solr express
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Facet query

Feature

Create a facet query

How to

  1. 1.
    Configure facet
DocumentCollection<TechProductDocument> documentCollection; // from DI
var rersult = documentCollection
.Select()
.FacetQuery("AliasName", q => q.Field(f => f.Features))
.Execute();
  1. 1.
    Optionally, change one or more settings
DocumentCollection<TechProductDocument> documentCollection; // from DI
var rersult = documentCollection
.Select()
.FacetQuery("AliasName", q => q.Field(f => f.Features), facet =>
{
facet.Minimum = 3;
facet.Limit = 5;
})
.Execute();
  1. 1.
    Read data
rersult
.Facets(out var data);
foreach (FacetItemField facetItem in data)
{
// facetName = "InStock" or some alias (if configured)
var facetName = facetItem.Name;
//facetType = FacetType.Field
var facetType = facetItem.FacetType;
foreach (FacetItemQuery facetItem in data)
{
// facetName = "AliasName"
var facetName = facetItem.Name;
//facetType = FacetType.Query
var facetType = facetItem.FacetType;
// nested = nested facet (if configured)
var nested = facetItem.Facets;
// quantity = quantity of item's value
var quantity = facetItem.Quantity;
}
}

Settings

Use case
How to
Sort type of result of facet
.FacetQuery("AliasName", q => q.Field(f => f.Features), facet => facet.SortType(FacetSortType.CountAsc))
Minimum count of itens in facet's result
.FacetQuery("AliasName", q => q.Field(f => f.Features), facet => facet.Minimum(2))
Limit of itens in facet's result
.FacetQuery("AliasName", q => q.Field(f => f.Features), facet => facet.Limit(10))
List of tags to exclude in facet calculation
.FacetQuery("AliasName", q => q.Field(f => f.Features), facet => facet.Excludes(new[] { "tag1", "tag2" }))
Specify a filter or list of filters to be intersected with the incoming domain before faceting
.FacetQuery("AliasName", q => q.Field(f => f.Features), facet => facet.Filter(f => f.Field(q => q.Id).EqualsTo(10)))

NOTE

Learn more about queries