Module: PGCrypto::ClassMethods

Defined in:
lib/pgcrypto.rb

Instance Method Summary collapse

Instance Method Details

#pgcrpyto_columns ⇒ Object 



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# File 'lib/pgcrypto.rb', line 80

def pgcrpyto_columns
  PGCrypto[table_name]
end

#pgcrypto(*pgcrypto_column_names) ⇒ Object 



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# File 'lib/pgcrypto.rb', line 22

def pgcrypto(*pgcrypto_column_names)
  options = pgcrypto_column_names.last.is_a?(Hash) ? pgcrypto_column_names.pop : {}
  options = {:include => false, :type => :pgp}.merge(options)

  has_many :pgcrypto_columns, :as => :owner, :autosave => true, :class_name => 'PGCrypto::Column', :dependent => :delete_all

  hooks do
    before(:reload) do
      self.class.pgcrpyto_columns.each do |column_name, options|
        reset_attribute! column_name
        changed_attributes.delete(column_name)
      end
    end
  end

  pgcrypto_column_names.map(&:to_s).each do |column_name|
    # Stash the encryption type in our module so various monkeypatches can access it later!
    PGCrypto[table_name][column_name] = options.symbolize_keys

    # Add dynamic attribute readers/writers for ActiveModel APIs
    # define_attribute_method column_name

    # Add attribute readers/writers to keep this baby as fluid and clean as possible.
    start_line = __LINE__; pgcrypto_methods = "    def \#{column_name}\n      return @_pgcrypto_\#{column_name}.try(:value) if defined?(@_pgcrypto_\#{column_name})\n      @_pgcrypto_\#{column_name} ||= select_pgcrypto_column(:\#{column_name})\n      @_pgcrypto_\#{column_name}.try(:value)\n    end\n\n    # We write the attribute directly to its child value. Neato!\n    def \#{column_name}=(value)\n      attribute_will_change!(:\#{column_name}) if value != @_pgcrypto_\#{column_name}.try(:value)\n      if value.nil?\n        pgcrypto_columns.select{|column| column.name == \"\#{column_name}\"}.each(&:mark_for_destruction)\n        remove_instance_variable(\"@_pgcrypto_\#{column_name}\") if defined?(@_pgcrypto_\#{column_name})\n      else\n        @_pgcrypto_\#{column_name} ||= pgcrypto_columns.select{|column| column.name == \"\#{column_name}\"}.first || pgcrypto_columns.new(:name => \"\#{column_name}\")\n        pgcrypto_columns.push(@_pgcrypto_\#{column_name})\n        @_pgcrypto_\#{column_name}.value = value\n      end\n    end\n\n    def \#{column_name}_changed?\n      changed.include?(:\#{column_name})\n    end\n    PGCRYPTO_METHODS\n\n    class_eval pgcrypto_methods, __FILE__, start_line\n  end\n\n  # If any columns are set to be included in the parent record's finder,\n  # we'll go ahead and add 'em!\n  if PGCrypto[table_name].any?{|column, options| options[:include] }\n    default_scope includes(:pgcrypto_columns)\n  end\nend\n"