PipelineDefinitionBuilderGraphLookupTInput, TIntermediate, TFrom Method (PipelineDefinitionTInput, TIntermediate, IMongoCollectionTFrom, FieldDefinitionTFrom, BsonValue, FieldDefinitionTFrom, BsonValue, AggregateExpressionDefinitionTIntermediate, BsonValue, FieldDefinitionBsonDocument, IEnumerableBsonDocument, FieldDefinitionBsonDocument, Int32) |
Appends a $graphLookup stage to the pipeline.
Namespace:
MongoDB.Driver
Assembly:
MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.22.0+75246110ed1247226fcc7f8eb2c54ffab745693e
Syntax public static PipelineDefinition<TInput, BsonDocument> GraphLookup<TInput, TIntermediate, TFrom>(
this PipelineDefinition<TInput, TIntermediate> pipeline,
IMongoCollection<TFrom> from,
FieldDefinition<TFrom, BsonValue> connectFromField,
FieldDefinition<TFrom, BsonValue> connectToField,
AggregateExpressionDefinition<TIntermediate, BsonValue> startWith,
FieldDefinition<BsonDocument, IEnumerable<BsonDocument>> as,
FieldDefinition<BsonDocument, int> depthField = null
)
<ExtensionAttribute>
Public Shared Function GraphLookup(Of TInput, TIntermediate, TFrom) (
pipeline As PipelineDefinition(Of TInput, TIntermediate),
from As IMongoCollection(Of TFrom),
connectFromField As FieldDefinition(Of TFrom, BsonValue),
connectToField As FieldDefinition(Of TFrom, BsonValue),
startWith As AggregateExpressionDefinition(Of TIntermediate, BsonValue),
as As FieldDefinition(Of BsonDocument, IEnumerable(Of BsonDocument)),
Optional depthField As FieldDefinition(Of BsonDocument, Integer) = Nothing
) As PipelineDefinition(Of TInput, BsonDocument)
[<ExtensionAttribute>]
static member GraphLookup :
pipeline : PipelineDefinition<'TInput, 'TIntermediate> *
from : IMongoCollection<'TFrom> *
connectFromField : FieldDefinition<'TFrom, BsonValue> *
connectToField : FieldDefinition<'TFrom, BsonValue> *
startWith : AggregateExpressionDefinition<'TIntermediate, BsonValue> *
as : FieldDefinition<BsonDocument, IEnumerable<BsonDocument>> *
?depthField : FieldDefinition<BsonDocument, int>
(* Defaults:
let _depthField = defaultArg depthField null
*)
-> PipelineDefinition<'TInput, BsonDocument>
Parameters
- pipeline
- Type: MongoDB.DriverPipelineDefinitionTInput, TIntermediate
The pipeline. - 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.DriverAggregateExpressionDefinitionTIntermediate, BsonValue
The start with value. - as
- Type: MongoDB.DriverFieldDefinitionBsonDocument, IEnumerableBsonDocument
The as field. - depthField (Optional)
- Type: MongoDB.DriverFieldDefinitionBsonDocument, Int32
The depth field.
Type Parameters
- TInput
- The type of the input documents.
- TIntermediate
- The type of the intermediate documents.
- TFrom
- The type of the from documents.
Return Value
Type:
PipelineDefinitionTInput,
BsonDocumentA new pipeline with an additional stage.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type
PipelineDefinitionTInput,
TIntermediate. 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