IndexKeysDefinitionBuilderTDocumentGeoHaystack Method (FieldDefinitionTDocument, FieldDefinitionTDocument) | 
 Note: This API is now obsolete.
            Creates a geo haystack index key definition.
            
 
    Namespace: 
   MongoDB.Driver
    Assembly:
   MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.19.1+3a2a09dd959482f665ffbb5df2557ec541597af4
Syntax[ObsoleteAttribute("GeoHaystack indexes were deprecated in server version 4.4.")]
public IndexKeysDefinition<TDocument> GeoHaystack(
	FieldDefinition<TDocument> field,
	FieldDefinition<TDocument> additionalFieldName = null
)<ObsoleteAttribute("GeoHaystack indexes were deprecated in server version 4.4.")>
Public Function GeoHaystack ( 
	field As FieldDefinition(Of TDocument),
	Optional additionalFieldName As FieldDefinition(Of TDocument) = Nothing
) As IndexKeysDefinition(Of TDocument)[<ObsoleteAttribute("GeoHaystack indexes were deprecated in server version 4.4.")>]
member GeoHaystack : 
        field : FieldDefinition<'TDocument> * 
        ?additionalFieldName : FieldDefinition<'TDocument> 
(* Defaults:
        let _additionalFieldName = defaultArg additionalFieldName null
*)
-> IndexKeysDefinition<'TDocument> 
Parameters
- field
 - Type: MongoDB.DriverFieldDefinitionTDocument
The field. - additionalFieldName (Optional)
 - Type: MongoDB.DriverFieldDefinitionTDocument
Name of the additional field. 
Return Value
Type: 
IndexKeysDefinitionTDocument
            A geo haystack index key definition.
            
See Also