我有这些非常相似的课程：
class DeliveryDocument < CommercialDocument
# Relations
belongs_to :biller, :class_name => 'Company'
belongs_to :customer, :class_name => 'Company'
belongs_to :customer_center, :class_name => 'Center'
has_many :delivery_document_lines, :dependent => :destroy
alias_attribute :lines, :delivery_document_lines
# Some configuration
accepts_nested_attributes_for :delivery_document_lines
acts_as_freezable :only_dependencies => true,
:has_many => [:delivery_document_lines],
:belongs_to => [:biller, :customer, :customer_center]
acts_as_clonable :has_many => [:delivery_document_lines]
validates_each :lines do |record, attr, value|
# ...
end
end
和：
class InvoiceDocument < CommercialDocument
self.
# Relations
belongs_to :biller, :class_name => 'Company'
belongs_to :customer, :class_name => 'Company'
belongs_to :customer_center, :class_name => 'Center'
has_many :invoice_document_lines, :dependent => :destroy
alias_attribute :lines, :invoice_document_lines
# Some configuration
accepts_nested_attributes_for :invoice_document_lines
acts_as_freezable :only_dependencies => true,
:has_many => [:invoice_document_lines],
:belongs_to => [:biller, :customer, :customer_center]
acts_as_clonable :has_many => [:invoice_document_lines]
# Validations
validates_each :lines do |record, attr, value|
# ...
end
end
我也有一些我没有粘贴的方法可以提取到父级。我只需要知道父类中的类名。当我这样做时：
class CommercialDocument < Document # document inherits from AR::Base
# ...
has_many :"#{self.to_s.underscore}_lines", :dependent => :destroy
# ...
accepts_nested_attributes_for :"#{self.to_s.underscore}_lines"
# ...
end
self.to_s它不起作用，因为CommercialDocument.
您将如何在父类中重构这种行为？我可以将东西放在一个模块中并导入它，但是整个文档层次结构几乎变得毫无用处。我已经有了文档的层次结构，所以如果可以的话，如果有办法，我想使用它。