C# MongoDB Upsert object inside array

Question

我想知道如何使用 MongoDB 的 C# 驱动程序在数组中插入对象。

文件结构：

{
    entity: {
        identifier: 'id-001',
        name: 'test-entity',
        status: [
            {
                serviceName: 'service-1',
                details: 'Processed by service-1'
            },
            {
                serviceName: 'service-2',
                details: 'Processed by service-2'
            }
        ]
    }
}

我认为这种方法可以完成工作：

public async Task SetStatusAsync(
    string kind,
    string identifier,
    SynchronizationStatus syncStatus)
{
    var collection = GetCollection(kind);

    var update = Builders<Document>.Update.Combine(
        Builders<Document>.Update.Set(x => x.Entity.Status[-1].ServiceName, syncStatus.ServiceName),
        Builders<Document>.Update.Set(x => x.Entity.Status[-1].Details, syncStatus.Details));

    var filter = Builders<Document>.Filter.And(
        Builders<Document>.Filter.Eq(doc => doc.Entity.Identifier, identifier),
        Builders<Document>.Filter.ElemMatch(x => x.Entity.Status, x => x.ServiceName == syncStatus.ServiceName));

    var options = new FindOneAndUpdateOptions<Document>
    {
        IsUpsert = true
    };

    var result = await collection.FindOneAndUpdateAsync(filter, update, options);

    return result.Entity;
}

...但是当给定实体的“状态”为空/空数组时，我收到以下错误：

位置运算符未从查询中找到所需的匹配项。

有什么建议吗？