Module: ClassyEnum::InstanceMethods

Defined in:
lib/classy_enum/instance_methods.rb

Instance Method Summary collapse

Instance Method Details

#<=>(other) ⇒ Object

Sort an array of elements based on the order they are defined

Example

# Create an Enum with some elements
class Priority < ClassyEnum::Base
  enum_classes :low, :medium, :high
end

@low = Priority.build(:low)
@medium = Priority.build(:medium)
@high = Priority.build(:high)
priorities = [@low, @high, @medium]
priorities.sort # => [@low, @medium, @high]
priorities.max # => @high
priorities.min # => @low



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# File 'lib/classy_enum/instance_methods.rb', line 78

def <=> other
  @index <=> other.index
end

#index ⇒ Object Also known as: to_i

Returns an integer representing the order that this element was defined in. Also used internally for sorting.

Example

# Create an Enum with some elements
class Priority < ClassyEnum::Base
  enum_classes :low, :medium, :high
end

@priority = PriorityMedium.new
@priority.index # => 2



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# File 'lib/classy_enum/instance_methods.rb', line 14

def index
  @index
end

#is?(obj) ⇒ Boolean

Determine if the enum attribute is a particular member. Accepts a symbol or string representing a member

Example

# Create an Enum with some elements
class Breed < ClassyEnum::Base
  enum_classes :golden_retriever, :snoop
end

# Create an ActiveRecord class using the Breed enum
class Dog < ActiveRecord::Base
  classy_enum_attr :breed
end

@dog = Dog.new(:breed => :snoop)
@dog.breed.is? :snoop # => true
@dog.breed.is? 'snoop' # => true
@dog.breed.is? :golden_retriever # => false

Returns:

  • (Boolean) 


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# File 'lib/classy_enum/instance_methods.rb', line 100

def is?(obj)
  obj.to_s == to_s
end

#name ⇒ Object

Returns string representing enum in Rails titleize format

Example

# Create an Enum with some elements
class Priority < ClassyEnum::Base
  enum_classes :low, :medium, :high, :really_high
end

@priority = Priority.build(:really_high)
@priority.name # => "Really High"



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# File 'lib/classy_enum/instance_methods.rb', line 59

def name
  @to_s.titleize
end

#to_s ⇒ Object

Returns the name or string corresponding to element

Example

# Create an Enum with some elements
class Priority < ClassyEnum::Base
  enum_classes :low, :medium, :high
end

@priority = PriorityLow.new
@priority.to_s # => 'low'



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# File 'lib/classy_enum/instance_methods.rb', line 30

def to_s
  @to_s
end

#to_sym ⇒ Object

Returns a Symbol corresponding to a string representation of element, creating the symbol if it did not previously exist

Example

# Create an Enum with some elements
class Priority < ClassyEnum::Base
  enum_classes :low, :medium, :high
end

@priority = PriorityLow.new
@priority.to_sym # => :low



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# File 'lib/classy_enum/instance_methods.rb', line 45

def to_sym
  @to_s.to_sym
end