Pymongo-在原始查询的结果中排除字段

Question

According to MongoEngine Docs on Raw Queries , a raw query can be used in Python when getting a collection of objects like so:

Page.objects(__raw__={'tags': 'coding'})

What would be an example of using this method to exclude a particular field from the results?

Answer 1

You can't use __raw__ for this, you have 2 options:

Using mongoengine, you need to use exclude :

Page.objects(__raw__={'tags': 'coding'}).exclude('field1', 'field2')

Using pymongo (the underlying driver) - but then you won't be able to iterate over mongoengine Page instances but only over simple dict's (ie pymongo's output):

page_collection = Page._get_collection()
query = page_collection.find({'tags': 'coding'}, {'field1': False, 'field2': False})