IAggregateFluent<TResult>.GraphLookup<TFrom, TConnectFrom, TConnectTo, TStartWith, TAsElement, TAs, TNewResult> Method |
Appends a $graphLookup stage to the pipeline.
Namespace:
MongoDB.Driver
Assembly:
MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.21.0+5a9c3311e158910b88195f290e6d4b1b2715d2b2
SyntaxIAggregateFluent<TNewResult> GraphLookup<TFrom, TConnectFrom, TConnectTo, TStartWith, TAsElement, TAs, TNewResult>(
IMongoCollection<TFrom> from,
FieldDefinition<TFrom, TConnectFrom> connectFromField,
FieldDefinition<TFrom, TConnectTo> connectToField,
AggregateExpressionDefinition<TResult, TStartWith> startWith,
FieldDefinition<TNewResult, TAs> as,
FieldDefinition<TAsElement, int> depthField,
AggregateGraphLookupOptions<TFrom, TAsElement, TNewResult> options = null
)
where TAs : Object, IEnumerable<TAsElement>
Function GraphLookup(Of TFrom, TConnectFrom, TConnectTo, TStartWith, TAsElement, TAs As {Object, IEnumerable(Of TAsElement)}, TNewResult) (
from As IMongoCollection(Of TFrom),
connectFromField As FieldDefinition(Of TFrom, TConnectFrom),
connectToField As FieldDefinition(Of TFrom, TConnectTo),
startWith As AggregateExpressionDefinition(Of TResult, TStartWith),
as As FieldDefinition(Of TNewResult, TAs),
depthField As FieldDefinition(Of TAsElement, Integer),
Optional options As AggregateGraphLookupOptions(Of TFrom, TAsElement, TNewResult) = Nothing
) As IAggregateFluent(Of TNewResult)
abstract GraphLookup :
from : IMongoCollection<'TFrom> *
connectFromField : FieldDefinition<'TFrom, 'TConnectFrom> *
connectToField : FieldDefinition<'TFrom, 'TConnectTo> *
startWith : AggregateExpressionDefinition<'TResult, 'TStartWith> *
as : FieldDefinition<'TNewResult, 'TAs> *
depthField : FieldDefinition<'TAsElement, int> *
?options : AggregateGraphLookupOptions<'TFrom, 'TAsElement, 'TNewResult>
(* Defaults:
let _options = defaultArg options null
*)
-> IAggregateFluent<'TNewResult> when 'TAs : Object and IEnumerable<'TAsElement>
Parameters
- from
- Type: MongoDB.Driver.IMongoCollection<TFrom>
The from collection. - connectFromField
- Type: MongoDB.Driver.FieldDefinition<TFrom, TConnectFrom>
The connect from field. - connectToField
- Type: MongoDB.Driver.FieldDefinition<TFrom, TConnectTo>
The connect to field. - startWith
- Type: MongoDB.Driver.AggregateExpressionDefinition<TResult, TStartWith>
The start with value. - as
- Type: MongoDB.Driver.FieldDefinition<TNewResult, TAs>
The as field. - depthField
- Type: MongoDB.Driver.FieldDefinition<TAsElement, Int32>
The depth field. - options (Optional)
- Type: MongoDB.Driver.AggregateGraphLookupOptions<TFrom, TAsElement, TNewResult>
The options.
Type Parameters
- TFrom
- The type of the from documents.
- TConnectFrom
- The type of the connect from field (must be either TConnectTo or a type that implements IEnumerable{TConnectTo}).
- TConnectTo
- The type of the connect to field.
- TStartWith
- The type of the start with expression (must be either TConnectTo or a type that implements IEnumerable{TConnectTo}).
- TAsElement
- The type of the as field elements.
- TAs
- The type of the as field.
- TNewResult
- The type of the new result (must be same as TResult with an additional as field).
Return Value
Type:
IAggregateFluent<TNewResult>The fluent aggregate interface.
See Also