Mongoengine Add or Remove EmbeddedDocument in ListField of EmbeddedDocuments

add_multiple_embedded_documents.py

# roles as Python list of dictionaries
roles = [
    {'org': 'ABC', 'permissions':['RO', 'RW']},
    {'org': 'DEF', 'permissions':['RO', 'RW']},
    {'org': 'GHI', 'permissions':['RO', 'RW']},
    {'org': 'JKL', 'permissions':['RO', 'RW']},
]

# get user object
user = User.objects(id=ObjectId('user_id')).first()

# create an EmbeddedDocument of Role for each element and append to ListField
for role_dict in roles:
    role = Role(**role_dict)
    user.roles.append(role)

# Save the Mongo Document
user.save()

example_model.py

from mongoengine import Document
from mongoengine import EmbeddedDocument

from mongoengine.fields import EmbeddedDocumentField
from mongoengine.fields import ListField
from mongoengine.fields import StringField


class User(Document):
    roles = ListField(EmbeddedDocumentField(Role))


class Role(EmbeddedDocument):
    org_name = StringField()
    permissions = ListField(StringField())

remove_multiple_embedded_documents.py

# orgs against which user's access to be removed.
orgs = ['ABC', 'JKL']

# get user object
user = User.objects(id=ObjectId('user_id')).first()

# remove all the roles from user for which org "is in" orgs
user.update(pull__roles__org__in=orgs)