Updating a embedded documents in mongoengine

问题

I have a class mongoengine

class Post(EmbeddedDocument):
        uid = StringField(required=True)
        text = StringField(required=True)
        value = StringField()

class Feed(Document):
        label = StringField(required=True)
        feed_url = StringField(required=True)
        posts = ListField(EmbeddedDocumentField(Post))

I am trying update a element in Feed(posts) The first: I get a object Feed

model = Feed.objects(_id="....").first()

Continue I want update Post in model have text = "title".

How can I do it with mongoengine? Thanks

回答1:

I resolved it :)

Feed.objects(_id="...", posts__text="findvalue").update(set__posts__S__value="updatevalue")

回答2:

If I understand the question, I think something like this will work:

model = Feed.objects(_id="....").first()
for post in model.posts:
    if post.text == "title":
        post.value = "placeholder for real update"
model.save()

来源：https://stackoverflow.com/questions/14170479/updating-a-embedded-documents-in-mongoengine