python - py2neo ogm incoming related is None，为什么？

Question

当我想使用 py2neo ogm 从节点获取传入关系时，我遇到了麻烦。这里有一个例子:

class A1(GraphObject):
    rFrom = RelatedFrom("A2", "A2")

class A2(GraphObject):
    rTo = RelatedTo("A1", "A1")

a1 = A1()
a2 = A2()
a2.rTo.add(a1)

GRAPH.push(a2)

n_a1 =  list(A1.select(GRAPH))[0]
n_a2 =  list(A2.select(GRAPH))[0]

print list(n_a1.rFrom)
print list(n_a2.rTo)

[]
[<A1 __id__=1006>]

所以，我不明白如何使用 ogm 映射获取传入关系。这是一个错误吗？或者我 ？感谢您的帮助。

Answer 1

我找到了解决方案，关系名称必须相同，相关属性不够。

class A1(GraphObject):
    rFrom = RelatedFrom("A2", "LINK")

class A2(GraphObject):
    rTo = RelatedTo("A1", "LINK")

a1 = A1()
a2 = A2()
a2.rTo.add(a1)

GRAPH.push(a2)

n_a1 =  list(A1.select(GRAPH))[0]
n_a2 =  list(A2.select(GRAPH))[0]

print list(n_a1.rFrom)
print list(n_a2.rTo)

[<A2 __id__=1007>]
[<A1 __id__=1006>]