Ruby on Rails

hi , i am new to ROR

i was acually trying to write Ruby code for the api blogs

i have written the ruby code as

Loading development environment (Rails 2.3.8)
>> class Blogpost < ActiveRecord::Base
>> has_many :taggings
>> has_many :tags,:through => :taggings
>> end
=> nil
>> class Taggings < ActiveRecord::Base
>> belongs_to :blogpost
>> belongs_to :tag
>> end
=> nil

?> @tags=Tag.find_by_name("blog7")
=> #<Tag id: 4, name: "blog7">
>> @taggings=Tagging.find_by_id(@tags.id)
=> #<Tagging id: 4, tag_id: 1, taggable_id: 4, taggable_type:
"Blogpost", created_at: "2010-09-02 10:03:08">
>> @blogposts=Blogpost.find_by_id(@taggings.taggable_id)
=> #<Blogpost id: 4, title: "blog post4", type: nil, slug:
"blog-post4", description: "<p>BLOG desc 4</p>", meta: nil, user_id: 1,
category_id: 379344121, times_viewed: 2, comments_count: 0, published:
1, created_at: "2010-09-02 10:03:08", updated_at: "2010-09-03 05:11:46",
delta: false>

Whether this way of writing Ruby code is the correct procedure for API..

Please give suggestions ..
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