Elastic Search Update API by script in NEST 6.5.4 for .NET - elasticsearch

Question

I am using Nest 6.5.4. I am not able to perform Update with script on a particular document in an index.
I have tried many ways but I am getting a syntax error.
My query is as follows.
var clientProvider = new ElasticClientProvider();
var projectModel = new ProjectModel();
var res = clientProvider.Client.Update<ProjectModel>(projectModel, i => i
.Index("attachment_index")
.Type("attachments")
.Id(projectId)
.Script(script=>script.Source("ctx._source.fileInfo.fileViewCount= ctx._source.fileInfo.fileViewCount + 1"))
);
It is throwing an error "Update Descriptor does not have a definition for Id"
The same query is working when tried in Kibana
POST attachment_index/attachments/1/_update
{
"script": {
"source":"ctx._source.fileInfo.fileViewCount += 1"
}
}
I dont know where I am getting error.

Answer 1

client.UpdateAsync<ProjectModel, object>(
new DocumentPath<ProjectModel>(id),
u => u
.Index(ConfigurationManager.AppSettings.Get("indexname"))
.Type(ConfigurationManager.AppSettings.Get("indextype"))
.Doc(ProjectModel)
.DocAsUpsert()
.Refresh(Elasticsearch.Net.Refresh.True));
This will work and let me know if you are still facing any issues.

Answer 2

There is no .Id() method on UpdateDescriptor<T, TPartial> because an id is a required parameter for an Update API call, so this constraint is enforced through the constructors.
The first parameter to .Update<T>(...) is a DocumentPath<T> from which an index, type and id can be derived for the update API call. If the ProjectModel CLR POCO has an Id property with a value, this will be used for Id of the call. For example
public class ProjectModel
{
public int Id { get; set; }
}
var client = new ElasticClient();
var projectModel = new ProjectModel { Id = 1 };
var updateResponse = client.Update<ProjectModel>(projectModel, i => i
.Index("attachment_index")
.Type("attachments")
.Script(script => script
.Source("ctx._source.fileInfo.fileViewCount= ctx._source.fileInfo.fileViewCount + 1"))
);
which results in
POST http://localhost:9200/attachment_index/attachments/1/_update
{
"script": {
"source": "ctx._source.fileInfo.fileViewCount= ctx._source.fileInfo.fileViewCount + 1"
}
}
If you want to explicitly specify the Id, you can pass the value for DocumentPath<T>
var updateResponse = client.Update<ProjectModel>(1, i => i
.Index("attachment_index")
.Type("attachments")
.Script(script => script
.Source("ctx._source.fileInfo.fileViewCount= ctx._source.fileInfo.fileViewCount + 1"))
);