persisted?() Instance Public methods Indicates if the model is persisted.

validates_inclusion_of(*attr_names) Instance Public methods Validates whether

changed_attributes() Instance Public methods Returns a hash of the attributes

define_attribute_method(attr_name) Instance Public methods Declares an attribute

validates_numericality_of(*attr_names) Instance Public methods Validates whether

as_json(options=nil) Instance Public methods Returns a

set(key, value) Instance Public methods Set messages for key to

attribute_method_prefix(*prefixes) Instance Public methods Declares a method

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

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