Module: Spree::Scopes::Dynamic

Defined in:
lib/spree/scopes/dynamic.rb

Overview

This module is extended by ProductScope

Class Method Summary collapse

Class Method Details

.price_scopes_for(products, scope_limit = 5) ⇒ Object

Sample dynamic scope generating from set of products generates 0 or (2..scope_limit) scopes for prices, based on number of products (uses Math.log, to guess number of scopes)



10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
 
# File 'lib/spree/scopes/dynamic.rb', line 10

def price_scopes_for(products, scope_limit=5)
  scopes = []

  # Price based scopes
  all_prices = products.map(&:price).sort

  ranges = [Math.log(products.length).floor, scope_limit].max

  if ranges >= 2
    l = all_prices.length / ranges
    scopes << ProductScope.new({:name => "master_price_lte", :arguments => [all_prices[l]] })

    (ranges - 2).times do |x|
      scopes << ProductScope.new({:name => "price_between",
                                  :arguments => [ all_prices[l*(x+1)+1], all_prices[l*(x+2)] ] })
    end
    scopes << ProductScope.new({:name => "master_price_gte", :arguments => [all_prices[l*(ranges-1)+1]] })
  end

  scopes
end