FilterDefinitionBuilderTDocumentExists Method (ExpressionFuncTDocument, Object, Boolean) |
Creates an exists filter.
Namespace:
MongoDB.Driver
Assembly:
MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.11.0+cb27a82ea70620ad1acad8058809be8302ae4f2a
Syntax public FilterDefinition<TDocument> Exists(
Expression<Func<TDocument, Object>> field,
bool exists = true
)
Public Function Exists (
field As Expression(Of Func(Of TDocument, Object)),
Optional exists As Boolean = true
) As FilterDefinition(Of TDocument)
member Exists :
field : Expression<Func<'TDocument, Object>> *
?exists : bool
(* Defaults:
let _exists = defaultArg exists true
*)
-> FilterDefinition<'TDocument>
Parameters
- field
- Type: System.Linq.ExpressionsExpressionFuncTDocument, Object
The field. - exists (Optional)
- Type: SystemBoolean
if set to true [exists].
Return Value
Type:
FilterDefinitionTDocumentAn exists filter.
See Also