ANN: Sequel 0.4.5 Released

Sequel version 0.4.5 has just been released. Sequel is a lightweight
database access and ORM library for Ruby. Sequel provides thread
safety, connection pooling and a simple and expressive API for
constructing database queries and table schemas.

This release includes new model validations and a few minor bug fixes
and improvements. Here are the changes:

=== New model validations

Sequel now includes support for validations in models. The validations
functionality is based on the Validatable gem (http://, which needs to be installed if validations
are to be used. Validations can be defined in two forms. First there
is the validates method, which takes a block:

  class User < Sequel::Model(:users)
    validates do
      format_of :email, :with => /somewhackyregexp/
      presence_of :name

You can also invoke all the validate_xxx methods supported by
validatable directly:

  class User < Sequel::Model(:users)
    validates_format_of :email, :with => /somewhackyregexp/
    validates_presence_of :name

To check if an instance is valid you can call the #valid? method:


To check if a model class has defined validations you can invoke


=== Other changes

* Fixed update_sql with array sub-item keys (#110).
* Added Model#update as alias to #set.
* Added Database#set_column_default method (thanks Jim Morris.)
* Added rdoc for new alter_table functionality (#109).
* Refactored model specs.
* Removed warning on uninitialized @transform value (thanks Jim

=== More info

Sequel project page:

Sequel documentation:

Join the Sequel-talk group:

Install the gem:
  sudo gem install sequel

Or check out the source and install manually:
  svn co sequel
  cd sequel
  rake install