IAggregateFluentExtensionsLookupTResult Method (IAggregateFluentTResult, IMongoCollectionBsonDocument, BsonDocument, PipelineDefinitionBsonDocument, BsonDocument, FieldDefinitionBsonDocument, IEnumerableBsonDocument) |
Appends a lookup stage to the pipeline.
Namespace:
MongoDB.Driver
Assembly:
MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.8.0+cc573f3e1f48f39162b4b680e921a623e127e8fa
Syntax public static IAggregateFluent<BsonDocument> Lookup<TResult>(
this IAggregateFluent<TResult> aggregate,
IMongoCollection<BsonDocument> foreignCollection,
BsonDocument let,
PipelineDefinition<BsonDocument, BsonDocument> lookupPipeline,
FieldDefinition<BsonDocument, IEnumerable<BsonDocument>> as
)
<ExtensionAttribute>
Public Shared Function Lookup(Of TResult) (
aggregate As IAggregateFluent(Of TResult),
foreignCollection As IMongoCollection(Of BsonDocument),
let As BsonDocument,
lookupPipeline As PipelineDefinition(Of BsonDocument, BsonDocument),
as As FieldDefinition(Of BsonDocument, IEnumerable(Of BsonDocument))
) As IAggregateFluent(Of BsonDocument)
[<ExtensionAttribute>]
static member Lookup :
aggregate : IAggregateFluent<'TResult> *
foreignCollection : IMongoCollection<BsonDocument> *
let : BsonDocument *
lookupPipeline : PipelineDefinition<BsonDocument, BsonDocument> *
as : FieldDefinition<BsonDocument, IEnumerable<BsonDocument>> -> IAggregateFluent<BsonDocument>
Parameters
- aggregate
- Type: MongoDB.DriverIAggregateFluentTResult
The aggregate. - foreignCollection
- Type: MongoDB.DriverIMongoCollectionBsonDocument
The foreign collection. - let
- Type: MongoDB.BsonBsonDocument
The "let" definition. - lookupPipeline
- Type: MongoDB.DriverPipelineDefinitionBsonDocument, BsonDocument
The lookup pipeline. - as
- Type: MongoDB.DriverFieldDefinitionBsonDocument, IEnumerableBsonDocument
The as field in the result in which to place the results of the lookup pipeline.
Type Parameters
- TResult
- The type of the result.
Return Value
Type:
IAggregateFluentBsonDocumentThe fluent aggregate interface.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type
IAggregateFluentTResult. When you use instance method syntax to call this method, omit the first parameter. For more information, see
Extension Methods (Visual Basic) or
Extension Methods (C# Programming Guide).
See Also