Module: ActiveRecord::CounterCache::ClassMethods

Defined in:
lib/composite_primary_keys/counter_cache.rb

Instance Method Summary collapse

Instance Method Details

#update_counters(id, counters) ⇒ Object 



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# File 'lib/composite_primary_keys/counter_cache.rb', line 4

def update_counters(id, counters)
  touch = counters.delete(:touch)

  updates = counters.map do |counter_name, value|
    operator = value < 0 ? "-" : "+"
    quoted_column = connection.quote_column_name(counter_name)
    "#{quoted_column} = COALESCE(#{quoted_column}, 0) #{operator} #{value.abs}"
  end

  if touch
    names = touch if touch != true
    touch_updates = touch_attributes_with_time(*names)
    updates << sanitize_sql_for_assignment(touch_updates) unless touch_updates.empty?
  end

  if id.is_a?(Relation) && self == id.klass
    relation = id
  # CPK
  elsif primary_key.is_a?(Array)
    predicate = self.cpk_id_predicate(self.arel_table, self.primary_key, id)
    relation = unscoped.where!(predicate)
  else
    relation = unscoped.where!(primary_key => id)
  end

  relation.update_all updates.join(", ")
end