RUST-1107 Fix array relaxed extended json

[pacifistes]

Hi,

It seems that relaxed extended json doesn't work for arrays, here is an example:

use bson::serde_helpers::chrono_datetime_as_bson_datetime;
use serde_json::Value;
use chrono::Utc;
use chrono::TimeZone;
use serde::{
    Deserialize,
    Serialize,
};

#[derive(Serialize, Deserialize, Debug, Clone)]
pub struct Foo {
    #[serde(with = "chrono_datetime_as_bson_datetime")]
    pub date: chrono::DateTime<Utc>,
}

fn main() {
    let foo = Foo {
        date: Utc.ymd(2018, 1, 1).and_hms(0, 0, 0),
    };
    let bson = bson::to_bson(&foo).unwrap();
    let expected: Value = serde_json::from_str(r#"{"date":{"$date": "2018-01-01T00:00:00Z"}}"#).unwrap();
    println!("{:?}", expected); //Object({"date": Object({"$date": String("2018-01-01T00:00:00Z")})})
    assert_eq!(expected, bson.into_relaxed_extjson()); // WORK

    let list = vec![foo];
    let bson = bson::to_bson(&list).unwrap();
    let expected: Value = serde_json::from_str(r#"[{"date":{"$date": "2018-01-01T00:00:00Z"}}]"#).unwrap();
    println!("{:?}", expected); //Array([Object({"date": Object({"$date": String("2018-01-01T00:00:00Z")})})])
    assert_eq!(expected, bson.into_relaxed_extjson()); // NOT WORK
}

If i run, i get:

thread 'main' panicked at 'assertion failed: `(left == right)`
  left: `Array([Object({"date": Object({"$date": String("2018-01-01T00:00:00Z")})})])`,
 right: `Array([Object({"date": Object({"$date": Object({"$numberLong": String("1514764800000")})})})])`', src/main.rs:30:5

So i changed this:

Bson::Array(v) => json!(v)

to this:

Bson::Array(v) => Value::Array(v.into_iter().map(Bson::into_relaxed_extjson).collect())

[bajanam]

Hello and thanks for the feedback, our team will review the issue/pull request and comment back.

[patrickfreed]

This is indeed a bug, thank you for reporting and fixing it! I just have one small comment, but otherwise looks good to me.

[patrickfreed]

LGTM! Thanks again for your contribution! Tagging in the rest of the team for review

[abr-egn]

LGTM!

[isabelatkinson]

thanks for your contribution!