删除Sesam DTL中的空属性

Question

使用Sesam时，我只剩下一堆null属性。

如何继续跳过DTL中完全为空的属性？任何能做到这一点的DTL示例都会很棒。

示例

发自：

{
  "address": "37484 Mohr Freeway\nNew Myrnaview, MI 89092",
  "birth_date": "2001-02-18",
  "column1": "01ba3bc2-8e22-4971-9683-b2ae05a39cd1",
  "column2": "null",
  "company": "Fay-Cole",
  "credit_card": "4049553515365",
  "first_name": "Dummy",
  "home_page": "http://www.mante.com/faq/",
  "job": "Airline pilot",
  "last_name": "User",
}

至：

{
  "address": "37484 Mohr Freeway\nNew Myrnaview, MI 89092",
  "birth_date": "2001-02-18",
  "column1": "01ba3bc2-8e22-4971-9683-b2ae05a39cd1",
  "company": "Fay-Cole",
  "credit_card": "4049553515365",
  "first_name": "Dummy",
  "home_page": "http://www.mante.com/faq/",
  "job": "Airline pilot",
  "last_name": "User",
}