获取在 be9 acl9 中应用角色的对象列表

Question

我认为是这样的：

def self.obj_list(opts = {:include => [] , :exclude => []})
    # Returns an array with all objects with roles applied
    # +:exclude+:: (array,string) optional object type to exclude from list
    # +:include+:: (array,string) optional object type to include in list
    # Example:
    #   Role.obj_list(:include => ["Device", "User"])
    #   Role.obj_list(:exclude => ["User"])

    inc = opts[:include].to_a
    exc = opts[:exclude].to_a

    objs = []
    if inc.empty?

      self.all.each do |r|
        unless r.authorizable_type.nil?
          objs << r.authorizable_type.constantize.find(r.authorizable_id) unless exc.include?(r.authorizable_type)
        end
      end

    else

      self.all.each do |r|
        unless r.authorizable_type.nil?
          objs << r.authorizable_type.constantize.find(r.authorizable_id) if inc.include?(r.authorizable_type)
        end
      end

    end
    objs
  end

Answer 1

您可以使用 where 子句在 SQL 中执行包含/排除操作：

( inc.empty?
? where.not( :authorizable_type => exc )
: where( :authorizable_type => inc )
).map(&:authorizable)

通过使用 authorized，您将获得 Rails 自己的多态关联处理，这将确保只有实际对象才被访问。返回，因此无需检查 nil

Answer 2

我不知道，也许你想链接对象和主题？
如果是这样，这里有一个教程： https://github.com/be9/acl9/wiki/tutorial:-linking-object-and-subject-with-hmt