EmbeddedDocumentField和ReferenceField在mongoengine

我有一些非常简单的代码：EmbeddedDocumentField和ReferenceField在mongoengine

class User(db.Document): 
    username = db.StringField(max_length=25) 
    userid = db.StringField(max_length=25) 
    password = db.StringField(max_length=25) 

    def __repr__(self): 
    return '<User %r>' % (self.username) 


class DeviceDetails(db.Document): 
    profile = ReferenceField(User) 
    enduser = db.StringField(max_length=30, required = True) 
    model = db.StringField(max_length=25,required = True) 
    conversation = db.ListField(db.EmbeddedDocumentField('Conversation')) 

    def __repr__(self): 
     return self.enduser 

class Conversation(db.EmbeddedDocument): 
    message = db.StringField(max_length=250)

，每一个用户都会有一些设备的细节和一些谈话连接到每一个设备的细节。对话正在被附加到每个DeviceDetails如下所述：What is the difference between EmbeddedDocumentField and ReferenceField in mongoengine 这是正常工作。

现在我希望将用户关联到DeviceDetails。我尝试添加上面“链接”中提到的代码。但有一个错误：

>>> from feed.models import * 
>>> d = DeviceDetails(
... profile = 'aryan', 
... enduser = 'two', 
... model = 'nokia' 
...) 
Traceback (most recent call last): 
File "<console>", line 8, in <module> 
File "/home/anurag/virtual/vir/lib/python2.7/site-packages/mongoengine     
/base/document.py", line 85, in __init__ 
value = field.to_python(value) 
File "/home/anurag/virtual/vir/lib/python2.7/site-packages/mongoengine/fields.py", 
line 937, in to_python 
value = DBRef(collection, self.document_type.id.to_python(value)) 
File "/home/anurag/virtual/vir/lib/python2.7/site-packages/mongoengine 
/base/fields.py", line 392, in to_python 
value = ObjectId(value) 
File "/home/anurag/virtual/vir/lib/python2.7/site-packages/bson/objectid.py", line 90, 
in __init__ 
self.__validate(oid) 
File "/home/anurag/virtual/vir/lib/python2.7/site-packages/bson/objectid.py", line 
194, in __validate 
raise InvalidId("%s is not a valid ObjectId" % oid) 

InvalidId: aryan is not a valid ObjectId

我在用户模式部分用户

>>> User.objects.all() 
[<User u'anurag'>, <User u'aryan'>]

谁能告诉我什么，我做错了什么？

来源

2014-01-20 anurag619

根据您的模式Profile是一个引用字段，这意味着它将存储它引用的对象的id。

你应该将其设置为用户的雅利安人（或只是将其设置为雅利安用户对象）的id如：

aryan = User.objects(name="aryan").first() 
device = DeviceDetails(profile=aryan, enduser='two', model='nokia').save()

来源

2014-01-20 12:35:45 Ross

EmbeddedDocumentField和ReferenceField在mongoengine

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