Class: Spree::Promotion::Actions::CreateItemAdjustments

Inherits:
Spree::PromotionAction show all
Includes:
Core::CalculatedAdjustments
Defined in:
app/models/spree/promotion/actions/create_item_adjustments.rb

Instance Method Summary collapse

Methods included from Core::CalculatedAdjustments

included

Instance Method Details

#compute_amount(adjustable) ⇒ Object

Ensure a negative amount which does not exceed the sum of the order’s item_total and ship_total



42
43
44
45
 
# File 'app/models/spree/promotion/actions/create_item_adjustments.rb', line 42

def compute_amount(adjustable)
  amount = self.calculator.compute(adjustable).to_f.abs
  [adjustable.total, amount].min * -1
end

#create_adjustment(adjustable, order) ⇒ Object 



28
29
30
31
32
33
34
35
36
37
38
 
# File 'app/models/spree/promotion/actions/create_item_adjustments.rb', line 28

def create_adjustment(adjustable, order)
  amount = self.compute_amount(adjustable)
  return if amount == 0
  self.adjustments.create!(
    amount: amount,
    adjustable: adjustable,
    order: order,
    label: "#{Spree.t(:promotion)} (#{promotion.name})",
  )
  true
end

#perform(payload = {}) ⇒ Object 



14
15
16
17
18
19
20
21
22
23
24
25
26
 
# File 'app/models/spree/promotion/actions/create_item_adjustments.rb', line 14

def perform(payload = {})
  order = payload[:order]
  # Find only the line items which have not already been adjusted by this promotion
  # HACK: Need to use [0] because `pluck` may return an empty array, which AR helpfully
  # coverts to meaning NOT IN (NULL) and the DB isn't happy about that.
  already_adjusted_line_items = [0] + self.adjustments.pluck(:adjustable_id)
  result = false
  order.line_items.where("id NOT IN (?)", already_adjusted_line_items).find_each do |line_item|
    current_result = self.create_adjustment(line_item, order)
    result ||= current_result
  end
  return result
end