CODEWITHSUNDEEP
c#elasticsearchmappingnest
JayJohnsonDesigns
JayJohnsonDesigns

Reputation: 33

Elasticsearch Nest C# -- ElasticProperty Analyzer causing dynamic mapping

I am using ElasticProperty attributes to define my index type mapping. This works:

[ElasticProperty(Boost = 2)]
public string Title { get; set; }
[ElasticProperty(Index = FieldIndexOption.NotAnalyzed)]
public string ActivityType { get; set; }

I create my index and everything looks good (I'm just copying the affected props):

        "properties": {
           "activityType": {
              "type": "string",
              "index": "not_analyzed"
           },
           "title": {
              "type": "string",
              "boost": 2
           }
        }

BUT, when I drop the mapping, change the Analyzer and reindex watch what happens:

[ElasticProperty(Boost = 2, Analyzer = "keyword")]
public string Title { get; set; }
[ElasticProperty(Index = FieldIndexOption.NotAnalyzed)]
public string ActivityType { get; set; }

Result:

       "properties": {
           "activityType": {
              "type": "string"
           },
           "title": {
              "type": "string"
           }
       }

Can someone explain what's happening here? It seems that adding the Analyzer parameter forces the mapping to be generated dynamically. Why?

Upvotes: 0

Views: 1338

Answers (1)

jhilden
jhilden

Reputation: 12429

Make sure that on your application startup you're calling the following:

private readonly IElasticClient _client;
//initialize _client
_client.Map<YourTypeHere>(m => m.MapFromAttributes());

That code will apply any new mapping that you have.

Upvotes: 1

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