support for array_filters

[idoshr]

Add option to user array_filters in mongoengine

[bagerard]

Putting it in __raw__ is a bit weird as it means that __raw__ won't be a "raw" update dictionary passed as is to pymongo anymore but it would now be something that we parse because we are using it to pass custom keys.

The 2 alternatives that I see are

Document.objects
    .update(__raw__={'$set': {"tags.$[element]": 'test11111'}}).\
    .array_filters([{"element": {'$eq': 'test2'}}])

or
2)

Document.objects
    .update(__raw__={'$set': {"tags.$[element]": 'test11111'}}, array_filters=[{"element": {'$eq': 'test2'}}])

The second one seems to be slightly better in my opinion as it's not too far from the native pymongo api

collection.update_many(
    filter,
    update,
    upsert=False,
    array_filters=None,
    ...
)

What do you think?

[idoshr]

@bagerard
Option 2 it is exactly what I did. May be the documentation is bit confused.
But you can look at the testers.

[bagerard]

@bagerard Option 2 it is exactly what I did. May be the documentation is bit confused. But you can look at the testers.

Argh indeed I misunderstood that, let me re comment it accordingly

[bagerard]

please fix latest comments and it will be good to go

[bagerard]

Looks good, thanks for the contribution 👍

[jeonghanjoo]

This is just what I am now looking for. 👏