C# MongoDb - 如何更新嵌套文档中的一个字段？

Question

我想要实现的是提供List<JobList>包含作业的客户端 ID 和内部 ID Finish()方法。 然后我想迭代客户端并更新所有匹配 JobInternalIds 的作业并将当前日期时间设置为 FinishedAt 字段。 问题是我完全不知道如何更新嵌套对象。

我尝试过类似下面的方法，但没有成功。

public class Client
{
    [BsonId]
    public ObjectId Id { get; set;}
    public string Name { get; set;}
    public List<Job> Jobs { get; set;}
}

public class Job
{
    public string InternalId { get; set;}
    public string Name { get; set;}
    public DateTime? FinishedAt { get; set;}
}

public class JobList
{
    public string ClientId { get; set; }
    List<string> JobInternalIds { get; set; }
}

public async Task Finish(List<JobList> joblist)
{   
    var updateDefinition = new UpdateDefinitionBuilder<Client>()
        .Set(x => x.Job[0].FinishedAt, DateTime.UtcNow); // don't know how to set datetime to finishedAt for each elements of collection that matches InternalIds

    foreach(var item in joblist)
    {
        await _db.Collection.UpdateManyAsync(item.ClientId, updateDefinition);
    }   
}

----------EDITED----------
public async Task Finish(List<JobList> joblist)
{
    var updateDefinition = Builders<Client>.Update
        .Set(x => x.Jobs[-1].FinishedAt, DateTime.UtcNow);

    foreach (var item in joblist)
    {
        var internalIds = item.JobInternalIds.Select(x => x.InternalId).ToList();   
        var idFilter = Builders<Client>.Filter.Eq(x => x.Id, item.ClientId);
        var internalIdsFilter = Builders<Client>.Filter.ElemMatch(x => x.Jobs, y => internalIds.Contains(y.InternalId));
        var combinedFilters = Builders<Client>.Filter.And(idFilter, internalIdsFilter);

        await _db.Collection.UpdateManyAsync(combinedFilters, updateDefinition);
    }
}

Answer 1

您可以使用过滤位置运算符来更新数组中与条件匹配的所有元素:

var internalIds = new[] { "1", "2" };
var idFilter = Builders<Client>.Filter.Eq(x => x.Id, objectId);
var updateDefinition = Builders<Client>.Update
    .Set("Jobs.$[job].FinishedAt", DateTime.UtcNow);

await collection.UpdateManyAsync(idFilter, updateDefinition,
     new UpdateOptions
     {
         ArrayFilters = new []
         {
             new BsonDocumentArrayFilterDefinition<BsonDocument>(new BsonDocument("job.groupName", new BsonDocument("$in", new BsonArray(internalIds)))),
         }
     });

查看此博客文章中的一些示例 - https://kevsoft.net/2020/03/23/updating-arrays-in-mongodb-with-csharp.html