class ChangeChatMessagesColumnsAndAddIndexes < ActiveRecord::Migration
def up
change_table :chat_messages do |t|
t.change :from_id, :integer, :null => false
t.change :to_id, :integer, :null => false
t.change :body, :text
end
add_index :chat_messages, :from_id
add_index :chat_messages, :to_id
add_index :chat_messages, :created_at
end
def down
remove_index :chat_messages, :from_id
remove_index :chat_messages, :to_id
remove_index :chat_messages, :created_at
change_table :chat_messages do |t|
t.change :from_id, :integer, :null => true
t.change :to_id, :integer, :null => true
t.change :body, :string
end
end
end