How can I specify the index name using attribute using NEST for ElasticSearch?
Here is the POCO class I used:
[Serializable]
[ElasticsearchType(IdProperty = "msgid")]
public class Message
{
[PropertyName("msgid")]
public string Id { get; set; }
[PropertyName("date")]
public string Date { get; set; }
}
You can't specify the index name(s) for a specific POCO type using attributes. You can however specify it on ConnectionSettings using .DefaultMappingFor<T>, where T is your POCO type.
When using BulkAll, you can specify an index name per bulk operation using BufferToBulk(...)
private static void Main()
{
var defaultIndex = "my-index";
var pool = new SingleNodeConnectionPool(new Uri("http://localhost:9200"));
var settings = new ConnectionSettings(pool)
.DefaultIndex(defaultIndex);
var client = new ElasticClient(settings);
var bulkAll = client.BulkAll(MyDocuments(), b => b
.Index(null)
.Type(null)
.BufferToBulk((bu, docs) =>
{
foreach (var doc in docs)
{
bu.Index<MyDocument>(bi => bi
.Index(doc.Id % 2 == 0 ? "even-index" : "odd-index")
.Document(doc)
);
}
})
.RefreshOnCompleted()
.Size(100)
);
bulkAll.Wait(TimeSpan.FromMinutes(20), _ => {});
}
private static IEnumerable<MyDocument> MyDocuments()
{
for (int i = 0; i < 1000; i++)
yield return new MyDocument(i);
}
public class MyDocument
{
public MyDocument(int id)
{
Id = id;
Message = $"message {id}";
}
public int Id { get; set; }
public string Message { get; set; }
}
BulkAll, you can use BufferToBulk(..) to control the bulk operation for each item, including setting an index nameBufferToBulk I got this error Index name is null for the given type and no default index is set. Map an index name using ConnectionSettings.DefaultMappingFor<TDocument>() or set a default index using ConnectionSettings.DefaultIndex(). I don't get this error if I use the IndexMany directly without the BulkAll. Here is how I set the index : desc.Index("dev-testindex");