Module: PreferenceFu::ClassMethods

Defined in:
lib/preference_fu.rb

Instance Method Summary collapse

Instance Method Details

#has_preferences(*prefs) ⇒ Object 



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# File 'lib/preference_fu.rb', line 10

def has_preferences(*prefs)
  alias_method_chain :initialize, :preferences
  
  class_eval do
    class << self
      alias_method_chain :instantiate, :preferences
      attr_accessor :preference_options
    end
  end
  
  options = prefs.extract_options!
  preference_names=prefs-options.keys
  @config = { :column => 'preferences' }.merge(options)
  
  self.preference_options = {}
  prefs.each_with_index do |pref, idx|
    self.preference_options[2**idx] = { :key => pref.to_sym, :default => false }
  end
  
  preference_names.each do |pref|        
    define_method(pref.to_sym) {self.prefs[pref.to_sym]}
    define_method((pref.to_s+'?').to_sym) {send pref.to_sym}
    define_method((pref.to_s+'=').to_sym) {|a| self.prefs[pref.to_sym]=a}
  end
  
  class << self
    define_method(:preferences_column) { @config[:column] }
  end
        
end

#instantiate_with_preferences(*args) ⇒ Object 



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# File 'lib/preference_fu.rb', line 49

def instantiate_with_preferences(*args)
  record = instantiate_without_preferences(*args)
  record.prefs
  record
end

#set_default_preference(key, default) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/preference_fu.rb', line 41

def set_default_preference(key, default)
  raise ArgumentError.new("Default value must be boolean") unless [true, false].include?(default)
  idx = preference_options.find { |idx, hsh| hsh[:key] == key.to_sym }.first rescue nil
  if idx
    preference_options[idx][:default] = default
  end
end