instance method
perform_calculation
Ruby on Rails 5.0.7.2
Since v3.0.20 Private — implementation detail, not part of the public APISignature
perform_calculation(operation, column_name)No documentation comment.
Parameters
-
operationreq -
column_namereq
Source
# File activerecord/lib/active_record/relation/calculations.rb, line 191
def perform_calculation(operation, column_name)
operation = operation.to_s.downcase
# If #count is used with #distinct (i.e. `relation.distinct.count`) it is
# considered distinct.
distinct = self.distinct_value
if operation == "count"
column_name ||= select_for_count
column_name = primary_key if column_name == :all && distinct
distinct = nil if column_name =~ /\s*DISTINCT[\s(]+/i
end
if group_values.any?
execute_grouped_calculation(operation, column_name, distinct)
else
execute_simple_calculation(operation, column_name, distinct)
end
end
Defined in activerecord/lib/active_record/relation/calculations.rb line 191
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Defined in ActiveRecord::Calculations