Module: StringEnum::ClassMethods

Defined in:
lib/string_enum.rb

Instance Method Summary collapse

Instance Method Details

#string_enum(field, values, options = {}) ⇒ Object

Example using string_enum

class User < ActiveRecord::Base
  string_enum :status, %w(active deleted)
  string_enum :status, %w(active deleted), prefix: :foo, suffix: :bar, scopes: :plural
end

user = User.new
user.active?
user.deleted?



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# File 'lib/string_enum.rb', line 18

def string_enum(field, values, options = {})
  validates field, inclusion: { in: values }

  values.each do |value|
    value = value.to_s if value.is_a? Symbol
    prefix = options[:prefix] == true ? field : options[:prefix]
    postfix = options[:postfix] == true ? field : options[:postfix]
    name = [prefix, value, postfix].compact.join('_')

    scope_name = options[:scopes] == :plural ? name.pluralize : name
    scope scope_name, -> { where(field => value) }
    scope "not_#{scope_name}", -> { where.not(field => value) }

    define_method "#{name}?" do
      send(field) == value
    end
    define_method "#{field}=" do |new_value|
      super(new_value.is_a?(Symbol) ? new_value.to_s : new_value)
    end
  end
end