Count variants only once in Spree::Variant.suppliable

Variants are counted multiple times when they have stock in multiple stock
locations. Adding `distinct` fixes this behavior. Fixes solidusio#2868

CHANGELOG.md

@@ -225,182 +225,6 @@ should respond to `call`.
 - Add article that documents a Spree::Order journey [#2803](https://github.com/solidusio/solidus/pull/2803) ([benjaminwil](https://github.com/benjaminwil))
 
 
-### Major Changes
-
-**Added Api::CouponCodesController#destroy endpoint**
-
-A new endpoint has been added to Solidus API. It allows to remove a coupon code
-from an order. It has currently no backend or frontend implementation but
-it's common for custom stores to require it.
-
-- Add Api::CouponCodesController#destroy endpoint [#3047](https://github.com/solidusio/solidus/pull/3047) ([aitbw](https://github.com/aitbw))
-
-**Moved Reports into an extension**
-
-We removed the reports section from admin to an extension. If you use it you
-have to add it back manually by adding
-
-    gem 'solidus_reports', github: "solidusio-contrib/solidus_reports"
-
-- Move reports from backend into an extension [#2814](https://github.com/solidusio/solidus/pull/2814) ([jtapia](https://github.com/jtapia))
-
-**Add a store credit reasons UI in Admin**
-
-The only way to manage store credit reasons was via console or using a data
-migration.
-
-- Add a store credit reasons Admin UI [#2798](https://github.com/solidusio/solidus/pull/2798) ([jtapia](https://github.com/jtapia))
-
-**Skip forgery protection in api controllers**
-
-Rails is now enabling forgery protection by default so we need to explicitly
-disable it for api requests, as described here:
-
-http://api.rubyonrails.org/classes/ActionController/RequestForgeryProtection.html
-
-This PR also enables forgery protection by default in the specs dummy app so
-that we can really test that the api code is working in a real Rails 5.2+
-environment.
-
-- Skip forgery protection in api controllers [#2800](https://github.com/solidusio/solidus/pull/2800) ([kennyadsl](https://github.com/kennyadsl))
-
-**Add a Gallery to handle variants and products images**
-
-All images that we send to the view layer is now using these classes that
-contain the logic to retrieve images and are easier to extend. If you have
-a lot of customization on how you display images you probably need to take
-a look at how this has been implemented.
-
-- Add `#gallery` to `Variant` and `Product` [#2337](https://github.com/solidusio/solidus/pull/2337) ([swcraig](https://github.com/swcraig))
-
-**Replace jquery_ujs with rails-ujs**
-
-This is the Rails standard now. There could be some action required, depending
-on if the manifest provided by solidus has been changed. Please read the
-PR description for more info.
-
-- Replace jquery_ujs with rails-ujs in frontend and backend [#3027](https://github.com/solidusio/solidus/pull/3027) ([kennyadsl](https://github.com/kennyadsl))
-
-### Core
-
-- Fix Spree::Variant inconsistency due to lack of product association [#3043](https://github.com/solidusio/solidus/pull/3043) ([rubenochiavone](https://github.com/rubenochiavone))
-- Make seed file fully idempotent [#3033](https://github.com/solidusio/solidus/pull/3033) ([jontarg](https://github.com/jontarg))
-- Implement stock location sorters [#2783](https://github.com/solidusio/solidus/pull/2783) ([aldesantis](https://github.com/aldesantis))
-- Fix multiple Money deprecation warnings. Now using html_wrap option which causes each piece of the price to be wrapped in span tags with specific classes for easier styling, but this may break existing stores' custom styles.
