ri > ActiveRecord::UnknownPrimaryKey

= ActiveRecord::UnknownPrimaryKey < ActiveRecord::ActiveRecordError

(from /home/chedong/.local/share/rdoc)
------------------------------------------------------------------------
Raised when a primary key is needed, but not specified in the schema or
model.
------------------------------------------------------------------------
= Class methods:

  new

= Instance methods:

  model

= Attributes:

  attr_reader model