/// <summary>
/// Creates a nested aggregation. Wraps the aggregation on which it is called by a new Terms aggregation, using the provided fieldName.
/// </summary>
public static AggregationContainerDescriptor <T> GroupBy <T>(this AggregationContainerDescriptor <T> innerAggregation, string fieldName) where T : class
{
var v = new AggregationContainerDescriptor <T>();
v.Terms(fieldName, tr =>
{
var trmAggDescriptor = new TermsAggregationDescriptor <T>();
trmAggDescriptor.Field(fieldName);
trmAggDescriptor.Size(int.MaxValue);
return(trmAggDescriptor.Aggregations(x => innerAggregation));
});
return(v);
}
public static AggregationDescriptor <T> GroupBy <T>(this AggregationDescriptor <T> innerAggregation, String key) where T : class
{
AggregationDescriptor <T> v = new AggregationDescriptor <T>();
v.Terms(key, tr =>
{
TermsAggregationDescriptor <T> trmAggDescriptor = new TermsAggregationDescriptor <T>();
trmAggDescriptor.Field(key);
trmAggDescriptor.Size(int.MaxValue);
return(trmAggDescriptor.Aggregations(x => innerAggregation));
});
return(v);
}
/// <summary>
/// Creates a nested aggregation. Wraps the aggregation on which it is called by a new Terms aggregation, using the provided fieldGetter function to terms on the field.
/// </summary>
public static AggregationContainerDescriptor <T> GroupBy <T>(this AggregationContainerDescriptor <T> innerAggregation, Expression <Func <T, object> > fieldGetter) where T : class
{
var fieldName = fieldGetter.GetAggName(AggType.GroupBy);
var v = new AggregationContainerDescriptor <T>();
v.Terms(fieldName, tr =>
{
var trmAggDescriptor = new TermsAggregationDescriptor <T>();
trmAggDescriptor.Field(fieldGetter);
trmAggDescriptor.Size(int.MaxValue);
return(trmAggDescriptor.Aggregations(x => innerAggregation));
});
return(v);
}
