elasticsearch-dsl Exception has occurred: KeyError '*'

原因: elasticsearch-dsl 版本不对
版本要求

• Elasticsearch 6.x
  • elasticsearch-dsl>=6.0.0,<7.0.0
• Elasticsearch 5.x
  • elasticsearch-dsl>=5.0.0,<6.0.0
• Elasticsearch 2.x
  • elasticsearch-dsl>=2.0.0,❤️.0.0