method

becomes

v3.2.1 - Show latest stable - 0 notes - Class: ActiveRecord::Persistence

becomes(klass) public

Returns an instance of the specified klass with the attributes of the current record. This is mostly useful in relation to single-table inheritance structures where you want a subclass to appear as the superclass. This can be used along with record identification in Action Pack to allow, say, Client < Company to do something like render :partial => @client.becomes(Company) to render that instance using the companies/company partial instead of clients/client.

Note: The new instance will share a link to the same attributes as the original class. So any change to the attributes in either instance will affect the other.

Show source

# File activerecord/lib/active_record/persistence.rb, line 158
    def becomes(klass)
      became = klass.new
      became.instance_variable_set("@attributes", @attributes)
      became.instance_variable_set("@attributes_cache", @attributes_cache)
      became.instance_variable_set("@new_record", new_record?)
      became.instance_variable_set("@destroyed", destroyed?)
      became.instance_variable_set("@errors", errors)
      became.type = klass.name unless self.class.descends_from_active_record?
      became
    end

becomes

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