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IndexKeysDefinitionBuilderTDocumentGeoHaystack Method (ExpressionFuncTDocument, Object, ExpressionFuncTDocument, Object)

Note: This API is now obsolete.

Creates a geo haystack index key definition.

Namespace:  MongoDB.Driver
Assembly:  MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.16.0+eeafbea0921243a5868b81984e1083a07c1f75bc
Syntax
[ObsoleteAttribute("GeoHaystack indexes were deprecated in server version 4.4.")]
public IndexKeysDefinition<TDocument> GeoHaystack(
	Expression<Func<TDocument, Object>> field,
	Expression<Func<TDocument, Object>> additionalFieldName = null
)

Parameters

field
Type: System.Linq.ExpressionsExpressionFuncTDocument, Object
The field.
additionalFieldName (Optional)
Type: System.Linq.ExpressionsExpressionFuncTDocument, Object
Name of the additional field.

Return Value

Type: IndexKeysDefinitionTDocument
A geo haystack index key definition.
See Also