对于由两组节点组成的图表:
n1 - > n2 - > n3 - > N4
和
n5 - > n6 - > N7
使用命令创建:
创建(n1 {id:'n1'}) - [:rel] - >(n2 {id:'n2'}) - [:rel] - >(n3 {id:'n3'}) - [:rel] - >(n4 {id:'n4'})
创建(n5 {id:'n5'}) - [:rel] - >(n6 {id:'n6'}) - [:rel] - >(n7 {id:'n7'})
对于这两个请求:
MATCH p =(n {id:'n1'}) - [*] - (m)将节点(p)作为节点返回;
MATCH p =(n {id:'n1'}) - [*] - (m)RETURN关系(p)为rels;
AnormCypher(http://anormcypher.org/)返回仅与节点n1和n2相关的信息,而Neo4J Web控制台返回完整路径。
如何在AnormCypher中获取所有节点和关系的完整路径?
演示此功能的程序(在此消息的末尾)输出:
ListBuffer(NeoNode(32,Map(id -> n1)), NeoNode(33,Map(id -> n2)))
Node: id=32 props=Map(id -> n1)
--Props keys:
----key: id val: n1
Node: id=33 props=Map(id -> n2)
--Props keys:
----key: id val: n2
ListBuffer(NeoRelationship(27,Map(),32,33))
Rel: id=27 start=32 end=33 props=Map()
代码:
object Simple {
def main(args: Array[String]): Unit = {
Cypher("MATCH p = (n {id: 'n1'})-[*]-(m) RETURN nodes(p) as nodes;")().map { row =>
println(row[Seq[org.anormcypher.NeoNode]]("nodes"))
val nodes = row[Seq[org.anormcypher.NeoNode]]("nodes")
nodes.map(n => {
val props = n.props
println("Node: id="+n.id+" props="+props)
println("--Props keys: ")
val x = props.keys
props.keys.map( k=> println("----key: "+k+" val: "+props(k)))
})
}
Cypher("MATCH p = (n {id: 'n1'})-[*]-(m) RETURN relationships(p) as rels ;")().map { row =>
println(row[Seq[NeoRelationship]]("rels"))
val rels = row[Seq[NeoRelationship]]("rels")
rels.map(r => {
val x = r.props
println("Rel: id="+r.id+" start="+r.start+" end="+r.end+" props="+r.props)
})
}
}
}
答案 0 :(得分:0)
问题是你的map
函数正在创建一个惰性流,而你并没有迭代流的其余部分。如果您将.toList
或.last
添加到.map
的末尾,强制迭代整个流,则应获得更长的路径结果。
例如:
Cypher("MATCH p = (n {id: 'n1'})-[*]-(m) RETURN nodes(p) as nodes;")().map { row =>
println(row[Seq[org.anormcypher.NeoNode]]("nodes"))
val nodes = row[Seq[org.anormcypher.NeoNode]]("nodes")
nodes.map(n => {
val props = n.props
println("Node: id="+n.id+" props="+props)
println("--Props keys: ")
val x = props.keys
props.keys.map( k=> println("----key: "+k+" val: "+props(k)))
})
}.toList
或者,您可以使用.foreach
代替.map
,而Cypher("MATCH p = (n {id: 'n1'})-[*]-(m) RETURN nodes(p) as nodes;")().foreach { row =>
println(row[Seq[org.anormcypher.NeoNode]]("nodes"))
val nodes = row[Seq[org.anormcypher.NeoNode]]("nodes")
nodes.map(n => {
val props = n.props
println("Node: id="+n.id+" props="+props)
println("--Props keys: ")
val x = props.keys
props.keys.map( k=> println("----key: "+k+" val: "+props(k)))
})
}
会为您执行此操作。
更新:这是一个没有返回类型的示例:
{{1}}