> For the complete documentation index, see [llms.txt](https://solr-express.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://solr-express.gitbook.io/docs/5.0.0/tutorials/facets/field.md).

# Facet field

## Feature

Create a facet field

## How to

1. Configure facet

```csharp
    DocumentCollection<TechProductDocument> documentCollection; // from DI

    var rersult = documentCollection
        .Select()
        .FacetField(q => q.InStock)
        .Execute();
```

1. Optionally, change one or more settings

```csharp
    DocumentCollection<TechProductDocument> documentCollection; // from DI

    var rersult = documentCollection
        .Select()
        .FacetField(q => q.InStock, facet =>
        {
            facet.Minimum = 3;
            facet.Limit = 5;
        })
        .Execute();
```

1. Read data

```csharp
    rersult
        .Facets(out var data);

    foreach (FacetItemField facetItem in data)
    {
        // facetName = "InStock"
        var facetName = facetItem.Name;
        //facetType = FacetType.Field
        var facetType = facetItem.FacetType;

        foreach (var facetItemValue in facetItem.Values)
        {
            // nested = nested facet (if configured)
            var nested = facetItemValue.Facets;
            // key = value of item's value
            var key = facetItemValue.Key;
            // quantity = quantity of item's value
            var quantity = facetItemValue.Quantity;
        }
    }
```

## Settings

| Use case                                     | How to                                                                           |
| -------------------------------------------- | -------------------------------------------------------------------------------- |
| Sort type of result of facet                 | .FacetField(q => q.InStock, facet => facet.SortType = FacetSortType.CountAsc)    |
| Minimum count of itens in facet's result     | .FacetField(q => q.InStock, facet => facet.Minimum = 2)                          |
| Limit of itens in facet's result             | .FacetField(q => q.InStock, facet => facet.Limit = 10)                           |
| List of tags to exclude in facet calculation | .FacetField(q => q.InStock, facet => facet.Excludes = new\[] { "tag1", "tag2" }) |