を実行しようとすると、次のエラーが発生しました。rake db:migrate
rake db:migrate
-- selt()
-- selt()
rake aborted!
ActiveRecord::MigrationProxy#disable_ddl_transaction delegated to migration.disable_ddl_transaction, but migration is nil: #<struct ActiveRecord::MigrationProxy name="DoNothingYet", version=20130722001522, filename="/Users/tidydee/Sites/simple_cms/db/migrate/20130722001522_do_nothing_yet.rb", scope="">
/Users/tidydee/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.0/lib/active_record/migration.rb:712:in `rescue in disable_ddl_transaction'
/Users/tidydee/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.0/lib/active_record/migration.rb:708:in `disable_ddl_transaction'
/Users/tidydee/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.0/lib/active_record/migration.rb:1012:in `use_transaction?'
/Users/tidydee/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.0/lib/active_record/migration.rb:922:in `rescue in block in migrate'
/Users/tidydee/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.0/lib/active_record/migration.rb:919:in `block in migrate'
/Users/tidydee/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.0/lib/active_record/migration.rb:916:in `each'
/Users/tidydee/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.0/lib/active_record/migration.rb:916:in `migrate'
/Users/tidydee/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.0/lib/active_record/migration.rb:764:in `up'
/Users/tidydee/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.0/lib/active_record/migration.rb:742:in `migrate'
/Users/tidydee/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.0/lib/active_record/railties/databases.rake:42:in `block (2 levels) in <top (required)>'
/Users/tidydee/.rvm/gems/ruby-2.0.0-p247/bin/ruby_noexec_wrapper:14:in `eval'
/Users/tidydee/.rvm/gems/ruby-2.0.0-p247/bin/ruby_noexec_wrapper:14:in `<main>'
Tasks: TOP => db:migrate
(See full trace by running task with --trace)
これは私の DoNothingYet 移行ファイルです。
class DoNothingYet < ActiveRecord::Migration
def change
end
def self.up
# instructions for changing the db to a new state
end
def selt.down
#intructiosn for changing the db back to the previous state
end
end
構文エラー：
rake db:migrate
rake aborted!
/Users/tidydee/Sites/simple_cms/db/migrate/20130722001921_create_users.rb:4: syntax error, unexpected ':', expecting keyword_end
t.string "first_name" :limit => 25
^
/Users/tidydee/Sites/simple_cms/db/migrate/20130722001921_create_users.rb:5: syntax error, unexpected ':', expecting keyword_end
t.string "last_name" :limit => 50
^
/Users/tidydee/Sites/simple_cms/db/migrate/20130722001921_create_users.rb:6: syntax error, unexpected ':', expecting keyword_end
t.string "email" :default => "", :null => false
^
/Users/tidydee/Sites/simple_cms/db/migrate/20130722001921_create_users.rb:7: syntax error, unexpected ':', expecting keyword_end
t.string "password" :limit => 40
^
/Users/tidydee/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `require'
/Users/tidydee/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `block in require'
/Users/tidydee/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:213:in `load_dependency'
/Users/tidydee/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `require'
/Users/tidydee/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.0/lib/active_record/migration.rb:718:in `load_migration'
/Users/tidydee/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.0/lib/active_record/migration.rb:714:in `migration'
/Users/tidydee/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.0/lib/active_record/migration.rb:708:in `disable_ddl_transaction'
/Users/tidydee/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.0/lib/active_record/migration.rb:1012:in `use_transaction?'
/Users/tidydee/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.0/lib/active_record/migration.rb:1004:in `ddl_transaction'
/Users/tidydee/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.0/lib/active_record/migration.rb:958:in `execute_migration_in_transaction'
/Users/tidydee/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.0/lib/active_record/migration.rb:920:in `block in migrate'
/Users/tidydee/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.0/lib/active_record/migration.rb:916:in `each'
/Users/tidydee/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.0/lib/active_record/migration.rb:916:in `migrate'
/Users/tidydee/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.0/lib/active_record/migration.rb:764:in `up'
/Users/tidydee/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.0/lib/active_record/migration.rb:742:in `migrate'
/Users/tidydee/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.0/lib/active_record/railties/databases.rake:42:in `block (2 levels) in <top (required)>'
ユーザーの移行ファイル:
class CreateUsers < ActiveRecord::Migration
def self.up
create_table :users do |t|
t.string "first_name" :limit => 25
t.string "last_name" :limit => 50
t.string "email" :default => "", :null => false
t.string "password" :limit => 40
t.timestamps
end
end
def self.down
drop_table:us
end
end
誰かが理由を知っていますか？そして、これを適切に移行するにはどうすればよいですか