Azure Search CreateIndexAsync fails with CamelCase field names FieldBuilder - azure-search-.net-sdk

Question

Azure Search V11
I can't get this to work. But with the standard FieldBuilder the index is created.
private static async Task CreateIndexAsync(SearchIndexClient indexClient, string indexName, Type type)
{
var builder = new FieldBuilder
{
Serializer = new JsonObjectSerializer(new JsonSerializerOptions {PropertyNamingPolicy = new CamelCaseNamingPolicy()})
};
var searchFields = builder.Build(type).ToArray();
var definition = new SearchIndex(indexName, searchFields);
await indexClient.CreateIndexAsync(definition);
}
`
public class CamelCaseNamingPolicy : JsonNamingPolicy
{
public override string ConvertName(string name)
{
return char.ToLower(name[0]) + name.Substring(1);
}
}

Answer 1

See our sample for FieldBuilder. Basically, you must use a naming policy for both FieldBuilder and the SearchClient:
var clientOptions = new SearchClientOptions
{
Serializer = new JsonObjectSerializer(
new JsonSerializerOptions
{
PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
}),
};
var builder = new FieldBuilder
{
Serializer = clientOptions.Serializer,
};
var index = new SearchIndex("name")
{
Fields = builder.Build(type),
};
var indexClient = new SearchIndexClient(uri, clientOptions);
await indexClient.CreateIndexAsync(index);
await Task.DelayAsync(5000); // can take a little while
var searchClient = new SearchClient(uri, clientOptions);
var response = await searchClient.SearchAsync("whatever");
While this sample works (our sample code comes from oft-executed tests), if you have further troubles, please be sure to post the exact exception message you are getting.