-[#2912](https://github.com/solidusio/solidus/pull/2912) ([JDutil](https://github.com/JDutil))
-- Remove update_totals/persist_totals delegation [#3012](https://github.com/solidusio/solidus/pull/3012) ([jarednorman](https://github.com/jarednorman))
-- Fix autoload issue. Replace require/load with require_dependency. [#3008](https://github.com/solidusio/solidus/pull/3008) ([bitberryru](https://github.com/bitberryru))
-- Enable partial doubles verification for RSpec [#3005](https://github.com/solidusio/solidus/pull/3005) ([cedum](https://github.com/cedum))
-- [v2.7] Fix deprecations to make Solidus work with Rails 5.2.2 [#2992](https://github.com/solidusio/solidus/pull/2992) ([kennyadsl](https://github.com/kennyadsl))
-- Add acts_as_list to Spree::StockLocation [#2953](https://github.com/solidusio/solidus/pull/2953) ([rymai](https://github.com/rymai))
-- Add missing i18n English values [#2942](https://github.com/solidusio/solidus/pull/2942) ([jacobherrington](https://github.com/jacobherrington))
-- Allow to bypass SKU validation [#2937](https://github.com/solidusio/solidus/pull/2937) ([fastjames](https://github.com/fastjames))
-- Add translation for details attribute of LogEntry model [#2925](https://github.com/solidusio/solidus/pull/2925) ([bitberryru](https://github.com/bitberryru))
-- Spree::FulfilmentChanger stock allocation fix [#2908](https://github.com/solidusio/solidus/pull/2908) ([spaghetticode](https://github.com/spaghetticode))
-- DRY Spree::OrderContents [#2907](https://github.com/solidusio/solidus/pull/2907) ([spaghetticode](https://github.com/spaghetticode))
-- Improve trustworthiness of a content items price. [#2897](https://github.com/solidusio/solidus/pull/2897) ([jacquesporveau](https://github.com/jacquesporveau))
-- Use ActiveRecord relation for Spree::Shipment#line_items [#2886](https://github.com/solidusio/solidus/pull/2886) ([spaghetticode](https://github.com/spaghetticode))
-- Round calculator values based on order currency [#2877](https://github.com/solidusio/solidus/pull/2877) ([ericsaupe](https://github.com/ericsaupe))
-- Add an allocator class to extend the Solidus initial allocation logic [#2810](https://github.com/solidusio/solidus/pull/2810) ([vassalloandrea](https://github.com/vassalloandrea))
-- Remove default address dependency part 2 [#2802](https://github.com/solidusio/solidus/pull/2802) ([kennyadsl](https://github.com/kennyadsl))
-- Stock location sorters [#2783](https://github.com/solidusio/solidus/pull/2783) ([aldesantis](https://github.com/aldesantis))
-- Recalculate order after reimbursement creation [#2711](https://github.com/solidusio/solidus/pull/2711) ([DanielePalombo](https://github.com/DanielePalombo))
-- Finalize shipment after inventory units are added to completed order [#2331](https://github.com/solidusio/solidus/pull/2331) ([DanielePalombo](https://github.com/DanielePalombo))
-
-### Backend
-
-- Use right language_locale_key [#3044](https://github.com/solidusio/solidus/pull/3044) ([DanielePalombo](https://github.com/DanielePalombo))
-- Fix missing image in autocomplete variant [#3032](https://github.com/solidusio/solidus/pull/3032) ([rubenochiavone](https://github.com/rubenochiavone))
-- Skip populating states select on default country not included in available countries [#3030](https://github.com/solidusio/solidus/pull/3030) ([mdesantis](https://github.com/mdesantis))
-- Add favicon to the admin layout [#3025](https://github.com/solidusio/solidus/pull/3025) ([mdesantis](https://github.com/mdesantis))
-- Standardize shared resource links [#2997](https://github.com/solidusio/solidus/pull/2997) ([brchristian](https://github.com/brchristian))
