So let's say I have the following code in C# using NEST:

    private ISearchResponse<Country> GetFilteredResultsByIds(ElasticClient client,
        Query query)
    {
        return client.Search<Country>(s => s
            .From(0)
            .Size(10)
            .Query(q => q
                .Nested(n => n
                    .Path(p => p.Customer)
                    .Query(q => q
                        .Term(t => t
                            .Field(f => f.Customer.CustomerId).Value(query.CustomerId)))
                ) && q
                .Nested(n => n
                    .Path(p => p.Person)
                    .Query(q => q
                        .Term(t => t
                            .Field(f => f.Person.ServiceId).Value(query.ServiceId))))));
    }

is it possible to outsource parts of the search query to external classes/parameters? For example the Customer and Person part to be able to reuse this in another query.

CodePudding user response：

You can extract those parts to static class and use as follow

client.Search<Country>(s => s
    .From(0)
    .Size(10)
    .Query(q => q.SearchCustomerId(customerId) && q.SearchServiceId(serviceId)));

Class with extracted parts

public static class Helpers
{
    public static QueryContainer SearchServiceId(this QueryContainerDescriptor<Country> container, string serviceId)
    {
        return container
            .Nested(n => n
                .Path(p => p.Person)
                .Query(q => q
                    .Term(t => t
                        .Field(f => f.Person.First().ServiceId).Value(serviceId))));
    }

    public static QueryContainer SearchCustomerId(this QueryContainerDescriptor<Country> container, string customerId)
    {
        return container
            .Nested(n => n
                .Path(p => p.Customer)
                .Query(q => q
                    .Term(t => t
                        .Field(f => f.Customer.First().CustomerId).Value(customerId))));
    }
}