Module: Counter::Recalculatable

Extended by:
ActiveSupport::Concern
Included in:
Value
Defined in:
app/models/concerns/counter/recalculatable.rb

Instance Method Summary collapse

Instance Method Details

#count_by_sql ⇒ Object 



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# File 'app/models/concerns/counter/recalculatable.rb', line 25

def count_by_sql
  recalc_scope.count
end

#recalc! ⇒ Object 



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# File 'app/models/concerns/counter/recalculatable.rb', line 4

def recalc!
  if definition.calculated?
    calculate!
  elsif definition.manual?
    raise Counter::Error.new("Can't recalculate a manual counter")
  else
    with_lock do
      new_value = definition.sum? ? sum_by_sql : count_by_sql

      self.class.upsert(
        attributes.without("id", "created_at", "updated_at").symbolize_keys.merge(value: new_value),
        unique_by: [:parent_type, :parent_id, :name],
        on_duplicate: Arel.sql("value = counter_values.value + EXCLUDED.value"),
        record_timestamps: true
      )

      reload
    end
  end
end

#recalc_scope ⇒ Object

use this scope when recalculating the value



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# File 'app/models/concerns/counter/recalculatable.rb', line 34

def recalc_scope
  parent.association(definition.association_name).scope
end

#sum_by_sql ⇒ Object 



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# File 'app/models/concerns/counter/recalculatable.rb', line 29

def sum_by_sql
  recalc_scope.sum(definition.column_to_count)
end