[英]Serialize mongodb document to domain object
I'm trying to read a mondodb document into my domain class ( Company
) but get an error on one of the properties. 我正在尝试将mondodb文档读入我的域类(
Company
),但其中一个属性出现错误。 The error message reads: 错误消息显示为:
"Expected a nested document representing the serialized form of a OrgNumber value, but found a value of type String instead"
“期望一个嵌套的文档表示一个OrgNumber值的序列化形式,但是却找到了String类型的值”
The objects looks like this: 对象看起来像这样:
public class OrgNumber
{
public string Value { get; private set; }
...
private OrgNumber() { }
public OrgNumber(string value) {
Value = value;
}
}
public class Company
{
public string Name { get; private set; }
public OrgNumber OrgNumber { get; private set; }
...
private Company() { }
public Company(string name, OrgNumber orgNumber)
{
Name = name;
OrgNumber = orgNumber;
}
}
The mongodb document looks like this: mongodb文档如下所示:
{
"name": "Company name",
"orgNumber": "1234-5678",
}
I'm reading the document and mapping it directly into my domain model: 我正在阅读文档,并将其直接映射到我的域模型中:
var collection = _mongoDb.GetCollection<Company>("Companies");
var result = await collection.Find(c => c.CompanyId == companyId).SingleOrDefaultAsync();
How do I correctly get the string representation of OrgNumber
to the correct type OrgNumber
? 如何将
OrgNumber
的字符串表示形式正确获取为正确的类型OrgNumber
?
You can create your own serializer inheriting from SerializerBase<T>
您可以创建继承自
SerializerBase<T>
自己的序列SerializerBase<T>
public class OrgNumberSerializer : SerializerBase<OrgNumber>
{
public override OrgNumber Deserialize(BsonDeserializationContext context, BsonDeserializationArgs args)
{
var serializer = BsonSerializer.LookupSerializer(typeof(string));
var data = serializer.Deserialize(context, args);
return new OrgNumber(data.ToString());
}
public override void Serialize(BsonSerializationContext context, BsonSerializationArgs args, OrgNumber value)
{
var serializer = BsonSerializer.LookupSerializer(typeof(string));
serializer.Serialize(context, value.Value);
}
}
Then it needs to be registered globally using below line: 然后,需要使用以下代码行进行全局注册:
BsonSerializer.RegisterSerializer(typeof(OrgNumber), new OrgNumberSerializer());
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