将Elastic Search字段转换为数组

您可以改用此脚本。它检查是否

movies

{  "script" : "if (ctx._source.movies.getClass().isArray()) { ctx._source.movies += tag } else { ctx._source.movies = [ctx._source.movies, tag] }",  "params" : {    "tag" : "Pulp Fiction"  }      }

另一种较短的方法是始终分配一个数组，然后使用Groovy的

Collection.flatten()

{  "script" : "ctx._source.movies = [ctx._source.movies, tag].flatten()",  "params" : {    "tag" : "Pulp Fiction"  }      }