如何在自定義 arangosearch 分析器中刪除空字符串

Question

我有一個自定義分析器，類似於 text_en 但不包含連字符作為分隔符：

{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"}}]}'

問題是這樣的鏈接將返回空字符串。 字符串“HYPNOS2、Aphrodite 和其他微控制器”的標記。 這是：

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

我該怎么做才能刪除此分析器中的空字符串標記？

Answer 1

我在分隔符之后在管道中添加了另一個階段。 這是一個帶有keepNull=false 和返回@param==""?null:@param 的queryString 的aql。 如果有人有更簡單的建議，我很感興趣。