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如何检查作者是否存在于嵌套数组中。 我的模型看起来是这样的:C#官方MongoDB连接器 - 检查用户是否已经喜欢发布
public class Likes
{
// - Id is equal to article ID
[Required]
public ObjectId Id { get; set; }
[Required]
public Like[] likes { get; set; }
}
public class Like
{
[Required]
public string author { get; set; }
public DateTime timestamp { get; set; }
}
在BSON格式如下:
{
"_id" : ObjectId("5733d90aa75c955354bc2057"),
"likes" : [
{
"author" : "[email protected]",
"timestamp" : ISODate("2016-05-12T12:27:02.315Z")
},
{
"author" : "[email protected]",
"timestamp" : ISODate("2016-05-12T12:27:03.610Z")
},
{
"author" : "[email protected]",
"timestamp" : ISODate("2016-05-12T12:27:04.185Z")
}
]
}
正如你看到的。同一个人可以喜欢同一篇文章。我怎样才能检查,例如[email protected]是否存在于某个帖子的喜好列表中?