-- Use Spree::Variant#should_track_inventory? to disable 'Count on hand' input [#2977](https://github.com/solidusio/solidus/pull/2977) ([aitbw](https://github.com/aitbw))
-- Disable 'count on hand' input when 'track inventory' option is set to false [#2960](https://github.com/solidusio/solidus/pull/2960) ([aitbw](https://github.com/aitbw))
-- Bug/remove mini image from admin view [#2976](https://github.com/solidusio/solidus/pull/2976) ([nvh0412](https://github.com/nvh0412))
-- Prevent multiple refund creations with accidental double clicks [#2970](https://github.com/solidusio/solidus/pull/2970) ([spaghetticode](https://github.com/spaghetticode))
-- Fix "Stock" admin nav double highlight [#2969](https://github.com/solidusio/solidus/pull/2969) ([tvdeyen](https://github.com/tvdeyen))
-- Added a link to the frontend product from the backend product edit page [#2956](https://github.com/solidusio/solidus/pull/2956) ([seand7565](https://github.com/seand7565))
-- Use filter over search for filter options [#2940](https://github.com/solidusio/solidus/pull/2940) ([jacobherrington](https://github.com/jacobherrington))
-- Add ordering to menu items [#2939](https://github.com/solidusio/solidus/pull/2939) ([jacobherrington](https://github.com/jacobherrington))
-- Change new order creation link [#2936](https://github.com/solidusio/solidus/pull/2936) ([jacobherrington](https://github.com/jacobherrington))
-- remove unused routes and actions from return authorizations [#2929](https://github.com/solidusio/solidus/pull/2929) ([ccarruitero](https://github.com/ccarruitero))
-- Add response with error message on failure destroy action [#2920](https://github.com/solidusio/solidus/pull/2920) ([bitberryru](https://github.com/bitberryru))
-- Fix tab selection in sidebar navigation [#2918](https://github.com/solidusio/solidus/pull/2918) ([bitberryru](https://github.com/bitberryru))
-- Improve text in "new promotions" form for better usability [#2917](https://github.com/solidusio/solidus/pull/2917) ([michaelmichael](https://github.com/michaelmichael))
-- fix closing tag mismatch [#2901](https://github.com/solidusio/solidus/pull/2901) ([bitberryru](https://github.com/bitberryru))
-- Fix a N+1 query problem in the orders controller [#2894](https://github.com/solidusio/solidus/pull/2894) ([rymai](https://github.com/rymai))
-- Show errors on admin shipment line item destroy failure [#2892](https://github.com/solidusio/solidus/pull/2892) ([spaghetticode](https://github.com/spaghetticode))
-- Revert tooltip observer change as it does not work properly. [#2890](https://github.com/solidusio/solidus/pull/2890) ([JDutil](https://github.com/JDutil))
-- Add a Master SKU field to the products form [#2875](https://github.com/solidusio/solidus/pull/2875) ([jacobherrington](https://github.com/jacobherrington))
-- Create a new promotion code inside an existing promotion [#2872](https://github.com/solidusio/solidus/pull/2872) ([stem](https://github.com/stem))
-- New stock management [#2862](https://github.com/solidusio/solidus/pull/2862) ([tvdeyen](https://github.com/tvdeyen))
-- Fix highlighting on tax sub menu [#2854](https://github.com/solidusio/solidus/pull/2854) ([jacobherrington](https://github.com/jacobherrington))
-- Fix a bug with the settings subnav  [#2853](https://github.com/solidusio/solidus/pull/2853) ([jacobherrington](https://github.com/jacobherrington))
-- allow multiple taxons on product creation [#2840](https://github.com/solidusio/solidus/pull/2840) ([jacobherrington](https://github.com/jacobherrington))
-- add en-US locale to select2 [#2805](https://github.com/solidusio/solidus/pull/2805) ([afdev82](https://github.com/afdev82))
-- Use two column layout for stock location form [#2727](https://github.com/solidusio/solidus/pull/2727) ([tvdeyen](https://github.com/tvdeyen))
