DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': 'admin_db',
        'USER': 'root',
        'PASSWORD': 'root',
        'HOST': 'localhost',
    },

}

from mongoengine import connect
connect(
db='pom',
username='admin',
password='root',
host='mongodb://admin:root@localhost'
)

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': 'admin_db',
        'USER': 'root',
        'PASSWORD': 'root',
        'HOST': 'localhost',
    },

    'your_desired_db_name' : {
        'ENGINE' : 'django_mongodb_engine',
        'NAME' : 'db_name'
}