gistfile1.py

from mongoengine.document import Document, EmbeddedDocument

class DecisionDocument(EmbeddedDocument):

    guilt = fields.StringField(required=True)
    details = fields.DictField()
    
    meta = {'allow_inheritance': False}


class BaseDocument(Document):

     __metaclass__ = CompressedKeyDocumentMetaclass

     meta = {'abstract':True}


class TrialDocument(BaseDocument):

    jury = fields.StringField()
    judge = fields.IntField()
    decision = fields.ListField(fields.EmbeddedDocumentField(DecisionDocument))
    
    meta = {'allow_inheritance': False, 'compress_keys': True}