How to filter with a nested document based on multiple terms? - nest

Question

I am trying to replicate this DSL query in NEST. Basically a structured filter that will return all of the products that have the color red.
{
"query": {
"bool": {
"filter": [
{
"nested": {
"path": "keywordFacets",
"query": {
"bool": {
"filter": [
{ "term": { "keywordFacets.name": "color" } },
{ "term": { "keywordFacets.value": "Red" } }
]
}
}
}
}
]
}
}
}
Here is the POCO with attribute mapping.
[ElasticsearchType]
public class Product
{
[Keyword]
public long ProductId { get; set; }
[Nested]
public List<KeywordFacet> KeywordFacets { get; set; }
// other properties...
}
[ElasticsearchType]
public class KeywordFacet
{
[Keyword]
public string Name { get; set; }
[Keyword]
public string Value { get; set; }
}
I can't figure out how to get the two terms inside the nested filter array. This is my failed attempt so far:
var searchRequest = new SearchDescriptor<Product>()
.Query(q => q
.Bool(b => b
.Filter(bf => bf
.Nested(nq => nq
.Path(nqp => nqp.KeywordFacets)
.Query(qq => qq
.Bool(bb => bb
.Filter(ff => ff
.Term(t => t
.Field(p => p.KeywordFacets.First().Name)
.Value("color")
.Field(p2 => p2.KeywordFacets.First().Value).Value("Red")))))))));
Here is some sample data that is returned when I run the DSL query in Postman:
{
"productId": 183150,
"keywordFacets": [
{
"name": "color",
"value": "Red"
},
{
"name": "color",
"value": "Blue"
},
{
"name": "color",
"value": "Grey"
}
]
}

Answer 1

Here's the proper syntax after fumbling around for a while.
var searchRequest = new SearchDescriptor<Product>()
.Query(q => q
.Bool(b => b
.Filter(bf => bf
.Nested(nq => nq
.Path(nqp => nqp.KeywordFacets)
.Query(qq => qq.Bool(bb => bb
.Filter(ff => ff
.Term(t => t
.Field(p => p.KeywordFacets[0].Name).Value("color"))))
&& qq.Bool(bb => bb
.Filter(ff => ff
.Term(t => t
.Field(p2 => p2.KeywordFacets[0].Value).Value("Red"))))
)
)
)
)
);