- validates_length_of :language, :within => 2..3
- validates_numericality_of :latitude, :allow_nil => true
- validates_numericality_of :longitude, :allow_nil => true
+ validates_length_of :language, :within => 2..3, :allow_nil => true
+ validates_numericality_of :latitude, :allow_nil => true,
+ :greater_than_or_equal_to => -90, :less_than_or_equal_to => 90
+ validates_numericality_of :longitude, :allow_nil => true,
+ :greater_than_or_equal_to => -180, :less_than_or_equal_to => 180