我可以保存“节点”、“链接”,但不能保存“图表”(参见下面的错误)。使用 pymongo 2.1.1、Django-NoRel、Python 2.7:
from django.db import models
from djangotoolbox.fields import SetField, ListField, EmbeddedModelField
class Graph(models.Model):
links = ListField(EmbeddedModelField('Link'))
class Link(models.Model):
parent = EmbeddedModelField('Node')
child = EmbeddedModelField('Node')
class Node(models.Model):
extent = SetField() # set of strings e.g. "Gene-Bmp4"
intent = SetField() # set of strings
--
n1 = Node(extent=set(["Gene-bmp4"]),intent=set(["Attr1", "Attr2"]))
n2 = Node(extent=set(["Gene-fp4"]),intent=set(["Attr3", "Attr4"]))
link = Link(parent=n1, child=n2)
links = [link]
g = Graph(links=links)
g.save()
产生错误:
/Library/Python/2.7/site-packages/pymongo-2.1.1-py2.7-macosx-10.7-intel.egg/pymongo/collection.py:312:RuntimeWarning:无法编码-重新加载python模块并重试. 如果您在没有收到 InvalidDocument 异常的情况下看到此内容,请参阅 api.mongodb.org/python/current/faq.html#does-pymongo-work-with-mod-wsgi
Exception Type: InvalidDocument
Exception Value: Cannot encode object: set(['Attr2', 'Attr1'])
Exception Location: /Library/Python/2.7/site-packages/pymongo-2.1.1-py2.7-macosx-10.7-intel.egg/pymongo/collection.py in insert, line 312
有谁知道我该怎么办?