DHH will probably hate my example, but...
AWDR talks about the difficulties and dangers of using complex
migrations--complex being defined as "doing more than one thing". Not
being satisfied with the alternatives, I have come up with a system,
which people might want to consider for best practice. Example:
class CreateUsers < ActiveRecord::Migration
def self.up
create_table :users do |t|
t.column :username, :string, :null => false
t.column :salt, :string
t.column :pw, :string, :null => false
t.column :expires, :datetime, :null => false
t.column :perm0, :int, :default => 0, :null => false
end
begin
add_index(:users, :username, :unique => true)
User.send(:reset_root, 'Hownowbrowncow')
rescue Exception => e
down rescue STDERR.puts "Nested exception executing
CreateUsers.down:\n#{$!}"
raise e
end
end
def self.down
drop_table :users
end
end
