Elasticsearch .NET 8+ deserialization problem when elastic fields have specific names

[JamesPScottPharm3r]

If I have a field named: field_123 in an index, and I query that index with the .NET Elastic library (using GetAsync, SearchAsync etc.) any fields that end in this numeric type of format are not deserialized.

E.g.

PUT /test-index
{
"mappings": {
"dynamic": "strict",
"properties": {
"id": {
"type": "keyword"
},
"string_5": {
"type": "keyword"
}
}
}
}

POST /test-index/_doc/docone
{
"id": "docone",
"string_5": "this value for test"
}

Now using the Elastic client retrieve docone into a POCO that looks like this:

public class PocoExample {
public required string Id { get; set; }
public string? String5 { get; set;
}

You'll see that String5 is not Deserialized properly and is null.

Note that if the field name is "string_value5" it would be fine... its just when any field naming ends with numbers only... after _ or perhaps other characters.

[flobernd]

Hi @JamesPScottPharm3r , please have a look at the documentation about source serialization.