Serializing ReadItemAsync() response based on a property of the document

Question

I need to serialize the response from ReadItemAsync() based on a property of the document stored in Azure Cosmos DB.

So if document.type = "dog", I need to serialize as ReadItemAsync<Dog>() and so on.

I don't know the type before retrieving it.

What's a good solution for this?

Answer 1

You could deserialize it to a JObject and read the type property before mapping it to a specific class.

var response = await container.ReadItemAsync<JObject>("myId", new("myPk"));

if (response.Resource.Value<string>("type") == "dog")
{
    var dog = response.Resource.ToObject<Dog>();
}