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class Setting < ActiveRecord::Base
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attr_accessible :name, :value, :description, :category, :settings_type, :default
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# audit the changes to this model
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audited :only => [:value], :on => [:update]
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TYPES= %w{ integer boolean hash array }
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FROZEN_ATTRS = %w{ name default description category settings_type }
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validates_presence_of :name, :description
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validates_presence_of :default, :unless => Proc.new { |s| !s.default } # broken validator
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validates_uniqueness_of :name
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validates_numericality_of :value, :if => Proc.new {|s| s.settings_type == "integer"}
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validates_numericality_of :value, :if => Proc.new {|s| s.name == "puppet_interval"}, :greater_than => 0
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validates_inclusion_of :value, :in => [true,false], :if => Proc.new {|s| s.settings_type == "boolean"}
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validates_inclusion_of :settings_type, :in => TYPES, :allow_nil => true, :allow_blank => true
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before_validation :fix_types
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before_save :save_as_settings_type
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validate :validate_attributes
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default_scope :order => 'LOWER(settings.name)'
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scoped_search :on => :name, :complete_value => :true
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scoped_search :on => :category, :complete_value => :true
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scoped_search :on => :description, :complete_value => :true
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def self.per_page; 20 end # can't use our own settings
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def self.[](name)
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name = name.to_s
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cache.fetch name do
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where(:name => name).first.try(:value)
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end
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end
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def self.[]=(name, value)
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name = name.to_s
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record = find_or_create_by_name name
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record.value = value
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cache.delete(name)
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record.save!
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end
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def self.method_missing(method, *args)
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super(method, *args)
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rescue NoMethodError
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method_name = method.to_s
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#setter method
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if method_name =~ /=$/
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self[method_name.chomp("=")] = args.first
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#getter
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else
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self[method_name]
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end
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end
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def value= val
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v = (val.nil? or val == default) ? nil : val.to_yaml
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self.class.cache.delete(name.to_s)
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write_attribute :value, v
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end
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def value
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v = read_attribute(:value)
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v.nil? ? default : YAML.load(v)
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end
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alias_method :value_before_type_cast, :value
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def default
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YAML.load(read_attribute(:default))
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end
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def default=(v)
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write_attribute :default, v.to_yaml
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end
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alias_method :default_before_type_cast, :default
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private
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def self.cache
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Rails.cache
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end
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def save_as_settings_type
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return true unless settings_type.nil?
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t = default.class.to_s.downcase
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if TYPES.include?(t)
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self.settings_type = t
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else
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self.settings_type = "integer" if default.is_a?(Integer)
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self.settings_type = "boolean" if default.is_a?(TrueClass) or default.is_a?(FalseClass)
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end
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end
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def fix_types
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case settings_type
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when "boolean"
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self.value = true if value == "true"
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self.value = false if value == "false"
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when "integer"
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self.value = value.to_i if value =~ /\d+/
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when "array"
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if value =~ /^\s*\[.*\]\s*$/
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begin
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self.value = YAML.load(value.gsub(/(\,)(\S)/, "\\1 \\2"))
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rescue => e
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errors.add(:value, "invalid value: #{e}")
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return false
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end
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else
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errors.add(:value, "Must be an array")
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return false
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end
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end
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true
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end
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def validate_attributes
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return true if new_record?
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changed_attributes.keys.each do |c|
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if FROZEN_ATTRS.include?(c.to_s)
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errors.add(c, "is not allowed to change")
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return false
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end
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end
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true
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end
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end
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