I am just learning MongoDB queries and I have been trying to do the following for a few hours now: I have a class defined as
class Uni(mongoengine.Document):
instruments =mongoengine.ListField(mongoengine.ReferenceField(Instrument))
where Instrument is another Document object. Now I want to find a specific reference to Instrument object "old_instrument" in the ListField and replace the reference by a reference to "new_instrument". I have been trying the following:
Uni.objects(instruments=old_instrument).update(**{"set__$":new_instrument})
Can someone help me and elaborate the solution a little bit? Thank you very much!
so the solution I found is to read the array out from the database first, then modify it and update it back to the database. There seems to be no direct query solution.