MongoDB in Python through MongoEngine - playing with DynamicDocuments and instantiating different types of Documents in the same collection

dynamic_cases.py

from mongoengine import Document, DynamicDocument


class AppelateCase(Document):
    appelate_blob = StringField()

class BankruptcyCase(Document):
    bankrupcy_blob = StringField()

class MyCase(DynamicDocument):
    type = StringField()

    @classmethod
    def from_appelate(cls, appelate_case):
        mc = cls.from_json(appelate_case.to_json())
        mc.type = "AppelateCase"
        return mc

    @classmethod
    def from_bankrupcy(cls, bankrupcy_case):
        mc = cls.from_json(bankrupcy_case.to_json())
        mc.type = "BankruptcyCase"
        return mc