IAggregateFluentExtensionsGraphLookupTResult, TFrom, TConnectFrom, TConnectTo, TStartWith, TAsElement, TAs, TNewResult Method (IAggregateFluentTResult, IMongoCollectionTFrom, ExpressionFuncTFrom, TConnectFrom, ExpressionFuncTFrom, TConnectTo, ExpressionFuncTResult, TStartWith, ExpressionFuncTNewResult, TAs, ExpressionFuncTAsElement, Int32, AggregateGraphLookupOptionsTFrom, TAsElement, TNewResult) (original) (raw)
Appends a $graphLookup stage to the pipeline.
Namespace: MongoDB.Driver
Assembly: MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.10.0+569905ff5e778c38ea19d9d0392496a83e1704ed
Syntax
public static IAggregateFluent GraphLookup<TResult, TFrom, TConnectFrom, TConnectTo, TStartWith, TAsElement, TAs, TNewResult>( this IAggregateFluent aggregate, IMongoCollection from, Expression<Func<TFrom, TConnectFrom>> connectFromField, Expression<Func<TFrom, TConnectTo>> connectToField, Expression<Func<TResult, TStartWith>> startWith, Expression<Func<TNewResult, TAs>> as, Expression<Func<TAsElement, int>> depthField, AggregateGraphLookupOptions<TFrom, TAsElement, TNewResult> options = null ) where TAs : Object, IEnumerable
Public Shared Function GraphLookup(Of TResult, TFrom, TConnectFrom, TConnectTo, TStartWith, TAsElement, TAs As {Object, IEnumerable(Of TAsElement)}, TNewResult) ( aggregate As IAggregateFluent(Of TResult), from As IMongoCollection(Of TFrom), connectFromField As Expression(Of Func(Of TFrom, TConnectFrom)), connectToField As Expression(Of Func(Of TFrom, TConnectTo)), startWith As Expression(Of Func(Of TResult, TStartWith)), as As Expression(Of Func(Of TNewResult, TAs)), depthField As Expression(Of Func(Of TAsElement, Integer)), Optional options As AggregateGraphLookupOptions(Of TFrom, TAsElement, TNewResult) = Nothing ) As IAggregateFluent(Of TNewResult)[] static member GraphLookup : aggregate : IAggregateFluent<'TResult> * from : IMongoCollection<'TFrom> * connectFromField : Expression<Func<'TFrom, 'TConnectFrom>> * connectToField : Expression<Func<'TFrom, 'TConnectTo>> * startWith : Expression<Func<'TResult, 'TStartWith>> * as : Expression<Func<'TNewResult, 'TAs>> * depthField : Expression<Func<'TAsElement, int>> * ?options : AggregateGraphLookupOptions<'TFrom, 'TAsElement, 'TNewResult> (* Defaults: let _options = defaultArg options null *) -> IAggregateFluent<'TNewResult> when 'TAs : Object and IEnumerable<'TAsElement>
Parameters
aggregate
Type: MongoDB.DriverIAggregateFluentTResult
The aggregate.
from
Type: MongoDB.DriverIMongoCollectionTFrom
The from collection.
connectFromField
Type: System.Linq.ExpressionsExpressionFuncTFrom, TConnectFrom
The connect from field.
connectToField
Type: System.Linq.ExpressionsExpressionFuncTFrom, TConnectTo
The connect to field.
startWith
Type: System.Linq.ExpressionsExpressionFuncTResult, TStartWith
The start with value.
as
Type: System.Linq.ExpressionsExpressionFuncTNewResult, TAs
The as field.
depthField
Type: System.Linq.ExpressionsExpressionFuncTAsElement, Int32
The depth field.
options (Optional)
Type: MongoDB.DriverAggregateGraphLookupOptionsTFrom, TAsElement, TNewResult
The options.
Type Parameters
TResult
The type of the result.
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: IAggregateFluentTNewResult
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