Elasticsearch/Nest - Combining multiple range queries (OIC syntax) - elasticsearch

Question

ES newbie here (transitioning over from the SolrNet world, so I am looking for pointers with a similar syntax)
Can anyone help with formulating a query that might look something like the code snippet below without the lambdas. Unfortunately there are very few examples in the plain old OI syntax and I have been stuck....
How would I formulate a set of boolean range queries, in solrnet I would do something like this to obtain items that fall in a certain price band:
List<ISolrQuery> queryList = new List<ISolrQuery>();
double[] priceList = GetPrices(..) //double array
for (int i = 1; i <= 10; i++)
{
queryList.Add(new solr.Query(new SolrQueryByRange<double>("price", priceList[i] * 0.95, priceList[i] * 1.15));
}
var results = _solr.Query(new SolrMultipleCriteriaQuery(queryList), new QueryOptions
{
Rows = 50,
Fields = new[] { "Item", "Created", "Price" },
});
Could anyone help with equivalent Elasticsearch/Nest query?

Answer 1

Something like the following
void Main()
{
var client = new ElasticClient(connection: new InMemoryConnection());
// prices from your GetPrices method...
var prices = new[] { 1d, 2d };
var searchRequest = new SearchRequest<Document>("index", "document")
{
Fields = new List<Nest.PropertyPathMarker>{ "Item", "Created", "Price" },
Size = 50,
Query = new BoolQuery
{
Should = prices.Select(p => new RangeQuery
{
Field = "price",
GreaterThanOrEqualTo = (p * 0.95).ToString(),
LowerThanOrEqualTo = (p * 1.15).ToString()
}.ToContainer())
}.ToContainer()
};
var result = client.Search<Document>(searchRequest);
Console.WriteLine(Encoding.UTF8.GetString(result.RequestInformation.Request));
}
public class Document
{
public string Item { get; set; }
public DateTime Created { get; set;}
public double Price {get; set;}
}
This searches for"document" types in index "index" (strongly typed to your Document POCO), using a bool query and should clauses of ranges constructed from the prices - if a document's price field falls into any one of the ranges, it will be considered a match.
The resulting query DSL from the NEST query above is
{
"size": 50,
"fields": [
"Item",
"Created",
"Price"
],
"query": {
"bool": {
"should": [
{
"range": {
"price": {
"gte": "0.95",
"lte": "1.15"
}
}
},
{
"range": {
"price": {
"gte": "1.9",
"lte": "2.3"
}
}
}
]
}
}
}