Question

从py2neo网站的例子： http://py2neo.org/v3/ogm.html

class Movie（GraphObject）：

__primarykey__ = "title"

title = Property()
tag_line = Property("tagline")
released = Property()

actors = RelatedFrom("Person", "ACTED_IN")
directors = RelatedFrom("Person", "DIRECTED")
producers = RelatedFrom("Person", "PRODUCED")

class Person（GraphObject）：

__primarykey__ = "name"

name = Property()
born = Property()

acted_in = RelatedTo(Movie)
directed = RelatedTo(Movie)
produced = RelatedTo(Movie)

有没有办法指定关系的属性？例如。我想为这段关系增加权重。

由于

Answer 1

实例化p = Person()对象后，这是help(p.acted_in.add)的输出：

Signature: p.acted_in.add(obj, properties=None, **kwproperties)
Docstring:
Add a related object.

:param obj: the :py:class:`.GraphObject` to relate
:param properties: dictionary of properties to attach to the relationship (optional)
:param kwproperties: additional keyword properties (optional)
File:      /usr/local/lib/python3.6/site-packages/py2neo/ogm.py
Type:      method```

因此，如果您实例化了m = Movie()个对象，则可以调用例如

p.acted_in.add(m, properties={"weight": 0.74})

Py2neo OGM创建与属性的关系

1 个答案: