_email(params[:email])
end
end
The find can be restricted to specific actions the same way a typical before filter can be—in fact, any options passed to find are simply passed through to before_filter.
class UserController < ApplicationController
find(:user, :only => :delete)
def delete
@user.destroy
end
def something_else
render(:text => 'Something else.')
end
end
If you like this gem, you may also want to check out Create New, Save Changes To, or HTTP Error.
- Rails 3.0.5 — 20 May 2011
To send patches, please fork on GitHub and submit a pull request.
© 2011 Cody Robbins. See LICENSE for details.