MongoEngine 0.5：RuntimeError：在調用一個Python對象在

Question

>>> from mongoengine import * 
    >>> connect('foo') 
    >>> class Foo(Document): 
    ... bar = ListField(ReferenceField('Foo')) 
    >>> a = Foo() 
    >>> a.save() 
    >>> b = Foo() 
    >>> b.save() 
    >>> a.bar.append(b) 
    >>> a.save() 
    >>> b.bar.append(a) 
    >>> b.save() 

結果超過最大遞歸深度：在MongoEngine 0.5「RuntimeError而 調用Python對象最大遞歸深度超過」。我如何解決這個問題？

Answer 1

這已在dev分支中修復 - 請更新。

Answer 2

RTD - >http://mongoengine-odm.readthedocs.org/en/latest/guide/defining-documents.html#reference-fields

To add a ReferenceField that references the document being defined, use the string 'self' in place of the document class as the argument to ReferenceField‘s constructor.

試試這個：

class Foo(Document): 
    bar = ListField(ReferenceField('self'))