如何在自定义 arangosearch 分析器中删除空字符串

Question

我有一个自定义分析器，类似于 text_en 但不包含连字符作为分隔符：

{pipeline:[
 {type:"norm",properties:{
  locale: "en.utf-8", accent: false, case: "lower", stemming: false}},
 {type:"delimiter",properties:{delimiter:" "}},
 {type:"delimiter",properties:{delimiter:"!"}},
 {type:"delimiter",properties:{delimiter:"."}},
 {type:"delimiter",properties:{delimiter:","}},
 {type:"delimiter",properties:{delimiter:";"}},
 {type:"delimiter",properties:{delimiter:"?"}},
 {type:"delimiter",properties:{delimiter:"["}},
 {type:"delimiter",properties:{delimiter:"]"}},
 {type:"delimiter",properties:{delimiter:"{"}},
 {type:"delimiter",properties:{delimiter:"}"}},
 {type:"delimiter",properties:{delimiter:"("}},
 {type:"delimiter",properties:{delimiter:")"}},
 {type:"delimiter",properties:{delimiter:"<"}},
 {type:"delimiter",properties:{delimiter:">"}},
 {type:"delimiter",properties:{delimiter:"~"}},
 {type:"delimiter",properties:{delimiter:"@"}},
 {type:"delimiter",properties:{delimiter:"="}},
 {type:"delimiter",properties:{delimiter:"&"}},
 {type:"delimiter",properties:{delimiter:"|"}},
 {type:"delimiter",properties:{delimiter:"\n"}},
 {type:"stem",properties:{locale:"en.utf-8"}}]}'

问题是这样的链接将返回空字符串。 字符串“HYPNOS2、Aphrodite 和其他微控制器”的标记。 这是：

[
 "hypnos2",
 "",
 "aphrodit",
 "and",
 "other",
 "microcontrol",
 ""
]

我该怎么做才能删除此分析器中的空字符串标记？

Answer 1

我在分隔符之后在管道中添加了另一个阶段。 这是一个带有keepNull=false 和返回@param==""?null:@param 的queryString 的aql。 如果有人有更简单的建议，我很感兴趣。