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[英]Create atmost one relationship for newly created node with existing node based on some property
[英]How can I create nodes and create a one-to-many relationship another newly created node?
UNWIND $likedMovies AS likedMovie
MERGE (lm:LikedMovie {
id: likedMovie.id,
name: likedMovie.name,
})
CREATE p = (:Person $person)-[:LIKES]->(lm)
這並不能解決我的問題,因為它為每個likedMovie
創建了一個新 Person 相反,我希望單個Person
與所有likedMovie
相關
我也試過這個:
UNWIND $likedMovies AS likedMovie
MERGE (lm:LikedMovie {
id: likedMovie.id,
name: likedMovie.name,
})
CREATE p = (:Person $person)
FOREACH (lm in likedMovie |
MERGE (p)->[:LIKES]-(lm)
)
但是,它給了我一個錯誤p
是一個路徑並且需要是一個Node
當您分配 p = (:Person) 時,它會創建一個包含節點的路徑。 但是如果你分配一個變量 (p:Person),變量 p 就是節點本身。 因此,您可以使用它來創建與 p 一對多的關系。
CREATE (p:Person $person)
UNWIND $likedMovies AS likedMovie
WITH p, likedMovie
MERGE (p)-[:LIKES]->(likedMovie)
這個模板應該可以做到(雖然我不知道$person
中有什么)
CREATE (p:Person {name: $person})
FOREACH(m in $likedMovies |
MERGE (lm:LikedMovie {id: m.id, name: m.name})
MERGE (p)-[:LIKES]->(lm)
)
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