mongoengine ReferenceField mongoengine.errors.ValidationError

Question

需要你的帮助.我尝试使用mongoengine,烧瓶,烧瓶登录.

我的模特:

class Post(db.Document):
   text = db.StringField(max_length=240)
   pub_date = db.DateTimeField(default=datetime.datetime.now)
   author = db.ReferenceField(Member)

我得到当前用户(flask-login):

from flask.ext.login import current_user

比在views.py中:

new_post = Post()
    new_post.text = 'bla-bla'
    #new_post.author = current_user                                 #- DON`T WORK
    new_post.author = Member.objects.get(id=current_user.id)        #-WORK (WHY?)
    new_post.save()

有什么错new_post.author = current_user,如果new_post.author = Member.objects.get(id=current_user.id)-工作正常.

如果尝试new_post.author = current_user- 获取错误:

mongoengine.errors.ValidationError
ValidationError: ValidationError (Post:None) (A ReferenceField only accepts DBRef or documents: ['author'])

谢谢,人.

Answer 1

发生这些错误是因为current_user具有LocalProxy类型,而mongo正在寻找引用.虽然current_user在许多方面与Member它代理的实际对象的工作方式相同,但它不能用作引用,因为没有关于mongo的引用集合的信息可用作DBRef.

如果你想避免使用Member.objects.get(id = current_user.id)来获取实际对象,你可以从中获取实际Member对象current_user:

new_post.author = current_user._get_current_object()

或者只是DBRef:

new_post.author = current_user.to_dbref()