new(params={}) Class Public methods Initializes a new model with the given params

=~(regexp) Instance Public methods Equivalent to String#=~. Match

to_hash(full_messages = false) Instance Public methods Returns a

validates_presence_of(*attr_names) Instance Public methods Validates that the

changes() Instance Public methods Returns a hash of changed attributes indicating

previous_changes() Instance Public methods Returns a hash of attributes that

clear() Instance Public methods Clear the error messages.

changed() Instance Public methods Returns an array with the name of the attributes

valid?(context = nil) Instance Public methods Runs all the specified validations

validates_numericality_of(*attr_names) Instance Public methods Validates whether