Question 117328 in Mongodb Question posted in
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Mongodb – Use keys as variables in python

I’m trying to remove the keys from a mongoengine Document in python:

document.update(unset__name=True)
document.update(unset__surname=True)
document.update(unset__dob=True)
...

but instead of the above I would like to loop through them and use a variable, something like:

document.update(unset__<key>=True)

Is this possible?

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2

Answers


  1. 0

    with a map ? you can build it and put as function kwargs

    unset_map = {
    "unset_key": True
}
document.update(**unset_map)
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  2. 0

    yes, this is feasible by destructuring a dictionary.
    For example, like in there:

    d = { "p1": 11, "p2": 12}
def f(p1,p2):
    print(f"p1={p1}, p2={p2}")

f(p2=100,p1=10)
f(**d)

    In your case, you will simply have to build a dictionnary with all the keys you want to destroy, by building the correct string:

    def delete_key(key_name: str):
    d = { f"unset__{key_name}": True }
    document.update(**d)
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