Elasticsearch NEST API，搜索多个索引

Question

If one is seraching several indexes at the same time, is there any way to say that if searching index A, then add this filter and if searching index B then add a different filter.

For example:

var filters = new List<Func<QueryContainerDescriptor<PropertySearchResult>, QueryContainer>>();
filters.Add(fq => fq.Term(t => t.Field(f => f.PromoterId).Value(user.Id)));
filters.Add(fq => fq.Term(t => t.Field(f => f.SubscriptionId).Value(subscriptionId)));
string indicies = String.Join(",", Utils.SupportedCountries.Select(c => c.Key.ToLower()).ToArray());
var result = await ElasticSearchConfig.GetClient().DeleteByQueryAsync<PropertySearchResult>(u => u
               .Index(indicies)
               .Query(q => q
               .Bool(bq => bq.Filter(filters))));

at the moment, all indices will be subject to the same filters but I would like to vary the filters based on which index is being searched.

Answer 1

Add(with &&) a term query to each of your filters

.Term("_index", A)

Check this link https://www.elastic.co/guide/en/elasticsearch/reference/current/mapping-index-field.html