how (replace|create) an enum field on rails 2.0 migrations?

Question

I would like to create an enum field at sone migration I\'m doing, I tried searching in google but I can\'t find the way to do it in the migration

the only thing I f

Answer 1

Add the following:

module ActiveRecord
  module ConnectionAdapters #:nodoc:
    class TableDefinition
      def enum(*args)
        options = args.extract_options!
        column_names = args

        column_names.each { |name| column(name, 'enum', options) }
      end
    end
  end
end

to lib/enum/table_definition.rb and include it in your init.rb.

Answer 2

You can manually specify the type by using the t.column method instead. Rails will interpret this as a string column, and you can simply add a validator to the model like Pavel suggested:

class CreatePayments < ActiveRecord::Migration
  def self.up
    create_table :payments do |t|
      t.string :concept
      t.integer :user_id
      t.text :notes
      t.column :status, "ENUM('accepted', 'cancelled', 'pending')"

      t.timestamps
    end    
  end

  def self.down
    drop_table :payments
  end
end

class Payment < ActiveRecord::Base
  validates_inclusion_of :status, :in => %w(accepted cancelled pending)
end

Answer 3

Similarly, the enumerated_attribute gem manages enums at the object level.

enum_attr :status, %w(accepted cancelled ^pending)

Define a string in the migration

t.string :status 

Also provides some nice features like dynamic predicate methods.

http://github.com/jeffp/enumerated_attribute/tree/master

Answer 4

ok, just read the whole rails api and found what I neeed and I dont like :( Rails doesn't support emum as native type on migrations, here is the info, I need to search for a plugin or other method.

I will keep you posted.