與那裏的條件CYPHER多個可選的比賽

Question

我在數據庫中有三個對象：個人，國家和汽車，可以與

create (:Car { name: 'car-987' }) 
create (:Car { name: 'car-876' }) 
create (:Country { name: 'country-123' }) 
create (:Country { name: 'country-234' }) 
create (:Country { name: 'country-345' }) 
match (cnt:Country { name: 'country-123' }), (cr:Car { name: 'car-987' }) create (cr)<-[:HAS_CAR]-(:Person { name: 'person-abc' })-[:LIVES_IN]->(cnt) 
match (cnt:Country { name: 'country-234' }) create (:Person { name: 'person-bcd' })-[:LIVES_IN]->(cnt) 
match (cr:Car { name: 'car-876' }) create (cr)<-[:HAS_CAR]-(:Person { name: 'person-cde' }) 

我選擇者可以創建帶有可選的國家，車載信息對象

match (prs:Person) 
optional match (prs)-[:LIVES_IN]->(cnt:Country) 
optional match (prs)-[:HAS_CAR]->(cr:Car) 
return id(prs) as id, prs.name as person, cnt.name as country, cr.name as car 
order by person asc 

結果是：

╒════╤════════════╤═════════════╤═════════╕ 
│"id"│"person" │"country" │"car" │ 
╞════╪════════════╪═════════════╪═════════╡ 
│62 │"person-abc"│"country-123"│"car-987"│ 
├────┼────────────┼─────────────┼─────────┤ 
│63 │"person-bcd"│"country-234"│null  │ 
├────┼────────────┼─────────────┼─────────┤ 
│64 │"person-cde"│null   │"car-876"│ 
└────┴────────────┴─────────────┴─────────┘ 

的問題開始，如果我試圖使用一些條件。例如，我只需要得到country.name包含'4'或car.name包含'6'的記錄。 有我希望得到的條件：

╒════╤════════════╤═════════════╤═════════╕ 
│"id"│"person" │"country" │"car" │ 
╞════╪════════════╪═════════════╪═════════╡ 
│63 │"person-bcd"│"country-234"│null  │ 
├────┼────────────┼─────────────┼─────────┤ 
│64 │"person-cde"│null   │"car-876"│ 
└────┴────────────┴─────────────┴─────────┘ 

我該如何實現它？ 如果我嘗試使用WHERE裏面可選MATCH

match (prs:Person) 
optional match (prs)-[:LIVES_IN]->(cnt:Country) where cnt.name contains '4' 
optional match (prs)-[:HAS_CAR]->(cr:Car) where cr.name contains '6' 
return id(prs) as id, prs.name as person, cnt.name as country, cr.name as car 
order by person asc 

沒有得到預期的結果：

╒════╤════════════╤═════════════╤═════════╕ 
│"id"│"person" │"country" │"car" │ 
╞════╪════════════╪═════════════╪═════════╡ 
│62 │"person-abc"│null   │null  │ 
├────┼────────────┼─────────────┼─────────┤ 
│63 │"person-bcd"│"country-234"│null  │ 
├────┼────────────┼─────────────┼─────────┤ 
│64 │"person-cde"│null   │"car-876"│ 
└────┴────────────┴─────────────┴─────────┘ 

也在想使用類似

match (prs:Person), 
(prs)-[:LIVES_IN*0..1]->(cnt:Country), 
(prs)-[:HAS_CAR*0..1]->(cr:Car) 
where cnt.name contains '4' or cr.name contains '6' 
return id(prs) as id, prs.name as person, cnt.name as country, cr.name as car 
order by person asc 

但是這一次不要」 t返回任何記錄。

Answer 1

你靠近，儘量保持你的可選匹配，但隨着使用與WHERE子句用於強制過濾的休息：

match (prs:Person) 
optional match (prs)-[:LIVES_IN]->(cnt:Country) 
optional match (prs)-[:HAS_CAR]->(cr:Car) 
with prs, cnt, cr 
where cnt.name contains '4' or cr.name contains '6' 
return id(prs) as id, prs.name as person, cnt.name as country, cr.name as car 
order by person asc