DeleteByQuery using NEST and ElasticSearch

Question

I'm having a little difficulty getting NEST's DeleteByQuery method to work.

Very simply the query never finds anything to delete, and I can't figure out why. I'm using the same query to return records (using Search) and everything works as expected.

    private void Delete(MyClass someObject)
    {
        var response = elasticClient.DeleteByQuery<MyClass>(q => q                
            .Match(m => m.OnField(f => f.Guid).Equals(someObject.Guid))            
            );
    }

I've only just started using NEST, so I'm sure this is a pretty simple problem and I'm just being a little dim!

Any help/suggestions much appreciated.

Mohsen Esmailpour · Accepted Answer · 2021-06-05 11:48:10Z

10

UPDATE NEST to version 6.4.0

var response = _client.DeleteByQuery<MyClass>(q => q
            .Query(rq => rq
                .Match(m => m
                .Field(f => f.Guid)
                .Query(guid.ToString())) 
            )
            .Index("Index_Name")
        );

edited Jun 5, 2021 at 11:48

Mohsen Esmailpour

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answered Nov 29, 2018 at 22:01

Anas Ouardirhi

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1 Comment

Ollie Beumkes Over a year ago

I thought I'd post the following adjustment to specify the index for good Abstraction practise; var response = _elasticClient.DeleteByQuery<DocumentData>(q => q .Query(rq => rq .Match(m => m .Field(f => f.DocumentID) .Query(documentID.ToString() )) ).Index(indexName) );

Martijn Laarman · Accepted Answer · 2014-01-31 13:56:36Z

9

The .Equals() is a .NET method on Object that checks for equality.

If you change the call to Equals() to Query(someObject.Guid) it should work.

answered Jan 31, 2014 at 13:56

Martijn Laarman

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2 Comments

Ben Over a year ago

Thanks for the reply. I must be missing something because I can't swap out the call to Equals() to Query(someObject.Guid). Any chance you could give a quick example clarifying what you mean?

Martijn Laarman Over a year ago

I think in the nuget version its still called QueryString()

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