Module: EnumAttribute::ClassMethods

Defined in:
lib/enum_attribute.rb

Instance Method Summary collapse

Instance Method Details

#enum_attribute(name, values, opts = {:number=>false,:colum_name=>false,:i18n=>true}) ⇒ Object 



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

def enum_attribute name, values, opts={:number=>false,:colum_name=>false,:i18n=>true}
  raise "Values should be given as Enumerable" unless values.is_a?(Enumerable)
  values = values.map(&:to_s)
  #validates_inclusion_of __send__(name), :in=>values unless opts[:skip_validation]

  pluralized = name.to_s.pluralize

  extend Module.new{
    define_method pluralized do
      values
    end
    define_method "#{name}_names" do
      if opts[:i18n] == false
        values
      else
        values.map{|n|self.i18nt(n,pluralized)}
      end
    end
    define_method "#{name}_pairs" do
      if opts[:number]
        values.each_with_index.map{|n,i|[ self.i18nt(n,pluralized), i + 1]}
      else
        values.map{|n|[ self.i18nt(n,pluralized), n]}
      end
    end
    define_method "#{name}_name" do |col|
      return "" if col.blank?
      if col.to_i==0 #0 and char -> true
        return "" unless values.any?{|v| v == col.to_s}
        self.i18nt(col,pluralized)
      else
        return "" if values.size < col.to_i
        self.i18nt(values[col - 1],pluralized)
      end
    end
    def i18nt(value,pluralized) 
      return "" unless value
      #I18n.t("models.#{self.model_name.to_s.underscore}.#{pluralized}.#{value}")
      i18n_scope = "activerecord"
      i18n_scope = self.i18n_scope.to_s if defined?(self.i18n_scope) #rails2 support i18n_scope
      I18n.t("#{i18n_scope}.attributes.#{self.model_name.to_s.underscore}.#{pluralized}.#{value}")
    end
  }

  # foo.val_seed
  define_method "#{name}_seed" do
    column_name = name
    column_name = opts[:column_name] if opts[:column_name]
    if opts[:number]
      return "" if __send__(column_name).to_i - 1 < 0
      values[__send__(column_name).to_i - 1]
    else
      column_name
    end
  end

  # if locale is just variable,it'll cause to error
  # So array(*locale) can make parameter nothing.
  # ex. foo.val_name
  define_method "#{name}_name" do |*locale|
    column_name = name
    column_name = opts[:column_name] if opts[:column_name]

    return "" unless __send__(column_name) #reject nil in column

    if opts[:number]
      return "" if __send__(column_name).to_i - 1 < 0
      value = values[__send__(column_name).to_i - 1]
    else
      value = __send__(column_name) 
    end

    return value if opts[:i18n] == false

    l = :en
    l = I18n.locale if defined?(I18n.locale)
    l = locale[0] if locale

    i18n_scope = "activerecord"
    i18n_scope = self.i18n_scope.to_s if defined?(self.i18n_scope) #rails2 support i18n_scope
    I18n.t("#{i18n_scope}.attributes.#{self.model_name.to_s.underscore}.#{pluralized}.#{value}",:locale=>l)
  end

  # I want to use for checkbox type ,but indeed its hard to manage to store&read with Mysql
  # so,it'll be dupricated in near future.
  #
  # foo.val_names
  #
  # :assumption data is array
  #  ex @aaa.test_names => ['a','b','c']
  #
  #define_method "#{name}_names" do
    #array =[]
    #return false if self.send(name).blank?
    #if self.class.to_s.index("::")
      #self.send(name).map{|n|array << I18n.t("models.#{self.class.superclass.to_s.underscore}.#{pluralized}.#{n}")}
    #else
      #self.send(name).map{|n|array << I18n.t("models.#{self.class.to_s.underscore}.#{pluralized}.#{n}")}
    #end
    #return array.join("<br />")
  #end

end