Module: CompositePrimaryKeys::ActiveRecord::Base::CompositeInstanceMethods

Defined in:
lib/composite_primary_keys/base.rb

Instance Method Summary collapse

Instance Method Details

#clone ⇒ Object

Returns a clone of the record that hasn’t been assigned an id yet and is treated as a new record. Note that this is a “shallow” clone: it copies the object’s attributes only, not its associations. The extent of a “deep” clone is application-specific and is therefore left to the application to implement according to its need.



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# File 'lib/composite_primary_keys/base.rb', line 85

def clone
  attrs = self.attributes_before_type_cast
  self.class.primary_keys.each {|key| attrs.delete(key.to_s)}
  self.class.new do |record|
    record.send :instance_variable_set, '@attributes', attrs
  end
end

#id ⇒ Object Also known as: ids

A model instance’s primary keys is always available as model.ids whether you name it the default ‘id’ or set it to something else.



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# File 'lib/composite_primary_keys/base.rb', line 48

def id
  attr_names = self.class.primary_keys
  CompositeIds.new(attr_names.map { |attr_name| read_attribute(attr_name) })
end

#id=(ids) ⇒ Object

Sets the primary ID.



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# File 'lib/composite_primary_keys/base.rb', line 70

def id=(ids)
  ids = ids.split(ID_SEP) if ids.is_a?(String)
  ids.flatten!
  unless ids.is_a?(Array) and ids.length == self.class.primary_keys.length
    raise "#{self.class}.id= requires #{self.class.primary_keys.length} ids"
  end
  [primary_keys, ids].transpose.each {|key, an_id| write_attribute(key , an_id)}
  id
end

#id_before_type_cast ⇒ Object

:nodoc:

Raises:



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# File 'lib/composite_primary_keys/base.rb', line 58

def id_before_type_cast #:nodoc:
  raise CompositeKeyError, CompositePrimaryKeys::ActiveRecord::Base::NOT_IMPLEMENTED_YET
end

#quoted_id ⇒ Object

:nodoc:



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# File 'lib/composite_primary_keys/base.rb', line 62

def quoted_id #:nodoc:
  [self.class.primary_keys, ids].
    transpose.
    map {|attr_name,id| quote_value(id, column_for_attribute(attr_name))}.
    to_composite_ids
end

#to_param ⇒ Object 



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# File 'lib/composite_primary_keys/base.rb', line 54

def to_param
  id.to_s
end