How do I update an existing document inside ElasticSearch index using NEST?

Question

I am trying to update an existing indexed document. I have indexed tags, title and owners field. Now when the user changes the title, I need to find and update the document inside the index.

Should I update and replace the entire document or just the title field?

public void UpdateDoc(ElasticsearchDocument doc) {  Uri localhost = new Uri("http://localhost:9200");  var setting = new ConnectionSettings(localhost);  setting.SetDefaultIndex("movies");  var client = new ElasticClient(setting);   IUpdateResponse resp = client.Update<ElasticsearchDocument, IndexedDocument>(                                   d => d.Index("movies")                                         .Type(doc.Type)                                         .Id(doc.Id), doc); } 

It just doesn't work. The code above generates a syntax error. Does anyone know the correct way to do this using the C# NEST client of ElasticSearch?

Answer 1

I have successfully updated existing items in my Elasticsearch index with NEST using a method like the following. Note in this example, you only need to send a partial document with the fields that you wish to be updated.

    // Create partial document with a dynamic     dynamic updateDoc = new System.Dynamic.ExpandoObject();     updateDoc.Title = "My new title";      var response = client.Update<ElasticsearchDocument, object>(u => u         .Index("movies")         .Id(doc.Id)         .Document(updateDoc)      ); 

You can find more examples of ways to send updates in the NEST Update Unit Tests from the GitHub Source.