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Contents
module ClassyEnum
module ClassMethods
# Build a new ClassyEnum child instance
#
# ==== Example
# # Create an Enum with some elements
# class Priority < ClassyEnum::Base
# enum_classes :low, :medium, :high
# end
#
# Priority.build(:low) # => PriorityLow.new
def build(option)
return option if option.blank?
return TypeError.new("Valid #{self} options are #{self.valid_options}") unless self::OPTIONS.include? option.to_sym
Object.const_get("#{self}#{option.to_s.camelize}").new
end
alias :find :build
# Returns an array of all instantiated enums
#
# ==== Example
# # Create an Enum with some elements
# class Priority < ClassyEnum::Base
# enum_classes :low, :medium, :high
# end
#
# Priority.all # => [PriorityLow.new, PriorityMedium.new, PriorityHigh.new]
def all
self::OPTIONS.map {|e| build(e) }
end
# Returns a 2D array for Rails select helper options.
# Also used internally for Formtastic support
#
# ==== Example
# # Create an Enum with some elements
# class Priority < ClassyEnum::Base
# enum_classes :low, :really_high
# end
#
# Priority.select_options # => [["Low", "low"], ["Really High", "really_high"]]
def select_options
all.map {|e| [e.name, e.to_s] }
end
# Returns a comma separated list of valid enum options.
# Also used internally for ActiveRecord model validation error messages
#
# ==== Example
# # Create an Enum with some elements
# class Priority < ClassyEnum::Base
# enum_classes :low, :medium, :high
# end
#
# Priority.valid_options # => "low, medium, high"
def valid_options
self::OPTIONS.map(&:to_s).join(', ')
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems