Module: ActiveRecord::CounterCache

Defined in:
lib/update_counters_with_condition.rb

Instance Method Summary collapse

Instance Method Details

#update_counters_with_condition(id, counters) ⇒ Object 



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# File 'lib/update_counters_with_condition.rb', line 5

def update_counters_with_condition(id, counters)
  if id.is_a?(Hash)
    updates = counters.inject([]) { |list, (counter_name, increment)|
      sign = increment < 0 ? "-" : "+"
      list << "#{connection.quote_column_name(counter_name)} = COALESCE(#{connection.quote_column_name(counter_name)}, 0) #{sign} #{increment.abs}"
    }.join(", ")
    condition = id.map{|column_name, value| "#{connection.quote_column_name(column_name)} = #{quote_value(value)}"}.join(" AND ")
    update_all(updates, condition)
  else
    update_counters(id, counters)
  end
end