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class Company < ActiveRecord::Base
attr_protected :rating
validates_presence_of :name
end
class Firm < Company
has_many :clients, :order => "id", :dependent => true
has_many :clients_sorted_desc, :class_name => "Client", :order => "id DESC"
has_many :clients_of_firm, :foreign_key => "client_of", :class_name => "Client", :order => "id"
has_many :clients_like_ms, :conditions => "name = 'Microsoft'", :class_name => "Client", :order => "id"
has_many :clients_using_sql, :class_name => "Client", :finder_sql => 'SELECT * FROM companies WHERE client_of = #{id}'
has_many :clients_using_counter_sql, :class_name => "Client",
:finder_sql => 'SELECT * FROM companies WHERE client_of = #{id}',
:counter_sql => 'SELECT COUNT(*) FROM companies WHERE client_of = #{id}'
has_many :clients_using_zero_counter_sql, :class_name => "Client",
:finder_sql => 'SELECT * FROM companies WHERE client_of = #{id}',
:counter_sql => 'SELECT 0 FROM companies WHERE client_of = #{id}'
has_one :account, :dependent => true
end
class Client < Company
belongs_to :firm, :foreign_key => "client_of"
belongs_to :firm_with_basic_id, :class_name => "Firm", :foreign_key => "firm_id"
belongs_to :firm_with_other_name, :class_name => "Firm", :foreign_key => "client_of"
belongs_to :firm_with_condition, :class_name => "Firm", :foreign_key => "client_of", :conditions => "1 = 1"
end
class SpecialClient < Client
end
class VerySpecialClient < SpecialClient
end
class Account < ActiveRecord::Base
belongs_to :firm
protected
def validate
errors.add_on_empty "credit_limit"
end
end
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