title: Updating an embedded document in mongoengine
body: <p>I have a class in mongoengine</p>
  <pre><code>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))
  </code></pre>
  <p>I am trying to update the <code>Post</code> <code>EmbeddedDocument</code> property name text from a certain &quot;Parent&quot; document.
  As a first step, I retrieve the Feed Document</p>
  <pre><code>model = Feed.objects(_id=&quot;....&quot;).first()
  </code></pre>
  <p>and then I want to update the property text of the embedded document &quot;Post&quot;.</p>
  <p>How can I achieve it with mongoengine?</p>