mongoengine filter on DictField's dynamic keys

[Amit Diwan]

    class UserThings(DynamicDocument):
        username = StringField()
        things = DictField()
   
    dcrosta_things = UserThings(username='dcrosta')
    dcrosta_things.things['foo'] = 'bar'
    dcrosta_things.things['bad'] = 'quack'
    dcrosta_things.save()

Results in a MongoDB document like:

    { _id: ObjectId(...),
      _types: ["UserThings"],
      _cls: "UserThings",
      username: "dcrosta",
      things: {
        foo: "bar",
        baz: "quack"
      }
    }

Im using mongoengine and I'm not able to query on dict field's keys.

for e.g I have a list of things  `

thing_list = ['foo', 'faa', 'baz', 'xyz']

`

and I want to filter all `UserThings` that contains anyof these things...

something like ..  `

UserThings.objeect.filter(things__in=thing_list)

`

definitely this wont work. IS there any way to perform filtering on variable/dynamic keys on dictfield. if not, can we do it using pymongo/raw query?