1.0 - Pheasant Rising
- Object Mapping: Save, Remove
- Object Relationships: HasMany, HasOne and BelongsTo
- Events: Save, Create, Update, Remove
- Sequences and AutoIncrement Identifiers
- Magic Finder Methods
- Basic Query Builder
- Mysqli driver
- Custom Types
1.2.0
- Object caching for HasOne relationships
- Eager loading with() (N+1 problem)
2.0
- PHP 5.5 only
- Object traits
- Save graph for cascading save
- Object Relationships: N:M support
- Static Relationships (return a fixed collection of objects)
- Cascading Delete
- Pluggable backends for object caching