Andrzej's Rails tips #9

link_to_remote and GET request

If you're working with link_to_remote and you are surprised with a message like the following:

Only get, put, and delete requests are allowed.

then you just need to know that link_to_remote uses POST request by default. All you need is to do is to add :method => :get to the method call.

Use schema.rb to create a new database

Keep the schema.rb file in your Subversion/Git/Mercurial repository and make sure it's up-to-date. It's very useful when you want to create a database without using migrations. You just call rake db:schema:load.

As the documentation states:

"Note that this schema.rb definition is the authoritative source for your database schema. If you need to create the application database on another system, you should be using db:schema:load, not running all the migrations from scratch. The latter is a flawed and unsustainable approach (the more migrations you'll amass, the slower it'll run and the greater likelihood for issues)."

Andrzej's Rails tips #8

Resource controller and 'new' action

If you want to refer to the 'new' action using resource controller, you have to use the 'new_action' method.
BTW, if you want to do the same operation before both 'new' and 'edit' actions in a resource controller, you can do it like that:

[new_action, edit].each do |action|
 action.before { @product_types = ProductType.find(:all) }
end

Migrations and removing defaults

If you have some default values set on some columns, then you can remove them using ':default => nil'.
Like that:

change_column :users, :name, :string, :default => nil