aggregate_max

The aggregate_max (str agg_name, str fieldname) returns the max of the field "fieldname" over all documents that passed the relevant filtering.

The aggregation result will be stored under the query results objects, under a key named "agg_name".

Input

• agg_name(str) - Specifies the key that will be used to store the aggregation result under the query result.

• fieldname(str) - The name of the field to aggregate. params[fieldname]must be of type float or int.

Example:

def score_function_recommendation( params, V):
      score1 = 0.0 
      if match('genres'): 
         aggregate_max ("min_budget_genres", "rating")      
         if match('languages'):
             aggregate_max ("min_budget", "rating")
         score1 += rarity_sum('genres')
     return score1 

In the above example, the query results will include a key name 'aggregations', containing the following sub keys:

• "max_budget_genres" - the maximum of the field “budget” over all candidates that passed the filter over genres.

• "max_budget" - the maximum of the field “budget” over all candidates that passed the filters over genres and languages.