dm-mapping (1)

from Lin Jen-Shin
to DataMapper
cc godfat 真常
date Mon, Jul 28, 2008 at 12:30 AM
subject Re: Manipulate an existing database.
mailed-by gmail.com

On Jul 27, 6:33 pm, "Michael Klishin" wrote:

I was not familiar with SQL, and I found that it was database dependent.
Anyway, I have just created a project *dm-mapping* for testing the thought.

http://github.com/godfat/dm-mapping

Though currently only sqlite3 is supported,
feel free to fork it or use it somewhere.
(sql codes were borrowed from activerecord 2.1)

Here's the updated thought of usage:

== SYNOPSIS:

 require 'dm-core'

 # setup first, or dm-mapping can't determine which adapter it should load up
 DataMapper.setup :default, 'sqlite3://db/development.sqlite3'

 require 'dm-mapping'

 class User
  include DataMapper::Resource
  mapping /.*/
  mapping DataMapper::Mapping::All
  mapping /_at$/, /^salt_/
  mapping :account, :email
  mapping *storage_fields
 end

 DataMapper.repository.storages
 # => ['users']

 User.storage_fields
 # => ['account', 'email', 'created_at', 'salt_first', 'salt_second']

 DataMapper.repository.fields('users')
 # => ['account', 'email', 'created_at', 'salt_first', 'salt_second']

 DataMapper.repository.storages_and_fields
 # => {'users' => ['account', 'email', 'created_at', 'salt_first', 'salt_second']}


Thanks for your listening,