case classGroupField(idField: String)(ops: (String, GroupFunction)*) extends PipelineOperator with Product with Serializable
Groups documents together to calulate aggregates on document collections. This command
aggregates on one field.
http://docs.mongodb.org/manual/reference/aggregation/group/#_S_group
idField
Name of the field to aggregate on.
ops
Sequence of operators specifying aggregate calculation.
Linear Supertypes
Serializable, Serializable, Product, Equals, PipelineOperator, AnyRef, Any
Groups documents together to calulate aggregates on document collections. This command aggregates on one field. http://docs.mongodb.org/manual/reference/aggregation/group/#_S_group
Name of the field to aggregate on.
Sequence of operators specifying aggregate calculation.