Embedded Documents issue with MongoEngine

Question

I am using MongoDB with Flask-MongoEngine as my ORM component to my web app. I have structured the User document schema like so: ``` from ..core import db class UserComics(db.EmbeddedDocument): favorites = db.SortedListField(db.StringField(), default=None) class UserSettings(db.EmbeddedDocument): display_favs = db.BooleanField(default=False) default_cal = db.StringField(default=None) show_publishers = db.ListField(db.StringField(), default=None) class UserTokens(db.EmbeddedDocument): refresh_token = db.StringField(default=None) access_token = db.StringField(default=None) expire_time = db.StringField(default=None) class User(db.Document, UserMixin): # Save User document to this collection meta = {'collection': 'users_test'} userid = db.StringField() full_name = db.StringField() first_name = db.StringField() last_name = db.StringField() gender = db.StringField() birthday = db.StringField() email = db.EmailField() friends = db.ListField(db.StringField()) date_creation = db.DateTimeField(…

Accepted Answer

Well you just have to create an embedded document object of the particular class, and then use it with the main document class, like so:

```
new_user = User()
user_settings = UserSettings()
user_settings.default_cal = resp['calendar']
new_user.settings = user_settings
# more stuff
new_user.save()
```

Note: Creating a new object only for the main document, does not automatically create the corresponding embedded document object(s), but while reading data ofcourse the case is different.

Edit:

As tbicr mentions below, we can also do this:

```
settings = db.EmbeddedDocumentField(UserSettings, default=UserSettings)
```

while declaring the field, that way we won't need to create the object as given in the first example.

Embedded Documents issue with MongoEngine

Solution

Problem