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I'm trying to figure a quick way to replace blank strings ('') that I have in a lot of my documents (across many fields) with MongoDB's null value.

In MongoDB docs, I was hoping to use ReplaceAll, but I can't figure out how to execute the same thing in pymongo unless I do replace_one().

Is there an efficient way to do this?

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    You can use the Collection's update_many method for this purpose. I guess you need to specify all the fields that requires the update - both in the query filter and the update. Commented Jul 8, 2022 at 5:15

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Currently pymongo does not support replace all. Most effective way to update many documents would be update_many. It looks something like this:

db.my_db.update_many(
    filter={'field_1': ""},
    update={'$set': {'field_1': None}}
)
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