Creating an Array of ObjectID for MongoDB Aggregation about bson-rust HOT 4 CLOSED

Hi @nevi-me! The issue here is that the Bson::Array expects a Vec<Bson>, and in this case you've provided a Vec<ObjectId>. If you wrap each ObjectId in Bson::ObjectId, this will work:

use bson::Bson;
use bson::oid::ObjectId;

// Note that you don't actually need to declare the type here; it will be inferred properly.
let mut ids= vec![];

for x in object_ids.iter() {
    ids.push(Bson::ObjectId(ObjectId::with_string(x).unwrap()));
}

For some extra fun, here's how you could do it using iterators instead of a for loop:

use bson::Bson;
use bson::oid::ObjectId;

let ids: Vec<_> = ["5b4289600000000000000000", "5b1afc600000000000000000"]
    .into_iter()
    .map(|oid_string| Bson::ObjectId(
        ObjectId::with_string(oid_string).unwrap()))
    .collect();

from bson-rust.

If you run into different issues, it's probably better to use separate issues; that way, other users who run into the same problem in the future can search for them more easily (and find the responses without having to scroll through a bunch of unrelated things). If you end up filing a bunch of issues, that's totally fine! Think of it as saving time for other users in the future by categorizing them.

from bson-rust.

Thanks @saghm! Do you mind if I keep this issue open for a bit longer? I'm converting a long pipeline from the Java API, and it's using quite a lot of aggregation features, so I might still get stuck with other computer issues that I can't resolve myself.

from bson-rust.

Thanks! I know some library maintainers prefer questions that might not be bugs asked on S/O. So I'm often unsure of how to strike a balance.

from bson-rust.