#<User:placeholder_id
    @aggregation_cache = {},
    @attributes_cache = {},
    @destroyed = false,
    @marked_for_destruction = false,
    @new_record = true,
    @previously_changed = {},
    @readonly = false,
    attr_accessor :attributes = {
             "admin" => false,
        "created_at" => "1992-10-10 12:30:00",
                "id" => nil,
              "name" => "Diana",
              "rank" => 1
    },
    attr_reader :association_cache = {},
    attr_reader :changed_attributes = {
             "admin" => nil,
        "created_at" => nil,
              "name" => nil,
              "rank" => nil
    },
    attr_reader :mass_assignment_options = nil
>
