Improve the implementation of the :in operator
Optimizing queries for indexed between (explicit and hidden)
Improve disable_timestamps logic
Extracted callbacks and added the :initialize callbacks
Dirty tracking operates on hashes and arrays
field and belongs_to accept the :validates option
instance.attributes is a with_indifferent_access hash
criteria includes() -> preload()
Provide a field_name? method for Booleans
Version Bump