Question to tutorial and inserting data

[Thomas Klinger]

Hi,

I'm really new to MongoEngine and MongoDB, but I try to learn it at the moment. Therefore I've gone through the tutorial from the docs page and have a question on this.

In the tutorial you create an object by adding a user to the collection. In the example the objects are named "john" and "ross". Now, adding posts with this information is not the problem, but how do I insert data later on, i.e. when I try to insert data later on?

I tried to get the correct user again in a new session:

from mongoengine import *
from testdb import *

connect('testdb')
john=User.objects(first_name="john").first()
ross=User.objects(first_name="ross").first()

post1 = TextPost(title="Awesome posting!", author=john)
post1.content = "My sample text!"
post1.tags=['awesometag']
post1.save()

Now, the only thing I get is an error:

bson.errors.InvalidDocument: cannot encode object: [<User: User object>], of type: <class 'mongoengine.queryset.queryset.QuerySet'>

So, my question on this would be how to insert a posting to this specific user without specifying it again with "User(first_name=....)"? Imagine if there will be passwords saved in the User collection.

Many thanks in advance for your answers and maybe apologize this newbie question.

Regards, Thomas

[Thomas Klinger]

I think I might have found a solution. get() seems to solve that problem:

ross=User.objects.get(first_name="Ross")
post=LinkPost(title="Awesome video",author=ross)
post.link_url="https://youtube.com"
post.tags=['youtube']
post.save()

And it does the job, the post is saved.

Regards, Thomas