Problem Statement/Rationale

If mongodump dumps a view without an error. Mongorestore should not produce a format error when restoring the dumped file.

Steps to Reproduce

Create a view that has the following definition using the go driver:

pipeline := []bson.M{
		{"$match": bson.D{
			{"createdAt", bson.D{
				{"$gte", bson.D{{"$date", "2024-05-20T23:59:59Z"}}}},
			}},
		},
	}
	createCmd := bson.D{
		{"create", "test view"},
		{"viewOn", colName},
		{"pipeline", pipeline},
	}

Note that the document within $gte is an object instead of a date. Both key and value are strings, but the key is "$date".

Run mongodump and mongorestore on this view.

Expected Results

Mongorestore should restore the view with the same pipeline.

Actual Results

Mongoresture fails with an error:

Failed: restore error: error parsing metadata from archive <file>: invalid JSON input; expected {

Additional Notes

Mongodump uses the go driver marshal function to dump a view's definition from BSON to canonical ext JSON format:

bson.MarshalExtJSON(meta, true, false)

Mongorestore does the reverse:

bson.UnmarshalExtJSON(jsonBytes, true, meta)

MarshalExtJSON marshals the format without an error, but UnmarshalExtJSON on the previously marshaled content returns the format error.