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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: 2.21.0+5a9c3311e158910b88195f290e6d4b1b2715d2b2
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
)

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: 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