如何用另一个字典更新 Pymongo 文档？

Question

I am aware of the update and update_one methods, however I haven't seen anything related to updating documents with other dictionaries.

For example, if I have the document:

{
  "bang": "Foo",
  "bar": "baz"
}

How can I update it with a dictionary {'bang': 'bong'} that changes Foo to bong ?

Answer 1

If I am not wrong, you want to update a field with a dictionary's value.

Then, try the sample code:

Mongo Collection:

{
  "bang": "Foo",
  "bar": "baz"
}

Python Program:

from pymongo import MongoClient
mongo = MongoClient()
db = mongo.test #replace test with your db name
coll = db.testColl #replace testColl with your collection name
d = {'bang': 'bong'}
coll.update_one({}, {'$set': {'bang': d['bang']}})

Output:

{
    "bang" : "bong",
    "bar" : "baz"
}

If I this isn't what you need, then let me know.