Hi folks, I'm a Product Manager at MongoDB! We rel...

# kmongo

[Ashni Mehta]

Hi folks, I'm a Product Manager at MongoDB! We released the Kotlin driver a few months ago, and we'd love to hear some feedback -- if you've migrated from kmongo to the official driver, any pain points, etc. Feel free to chime in via 🧵!

[CLOVIS]

For now, we haven't migrated, mostly because of the cost of rewriting all our requests from

collection.find(
    User::gender eq "female",
    User::age eq 29,
)

to

val filter = Filters.and(Filters.eq(User::gender.name, "female"), <http://Filters.gt|Filters.gt>(User::age.name, 29))
val results = collection.find<Results>(filter)

which is much harder to read for no obvious benefit.

Would it be possible to clarify on the builder page how to create builders that use subfields? For example, if I have:

class User(
    val name: String,
    val preferences: Set<Preference>,
)

class Preference(
    val type: String,
)

how can I write a request using the builders that adds Preference("foo") to the user "test" , if they do not already have it? ($pushToSet). I haven't found an example of how to do this in the documentation.

[Ashni Mehta]

appreciate the feedback! i'll pass that along to our docs team.

[Ashni Mehta]

quick clarifying question -- we currently support $addToSet and $push and have examples around both of those. is there something specific you were hoping to see in the examples that isn't currently there?

[CLOVIS]

What I'm most interested in is “how to you do operations on a field that is not in the root document”, what is written `Parent::foo / Child::bar`in KMongo. All the examples I've seen in the doc only use a root document without nested documents (or maybe I missed one?)

[Ashni Mehta]

ah, understood. i'll ask the docs team to update the example data class that we use for that Builders page (and the examples). appreciate the feedback!

[CLOVIS]

Hey, do you know if such an example was added?

[Marcin Wisniowski]

Bump. I also didn’t migrate due to these issues