What is the proper way to update a listfield of embedded documents in mongoengine?

Question

I am trying to define methods for performing checks and updates to a listfield of embedded documents in mongoengine. What is the proper way of doing what I\'m trying to do. The

Answer 1

You could use an EmbeddedDocumentListField instead of a list of embedded documents. That way you get access to some handy methods like filter, create or update:

class Comment(EmbeddedDocument):
    created = DateTimeField()
    text = StringField()

class Post(Document):
    comments = EmbeddedDocumentListField(Comment)

    ...

    def add_or_replace_comment(self, comment):
        existing = self.comments.filter(created=comment.created)
        if existing.count() == 0:
             self.comments.create(comment)
        else:
             existing.update(comment)

(code not tested)