hi,all…
Here i want to use of migration to create a table and set a defult
value for a column…but i cant’t finished…
mycode:
class CreateMessages < ActiveRecord::Migration
def self.up
create_table :messages do |t|
t.column :name, :string
t.column :content, :text
t.column :posttime, :datetime, :default => “now()”
end
end
def self.down
drop_table :messages
end
end
it can’t work sucessfully.And the error like this:
(in G:/Jc_RubyonRails/InstantRails/rails_apps/guestbook)
== CreateMessages: migrating
– create_table(:messages)
rake aborted!
Mysql::Error: Invalid default value for ‘posttime’: CREATE TABLE
messages (id
int(11) DEFAULT NULL auto_increment PRIMARY KEY, name
varchar(255) DEFAULT NULL, content
text DEFAULT NULL, posttime
datetime DEFAULT ‘now()’) ENGINE=InnoDB
(See full trace by running task with --trace)
someone could help me.thanks.