IAggregateFluentExtensionsLookupTResult Method (IAggregateFluentTResult, IMongoCollectionBsonDocument, BsonDocument, PipelineDefinitionBsonDocument, BsonDocument, FieldDefinitionBsonDocument, IEnumerableBsonDocument) (original) (raw)
Appends a lookup stage to the pipeline.
Namespace: MongoDB.Driver
Assembly: MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.10.0+569905ff5e778c38ea19d9d0392496a83e1704ed
Syntax
public static IAggregateFluent Lookup( this IAggregateFluent aggregate, IMongoCollection foreignCollection, BsonDocument let, PipelineDefinition<BsonDocument, BsonDocument> lookupPipeline, FieldDefinition<BsonDocument, IEnumerable> as )
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)[] static member Lookup : aggregate : IAggregateFluent<'TResult> * foreignCollection : IMongoCollection * let : BsonDocument * lookupPipeline : PipelineDefinition<BsonDocument, BsonDocument> * as : FieldDefinition<BsonDocument, IEnumerable> -> IAggregateFluent
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: IAggregateFluentBsonDocument
The 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