Neo4J查詢不顯示路徑

我在城市中創建運輸測試數據庫。我的目標是在任何站點之間找到路徑。我創造了這個圖表：Neo4J查詢不顯示路徑

create (Stop_13_1:Tram {Id: 131}), 
(Stop_13_2:Tram {Id: 132}), 
(Stop_26_1:Tram {Id: 261}), 
(Stop_26_2:Tram {Id: 262}), 
(Stop_26_3_13_3:Tram {Id: 263133}), 
(Stop_26_4_13_4:Tram {Id: 264134}), 
(Stop_26_5_13_5:Tram {Id: 265135}), 
(Stop_26_6_13_6:Tram {Id: 266136}), 
(Stop_26_7_13_7:Tram {Id: 267137}), 
(Stop_26_8:Tram {Id: 268}), 
(Stop_7_1:Trollebus {Id: 71}), 
(Stop_7_2:Trollebus {Id: 72}), 
(Stop_7_3:Trollebus {Id: 73}), 
(Stop_7_4:Trollebus {Id: 74}), 
(Stop_7_5:Trollebus {Id: 75});

當我試圖找到一小段路：

match p=shortestPath((a)-[:TO*]-(c)) 
where a.Id=131 and c.Id=268 
return p, length(p) limit 1

或者這個查詢：

MATCH (p1:Tram {id: 131}), (p2:Tram {id: 263133}), 
     path = shortestpath((p1)-[:NEXT*]-(p2)) 
RETURN path

