[英]How to query for a node that is connected to multiple nodes in Arango DB graph
我有一個圖,其中包含兩種類型的節點:景點和酒店。
我想做的就是查詢被三個景點包圍的酒店 。 我現在(在下面)的查詢提供了至少與一個景點相關的酒店。
FOR document IN Attraction
FOR vertex, edge, path IN 1..2 OUTBOUND document GRAPH "LondonAttractionDB"
FILTER path.vertices[0].entityTypes[0] == "Attraction" OR path.vertices[0].entityTypes[0] == "Attraction" OR path.vertices[0].entityTypes[0] == "Attraction"
FILTER path.vertices[1].entityTypes[0] == "Hotel"
FOR prop4 IN path.edges[0].properties
FILTER prop4.name == "name" AND prop4.value == "Food_and_beverage_location"
OR prop4.name == "name" AND prop4.value == "Food_and_beverage_location"
OR prop4.name == "name" AND prop4.value == "Accommodation_location"
RETURN DISTINCT path
這給出了以下結果。 (橙色-酒店,綠色-景點)
如何在圈子中顯示結果? (與三個景點相連的酒店)
任何幫助深表感謝。
沒有數據集的詳細信息(文檔結構和集合),很難回答,但是根據您的示例查詢和描述,我將使用另一種方法:
FOR hotel IN Attraction
FILTER doc.entityTypes[0] == "Hotel"
LET attractions = (
FOR vertex IN 1..1 INBOUND hotel GRAPH "LondonAttractionDB"
FILTER vertex.entityTypes[0] == "Attraction"
RETURN 1
)
FILTER LENGTH(attractions) == 3
RETURN hotel
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