Class: CohortScope::BigCohort

Inherits:
Cohort
  • Object
show all
Defined in:
lib/cohort_scope/big_cohort.rb

Constant Summary

Constants inherited from Cohort

Cohort::IMPOSSIBLE_CONDITION

Class Method Summary collapse

Methods inherited from Cohort

#+, #__getobj__, #__setobj__, #active_record, #any?, #as_json, create, #impossible!, #impossible?, #initialize, #inspect, #none?, #to_json, #where_value_nodes

Constructor Details

This class inherits a constructor from CohortScope::Cohort

Class Method Details

.reduce_constraints(active_record, constraints) ⇒ Object

Reduce constraints by removing them one by one and counting the results.

The constraint whose removal leads to the highest record count is removed from the overall constraint set.



6
7
8
9
10
11
12
 
# File 'lib/cohort_scope/big_cohort.rb', line 6

def self.reduce_constraints(active_record, constraints)
  most_restrictive_constraint = constraints.keys.max_by do |key|
    conditions = CohortScope.conditions_for constraints.except(key)
    active_record.scoped.where(conditions).count
  end
  constraints.except most_restrictive_constraint
end