Module: RailsTrade::TradeItem

Extended by:
ActiveSupport::Concern
Included in:
TradeItem
Defined in:
app/models/rails_trade/trade_item.rb

Instance Method Summary collapse

Instance Method Details

#compute_promote ⇒ Object 



65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
 
# File 'app/models/rails_trade/trade_item.rb', line 65

def compute_promote
  good.valid_promote_goods.map do |promote_good|
    value = metering_attributes.fetch(promote_good.promote.metering)
    promote_charge = promote_good.promote.compute_charge(value, **extra)
    next unless promote_charge
    if promote_good.promote.single?
      tp = self.trade_promotes.build(promote_charge_id: promote_charge.id, promote_good_id: promote_good.id)
    else
      tp = trade.trade_promotes.build(promote_charge_id: promote_charge.id, promote_good_id: promote_good.id)
    end
    tp.compute_amount
  end

  return unless trade.buyer
  trade.buyer.promote_buyers.each do |promote_buyer|
    value = metering_attributes.fetch(promote_buyer.promote.metering)
    promote_charge = promote_buyer.promote.compute_charge(value, **extra)
    next unless promote_charge
    if promote_good.promote.single?
      tp = self.trade_promotes.build(promote_charge_id: promote_charge.id, promote_buyer_id: promote_buyer.id, promote_good_id: promote_buyer.promote_good_id)
    else
      tp = trade.trade_promotes.build(promote_charge_id: promote_charge.id, promote_buyer_id: promote_buyer.id, promote_good_id: promote_buyer.promote_good_id)
    end
    tp.compute_amount
  end
end

#confirm_ordered! ⇒ Object 



140
141
142
 
# File 'app/models/rails_trade/trade_item.rb', line 140

def confirm_ordered!
  self.good.order_done
end

#confirm_paid! ⇒ Object 



144
145
 
# File 'app/models/rails_trade/trade_item.rb', line 144

def confirm_paid!
end

#confirm_part_paid! ⇒ Object 



147
148
 
# File 'app/models/rails_trade/trade_item.rb', line 147

def confirm_part_paid!
end

#confirm_refund! ⇒ Object 



150
151
 
# File 'app/models/rails_trade/trade_item.rb', line 150

def confirm_refund!
end

#discount_price ⇒ Object

批发价和零售价之间的差价，即批发折扣



53
54
55
 
# File 'app/models/rails_trade/trade_item.rb', line 53

def discount_price
  wholesale_price - (retail_price * number)
end

#init_amount ⇒ Object 



57
58
59
60
61
62
63
 
# File 'app/models/rails_trade/trade_item.rb', line 57

def init_amount
  self.original_amount = single_price * number
  self.advance_amount = good.advance_price
  self.amount = original_amount
  trade.item_amount += amount
  trade.amount += amount
end

#metering_attributes ⇒ Object 



136
137
138
 
# File 'app/models/rails_trade/trade_item.rb', line 136

def metering_attributes
  attributes.slice 'quantity', 'amount', 'number'
end

#original_quantity ⇒ Object 



48
49
50
 
# File 'app/models/rails_trade/trade_item.rb', line 48

def original_quantity
  good.unified_quantity * self.number
end

#reset_amount ⇒ Object 



118
119
120
121
122
123
124
 
# File 'app/models/rails_trade/trade_item.rb', line 118

def reset_amount
  self.additional_amount = trade_promotes.default_where('amount-gte': 0).sum(:amount)
  self.reduced_amount = trade_promotes.default_where('amount-lt': 0).sum(:amount)
  self.amount = original_amount + additional_amount + reduced_amount
  self.valid?
  self.changes
end

#reset_amount! ⇒ Object 



126
127
128
129
 
# File 'app/models/rails_trade/trade_item.rb', line 126

def reset_amount!
  self.reset_amount
  self.update_columns changes.transform_values(&->(o){ o[1] })
end

#sum_amount ⇒ Object 



92
93
94
95
96
97
98
99
100
101
 
# File 'app/models/rails_trade/trade_item.rb', line 92

def sum_amount
  self.additional_amount = trade_promotes.select(&->(o){ o.amount >= 0 }).sum(&:amount)
  self.reduced_amount = trade_promotes.select(&->(o){ o.amount < 0 }).sum(&:amount)  # 促销价格

  self.retail_price = single_price + additional_amount
  self.wholesale_price = original_amount + additional_amount

  self.amount = original_amount + additional_amount + reduced_amount  # 最终价格
  self
end

#sync_changed_amount ⇒ Object 



103
104
105
106
107
108
109
110
111
112
113
114
115
116
 
# File 'app/models/rails_trade/trade_item.rb', line 103

def sync_changed_amount
  self.amount = original_amount + additional_amount + reduced_amount

  changed_amount = amount - amount_before_last_save
  trade.item_amount += changed_amount
  trade.amount += changed_amount
  if trade.amount == trade.compute_saved_amount
    trade.save!
  else
    trade.errors.add :amount, 'not equal'
    logger.error "#{self.class.name}/#{trade.class.name}: #{trade.error_text}"
    raise ActiveRecord::RecordInvalid.new(trade)
  end
end

#valid_promote_buyers(buyer) ⇒ Object 



131
132
133
134
 
# File 'app/models/rails_trade/trade_item.rb', line 131

def valid_promote_buyers(buyer)
  ids = (available_promote_ids & buyer.all_promote_ids) - buyer.promote_buyers.pluck(:promote_id)
  Promote.where(id: ids)
end