如何在密碼neo4j中正確執行OR條件

Question

我正在為Neo4j做一個交友網站以便娛樂，並在匹配查詢中掙扎

WITH  COLLECT(DISTINCT other) as to_exclude
MATCH (other:user) WHERE 'man' IN other.interest AND NOT other.email = 'some.email@gmail.com' AND other:man OR other:woman AND 'man' IN other.interest AND NOT other.email  = 'some.email@gmail.com'
WITH to_exclude, COLLECT(DISTINCT other) AS result  
WITH [elem IN result WHERE NOT elem IN to_exclude | elem] AS final_result
UNWIND final_result AS to_return
RETURN to_return

但這是一個可怕的查詢，因為OR迫使我重復自己

開始時，我在做類似WHERE other:man OR other:woman AND ...但是似乎OR組的第一部分不受我的其他條件限制。

所以我不得不重復我自己condition1 AND condition2 OR condition3 AND contidion1

我想要更實用，更易讀的東西

Answer 1

由於某些原因，似乎沒有為Cypher記錄AND和OR的運算符優先級 。 但是，使用這個不錯的測試，我們可以知道AND優先級高於OR 。

因此，查詢中的該子句（經過重新格式化以顯示有趣的模式）：

WHERE
  'man' IN other.interest AND NOT other.email = 'some.email@gmail.com'
  AND
  other:man

    OR

  other:woman
  AND
  'man' IN other.interest AND NOT other.email = 'some.email@gmail.com'

可以簡化為以下等效子句：

WHERE
  (other:man OR other:woman) AND 'man' IN other.interest AND NOT other.email = 'some.email@gmail.com'