Module: ActiveLDAP::Associations::ClassMethods

Defined in:
lib/activeldap/associations.rb

Instance Method Summary collapse

Instance Method Details

#belongs_to(association_id, options = {}) ⇒ Object

belongs_to

This defines a method for an extension class map its DN key attribute value on to multiple items which reference it by |:foreign_key| in the other LDAP entry covered by class |:class_name|.

Example:

belongs_to :groups, :class_name => Group, :foreign_key => memberUid, :local_key => 'uid'



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# File 'lib/activeldap/associations.rb', line 105

def belongs_to(association_id, options = {})
  klass = options[:class_name] || association_id.to_s
  key = options[:foreign_key]  || association_id.to_s + "_id"
  local_key = options[:local_key] || ''
  class_eval <<-"end_eval"
    def #{association_id}(objects = true)
      local_key = "#{local_key}"
      local_key = dnattr() if local_key.empty?
      results = []
      #{klass}.find_all(:attribute => "#{key}", :value => send(local_key.to_sym), :objects => objects).each do |o|
        results << o
      end
      return results
    end
  end_eval
end

#has_many(association_id, options = {}) ⇒ Object

has_many

This defines a method for an extension class expand an existing multi-element attribute into ActiveLDAP objects. This discards any calls which result in entries that don’t exist in LDAP!

Example:

has_many :members, :class_name => User, :local_key => memberUid, :foreign_key => 'uid'

TODO: def #…=(val) to redefine group membership



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# File 'lib/activeldap/associations.rb', line 134

def has_many(association_id, options = {})
  klass = options[:class_name] || association_id.to_s
  key = options[:local_key]  || association_id.to_s + "_id"
  foreign_key = options[:foreign_key] || ''
  class_eval <<-"end_eval"
    def #{association_id}(objects = true)
      foreign_key = "#{foreign_key}"
      if foreign_key.empty?
        foreign_key = dnattr()
      end
      results = []
      unless @data["#{key}"].nil?
        @data["#{key}"].each do |item|
          fkey = ""
          if foreign_key == "dn" and not item.empty?
            fkey = item.split(',')[0].split('=')[0]
            item = item.split(',')[0].split('=')[1]
          end
          # This will even yield entries that don't necessarily exist
          if foreign_key != "dn"
            fkey = foreign_key
          end
          #{klass}.find_all(:attribute => fkey, :value => item, :objects => objects).each do |match|
            results << match
          end
        end
      end
      return results
    end
  end_eval
end

#ldap_mapping(options = {}) ⇒ Object

This class function is used to setup all mappings between the subclass and ldap for use in activeldap

Example:

ldap_mapping :dnattr => 'uid', :prefix => 'ou=People', 
             :classes => ['top', 'posixAccount'], scope => LDAP::LDAP_SCOPE_SUBTREE,
             :parent => String



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# File 'lib/activeldap/associations.rb', line 22

def ldap_mapping(options = {})
  # The immediate ancestor should be the caller....
  klass = self.ancestors[0]

  dnattr = options[:dnattr] || 'cn'
  prefix = options[:prefix] || "ou=#{klass.to_s.split(':').last}"
  classes_array = options[:classes] || nil
  scope = options[:scope] || 'super'
  # When used, instantiates parent objects from the "parent dn". This
  # can be a String or a real ActiveLDAP class. This just adds the helper 
  # Base#parent.
  parent = options[:parent_class] || nil

  classes = 'super'
  unless classes_array.nil?
    raise TypeError, ":classes must be an array" \
      unless classes_array.respond_to? :size
    # Build classes array
    classes = '['
    classes_array.map! {|x| x = "'#{x}'"}
    classes << classes_array.join(', ')
    classes << ']'
  end

  # This adds the methods to the local
  # class which can then be inherited, etc
  # which describe the mapping to LDAP.
  klass.class_eval(<<-"end_eval")
    class << self
      # Return the list of required object classes
      def required_classes
        #{classes}
      end

      # Return the full base of the class
      def base
        if "#{prefix}".empty?
          return "\#{super}"
        else
          return "#{prefix},\#{super}"
        end
      end

      # Return the expected DN attribute of an object
      def dnattr
        '#{dnattr}'
      end

      # Return the expected DN attribute of an object
      def ldap_scope
        #{scope}
      end
    end
    
    # Hide connect
    private_class_method :connect

    # Unhide class methods
    public_class_method :find_all
    public_class_method :find
    public_class_method :new
    public_class_method :dnattr
 end_eval

 # Add the parent helper if desired
 if parent
   klass.class_eval(<<-"end_eval")
     def parent()
       return #{parent}.new(@dn.split(',')[1..-1].join(','))
     end
   end_eval
 end
end