can I do unscoped inside filter

I override self.records methods

def self.records(options = {})
  Course.index_page
end

which return courses that have index flag.

in a filter, I'd like to return all courses that I've purchased.

  filter :paid, apply: ->(records, _value, _options) {
    records.unscoped.where(id:  some_ids)
  }

an error was returned if some_ids includes course that doesn't have index flag.

Internal Server Error: undefined method id' for nil:NilClass /../../gems/jsonapi-resources-ad12cbab49cf/lib/jsonapi/resource_serializer.rb:59:in block in serialize_to_hash'

do I implement it in a wrong way, or some issues here?

先从自定义的 records 方法和 filter :paid 回调开始，然后检查第 59 行的 jsonapi/resource_serializer.rb。使用包含一个没有 index 标志的课程的 some_ids 重现失败，并确定未限定 scope 的结果是否符合 serializer 的预期；当行为得到澄清，并由适当的回归测试覆盖或记录为不受支持时，即视为完成。