NEST Conditional filter query with multiple terms

Question

I would like to do a ElasticSearch query like this:

{
    \"query\" :
    {
        \"bool\" :
        {
            \"filter\" : [
                {
                


        

Answer 1

You can create a list of filters before you make a query if you want to check conditional filters as shown below:

var nameList = new[] {"a", "b"};
var colorList = new[] {1, 2};

var filters = new List, QueryContainer>>();
if (nameList.Any())
{
     filters.Add(fq=> fq.Terms(t => t.Field(f => f.Name).Terms(nameList)));
}

if (colorList.Any())
{
    filters.Add(fq => fq.Terms(t => t.Field(f => f.Color).Terms(colorList)));
}

ISearchResponse searchResponse =
     elasticClient.Search(x => x.Query(q => q
     .Bool(bq => bq.Filter(filters))));

If you don't need to check any condition before making filter query then you can have something like that:

ISearchResponse searchResponse =
elasticClient.Search(x => x.Query(q => q
.Bool(bq => bq
.Filter(
        fq => fq.Terms(t => t.Field(f => f.Name).Terms(nameList)),
        fq => fq.Terms(t => t.Field(f => f.Color).Terms(colorList))
        ))));