它沒有表現出任何的路線。你能幫我編輯查詢嗎？

P.S.我忘了補充關係：

MATCH (Stop_13_1 {Id: 131}), 
    (Stop_13_2 {Id: 132}), 
    (Stop_26_1 {Id: 261}), 
    (Stop_26_2 {Id: 262}), 
    (Stop_26_3_13_3 {Id: 263133}), 
    (Stop_26_4_13_4 {Id: 264134}), 
    (Stop_26_5_13_5 {Id: 265135}), 
    (Stop_26_6_13_6 {Id: 266136}), 
    (Stop_26_7_13_7 {Id: 267137}), 
    (Stop_26_8 {Id: 268}), 
    (Stop_7_1 {Id: 71}), 
    (Stop_7_2 {Id: 72}), 
    (Stop_7_3 {Id: 73}), 
    (Stop_7_4 {Id: 74}), 
    (Stop_7_5 {Id: 75}) 
    MERGE   (Stop_13_1)- [:NEXT{distance:4.7,route:13,transport:'tram',direct:'down'}]->(Stop_13_2) 
    MERGE   (Stop_13_2)-[:NEXT{distance:4.7,route:13,transport:'tram',direct:'up'}]->(Stop_13_1) 
    MERGE   (Stop_13_2)-[:NEXT{distance:3.7,route:13,transport:'tram',direct:'down'}]->(Stop_26_3_13_3) 
    MERGE   (Stop_26_3_13_3)-[:NEXT{distance:3.7,route:13,transport:'tram',direct:'up'}]->(Stop_13_2) 
    MERGE   (Stop_26_1)-[:NEXT{distance:5.8,route:26,transport:'tram',direct:'down'}]->(Stop_26_2) 
    MERGE   (Stop_26_2)-[:NEXT{distance:5.8,route:26,transport:'tram',direct:'up'}]->(Stop_26_1) 
    MERGE   (Stop_26_2)-[:NEXT{distance:2.5,route:26,transport:'tram',direct:'down'}]->(Stop_26_3_13_3) 
    MERGE   (Stop_26_3_13_3)-[:NEXT{distance:2.5,route:26,transport:'tram',direct:'up'}]->(Stop_26_2) 
    MERGE   (Stop_26_3_13_3)-[:NEXT{distance:3.1,route:26,route:13,transport:'tram',direct:'down'}]->(Stop_26_4_13_4) 
    MERGE   (Stop_26_4_13_4)-[:NEXT{distance:3.1,route:26,route:13,transport:'tram',direct:'up'}]->(Stop_26_3_13_3) 
    MERGE   (Stop_26_4_13_4)-[:NEXT{distance:5.8,route:26,route:13,transport:'tram',direct:'down'}]->(Stop_26_5_13_5) 
    MERGE   (Stop_26_5_13_5)-[:NEXT{distance:5.8,route:26,route:13,transport:'tram',direct:'up'}]->(Stop_26_4_13_4) 
    MERGE   (Stop_26_5_13_5)-[:NEXT{distance:10.8,route:26,route:13,transport:'tram',direct:'down'}]->(Stop_26_6_13_6) 
    MERGE   (Stop_26_6_13_6)-[:NEXT{distance:10.8,route:26,route:13,transport:'tram',direct:'up'}]->(Stop_26_5_13_5) 
    MERGE   (Stop_26_6_13_6)-[:NEXT{distance:2.5,route:26,route:13,transport:'tram',direct:'down'}]->(Stop_26_7_13_7) 
    MERGE   (Stop_26_7_13_7)-[:NEXT{distance:2.5,route:26,route:13,transport:'tram',direct:'up'}]->(Stop_26_6_13_6) 
    MERGE   (Stop_26_5_13_5)-[:NEXT{distance:0.6,transport:'walking',direct:'down'}]->(Stop_7_2) 
    MERGE   (Stop_7_2)-[:NEXT{distance:0.6,transport:'walking',direct:'up'}]->(Stop_26_5_13_5) 
    MERGE   (Stop_26_8)-[:NEXT{distance:1,route:26,transport:'tram',direct:'down'}]->(Stop_26_7_13_7) 
    MERGE   (Stop_26_7_13_7)-[:NEXT{distance:1,route:26,transport:'tram',direct:'up'}]->(Stop_26_8) 
    MERGE   (Stop_7_1)-[:NEXT{distance:2.2,route:7,transport:'trolleybus',direct:'down'}]->(Stop_7_2) 
    MERGE   (Stop_7_2)-[:NEXT{distance:2.2,route:7,transport:'trolleybus',direct:'up'}]->(Stop_7_1) 
    MERGE   (Stop_7_2)-[:NEXT{distance:1.6,route:7,transport:'trolleybus',direct:'up'}]->(Stop_7_3) 
    MERGE   (Stop_7_3)-[:NEXT{distance:2.5,route:7,transport:'trolleybus',direct:'up'}]->(Stop_7_4) 
    MERGE   (Stop_7_4)-[:NEXT{distance:3.1,route:7,transport:'trolleybus',direct:'down'}]->(Stop_7_5) 
    MERGE   (Stop_7_5)-[:NEXT{distance:4.4,route:7,transport:'trolleybus',direct:'down'}]->(Stop_7_2)

來源

2016-07-24 user3231442

您已經向我們展示了您的創建r節點，但我沒有看到任何關係的創建。你可以添加到你的描述？另外，你是否可以拆分創建，讓每個創建的元素都在自己的行上？不得不水平滾動瀏覽它使其很難閱讀。 – InverseFalcon

Christophe的答案是正確的，但對於下一步，我建議添加APOC程序插件，這將允許您使用加權最短路徑，該路徑將考慮您的：NEXT關係中的距離屬性。 https://github.com/neo4j-contrib/neo4j-apoc-procedures#graph-algorithms-work-in-progress – InverseFalcon

您正在試圖匹配有TO關係的最短路徑，但是你的圖表顯示，這種關係的類型是NEXT。

我複製在這裏你的圖http://console.neo4j.org/r/boin78

而下面的查詢工作正常通過只指定正確的關係類型：

match p=shortestPath((a)-[:NEXT*]-(c)) 
where a.Id=131 and c.Id=268 
return p, length(p) 
limit 1

對於第二個查詢，您使用的id作爲同時財產您節點具有Id屬性名稱，以下工作：

MATCH (p1:Tram {Id: 131}), (p2:Tram {Id: 263133}), 
path = shortestpath((p1)-[:NEXT*]-(p2)) 
RETURN path

來源

2016-07-24 17:44:30

Neo4J查詢不顯示路徑

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