IAggregateFluentExtensionsGraphLookupTResult, TFrom Method (IAggregateFluentTResult, IMongoCollectionTFrom, FieldDefinitionTFrom, BsonValue, FieldDefinitionTFrom, BsonValue, AggregateExpressionDefinitionTResult, BsonValue, FieldDefinitionBsonDocument, IEnumerableBsonDocument, FieldDefinitionBsonDocument, Int32) |
Appends a $graphLookup stage to the pipeline.
Namespace:
MongoDB.Driver
Assembly:
MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.8.0+cc573f3e1f48f39162b4b680e921a623e127e8fa
Syntax public static IAggregateFluent<BsonDocument> GraphLookup<TResult, TFrom>(
this IAggregateFluent<TResult> aggregate,
IMongoCollection<TFrom> from,
FieldDefinition<TFrom, BsonValue> connectFromField,
FieldDefinition<TFrom, BsonValue> connectToField,
AggregateExpressionDefinition<TResult, BsonValue> startWith,
FieldDefinition<BsonDocument, IEnumerable<BsonDocument>> as,
FieldDefinition<BsonDocument, int> depthField = null
)
<ExtensionAttribute>
Public Shared Function GraphLookup(Of TResult, TFrom) (
aggregate As IAggregateFluent(Of TResult),
from As IMongoCollection(Of TFrom),
connectFromField As FieldDefinition(Of TFrom, BsonValue),
connectToField As FieldDefinition(Of TFrom, BsonValue),
startWith As AggregateExpressionDefinition(Of TResult, BsonValue),
as As FieldDefinition(Of BsonDocument, IEnumerable(Of BsonDocument)),
Optional depthField As FieldDefinition(Of BsonDocument, Integer) = Nothing
) As IAggregateFluent(Of BsonDocument)
[<ExtensionAttribute>]
static member GraphLookup :
aggregate : IAggregateFluent<'TResult> *
from : IMongoCollection<'TFrom> *
connectFromField : FieldDefinition<'TFrom, BsonValue> *
connectToField : FieldDefinition<'TFrom, BsonValue> *
startWith : AggregateExpressionDefinition<'TResult, BsonValue> *
as : FieldDefinition<BsonDocument, IEnumerable<BsonDocument>> *
?depthField : FieldDefinition<BsonDocument, int>
(* Defaults:
let _depthField = defaultArg depthField null
*)
-> IAggregateFluent<BsonDocument>
Parameters
- aggregate
- Type: MongoDB.DriverIAggregateFluentTResult
The aggregate. - from
- Type: MongoDB.DriverIMongoCollectionTFrom
The from collection. - connectFromField
- Type: MongoDB.DriverFieldDefinitionTFrom, BsonValue
The connect from field. - connectToField
- Type: MongoDB.DriverFieldDefinitionTFrom, BsonValue
The connect to field. - startWith
- Type: MongoDB.DriverAggregateExpressionDefinitionTResult, BsonValue
The start with value. - as
- Type: MongoDB.DriverFieldDefinitionBsonDocument, IEnumerableBsonDocument
The as field. - depthField (Optional)
- Type: MongoDB.DriverFieldDefinitionBsonDocument, Int32
The depth field.
Type Parameters
- TResult
- The type of the result.
- TFrom
- The type of the from documents.
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