SetWindowFields constructor
SetWindowFields({})
Creates $setWindowFields
aggregation stage
partitionBy
Optional - Specifies an expression to group the documents. In the $setWindowFields stage, the group of documents is known as a partition. Default is one partition for the entire collection.sortBy
Required for some operators Specifies the field(s) to sort the documents by in the partition. Uses the same syntax as the $sort stage. Default is no sorting.output
- Specifies the field(s) an related parameters to append to the documents in the output returned by the $setWindowFields stage. Each field is set to the result returned by the window operator. The field can either an Output object, a list of Output Objects or a document containing the explicit description of the output required
Implementation
SetWindowFields({
partitionBy,
Map<String, int>? sortBy,
defaultId,
required dynamic output,
}) : super(
stSetWindowFields,
AEObject({
if (partitionBy != null) spPartitionBy: partitionBy,
if (sortBy != null) spSortBy: AEObject(sortBy),
'output': _getOutputDocument(output),
}));