如何使用計數過濾WHERE？

這個工作查詢開始：如何使用計數過濾WHERE？

MATCH (post:Post)<-[:AUTHOR]-(author:User) 
    WHERE post.createdAt > { hotAfter } AND post.text =~ { keyword } 
    MATCH (post)-[:HAS_COMMENT]->(comment:Comment)<-[:AUTHOR]-(commentAuthor:User) 
    WITH post, author, count(DISTINCT commentAuthor) as participantsCount, count(comment) as commentsCount 
    ORDER BY (participantsCount * commentsCount) DESC 
    RETURN collect(post {.*, author, participantsCount, commentsCount})[0..{ LIMIT }] as posts

我還喜歡濾波器的評論數量符合條件的職位：

WHERE (count(DISTINCT commentAuthor) * count(comment)) <= { someNumber }

但我不知道在哪裏/如何申請這個邏輯例如這是不正確的：

MATCH (post:Post)<-[:AUTHOR]-(author:User) 
    WHERE post.createdAt > { hotAfter } AND post.text =~ { keyword } 
    MATCH (post)-[:HAS_COMMENT]->(comment:Comment)<-[:AUTHOR]-(commentAuthor:User) 
    WHERE count(DISTINCT commentAuthor) * count(comment) <= 10 
    WITH post, author, count(DISTINCT commentAuthor) as participantsCount, count(comment) as commentsCount 
    ORDER BY (participantsCount * commentsCount) DESC 
    RETURN collect(post {.*, author, participantsCount, commentsCount})[0..{ LIMIT }] as posts

來源

2017-04-01 kayla

你做你的ORDER BY之前，您可以將其添加爲WHERE子句：

MATCH (post:Post)<-[:AUTHOR]-(author:User) 
WHERE post.createdAt > { hotAfter } AND post.text =~ { keyword } 
MATCH (post)-[:HAS_COMMENT]->(comment:Comment)<-[:AUTHOR]-(commentAuthor:User) 
WITH post, author, count(DISTINCT commentAuthor) as participantsCount, count(comment) as commentsCount 
WITH post, author, participantsCount, commentsCount, participantsCount * commentsCount as countProduct 
ORDER BY countProduct DESC 
WHERE countProduct <= { someNumber } 
RETURN collect(post {.*, author, participantsCount, commentsCount})[0..{ LIMIT }]

來源

2017-04-02 20:38:19 InverseFalcon

嗨，其實只是嘗試了這一點，並查詢似乎無效。 – kayla

你能提供關於錯誤的更多細節嗎？ – InverseFalcon

'無效的輸入'D'（第6行，第5列（偏移量：308））「ORDER BY participantsCount * commentsCount DESC」 ^' – kayla

過濾集合在最後似乎工作。

MATCH (post:Post)<-[:AUTHOR]-(author:User) 
    WHERE post.createdAt > { hotAfter } AND post.text =~ { keyword } 
    MATCH (post)-[:HAS_COMMENT]->(comment:Comment)<-[:AUTHOR]-(commentAuthor:User) 
    WITH post, author, count(DISTINCT commentAuthor) as participantsCount, count(comment) as commentsCount 
    ORDER BY (participantsCount * commentsCount) DESC 
    RETURN filter (
    x in collect(post {.*, author, participantsCount, commentsCount}) 
    WHERE (x.participantsCount * x.commentsCount) <= { someNumber } 
)[0..{ LIMIT }] as posts

來源

2017-04-01 01:53:18 kayla

如何使用計數過濾WHERE？

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