SearchDefinitionBuilderTDocumentExistsTField Method (ExpressionFuncTDocument, TField)

Creates a search definition that tests if a path to a specified indexed field name exists in a document.

Namespace: MongoDB.Driver.Search
Assembly: MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.21.0+5a9c3311e158910b88195f290e6d4b1b2715d2b2

Syntax

public SearchDefinition<TDocument> Exists<TField>(
	Expression<Func<TDocument, TField>> path
)

Public Function Exists(Of TField) ( 
	path As Expression(Of Func(Of TDocument, TField))
) As SearchDefinition(Of TDocument)

member Exists : 
        path : Expression<Func<'TDocument, 'TField>> -> SearchDefinition<'TDocument>

path: Type: System.Linq.ExpressionsExpressionFuncTDocument, TField
The field to test for.

Type: SearchDefinitionTDocument
An existence search definition.