-
-### API
-
-- Fix N+1 problem on Api::TaxonsController#index [#3011](https://github.com/solidusio/solidus/pull/3011) ([stem](https://github.com/stem))
-- Include records on API Order / Product queries [#3002](https://github.com/solidusio/solidus/pull/3002) ([fastjames](https://github.com/fastjames))
-
-### Frontend
-
-- Rescue from `Spree::Order::InsufficientStock` on `frontend` checkout flow [#3023](https://github.com/solidusio/solidus/pull/3023) ([spaghetticode](https://github.com/spaghetticode))
-- Fix coupon code placeholder value. [#3009](https://github.com/solidusio/solidus/pull/3009) ([bitberryru](https://github.com/bitberryru))
-- Fix closing td [#2999](https://github.com/solidusio/solidus/pull/2999) ([lukasbischof](https://github.com/lukasbischof))
-- Add padding to the order summary [#2903](https://github.com/solidusio/solidus/pull/2903) ([jacobherrington](https://github.com/jacobherrington))
-
-### Deprecations
-
-- Deprecate 'X-SPREE-TOKEN' header 2 [#3029](https://github.com/solidusio/solidus/pull/3029) ([twist900](https://github.com/twist900))
-- Update Jbuilder to v2.8 to fix deprecation warnings [#2962](https://github.com/solidusio/solidus/pull/2962) ([aitbw](https://github.com/aitbw))
-- Deprecate existing coupon codes methods [#2958](https://github.com/solidusio/solidus/pull/2958) ([aitbw](https://github.com/aitbw))
-- Fix deprecation warning for Spree::Shipment#reverse_chronological scope [#2921](https://github.com/solidusio/solidus/pull/2921) ([aitbw](https://github.com/aitbw))
-- Add deprecation warning for Spree.t [#2915](https://github.com/solidusio/solidus/pull/2915) ([JDutil](https://github.com/JDutil))
-- Fix money deprecation warning. [#2912](https://github.com/solidusio/solidus/pull/2912) ([JDutil](https://github.com/JDutil))
-
-### Misc
-
-- Update issues/PRs templates [#3026](https://github.com/solidusio/solidus/pull/3026) ([kennyadsl](https://github.com/kennyadsl))
-- Explicitly require Bundler within Rakefile [#3022](https://github.com/solidusio/solidus/pull/3022) ([mdesantis](https://github.com/mdesantis))
-- Enable partial doubles verification for RSpec (part 2) [#3015](https://github.com/solidusio/solidus/pull/3015) ([cedum](https://github.com/cedum))
-- SVG images [#2995](https://github.com/solidusio/solidus/pull/2995) ([elia](https://github.com/elia))
-- Add margin to billing fields [#2985](https://github.com/solidusio/solidus/pull/2985) ([jacobherrington](https://github.com/jacobherrington))
-- Add criteria for merging a PR [#2983](https://github.com/solidusio/solidus/pull/2983) ([jacobherrington](https://github.com/jacobherrington))
-- Lint ERB files via HoundCI [#2982](https://github.com/solidusio/solidus/pull/2982) ([kennyadsl](https://github.com/kennyadsl))
-- Move script files to bin + documentation [#2971](https://github.com/solidusio/solidus/pull/2971) ([elia](https://github.com/elia))
-- Upgrade rack to 2.0.6 for security reasons [#2964](https://github.com/solidusio/solidus/pull/2964) ([tvdeyen](https://github.com/tvdeyen))
-- Add i18n-tasks and normalize translations [#2963](https://github.com/solidusio/solidus/pull/2963) ([afdev82](https://github.com/afdev82))
-- Add script to skip CircleCI on guides [#2955](https://github.com/solidusio/solidus/pull/2955) ([jacobherrington](https://github.com/jacobherrington))
-- Dont need to lockdown autoprefixer-rails. [#2916](https://github.com/solidusio/solidus/pull/2916) ([JDutil](https://github.com/JDutil))
-- fix translations keys [#2902](https://github.com/solidusio/solidus/pull/2902) ([bitberryru](https://github.com/bitberryru))
-- symbol can't be argument for :count in east slavic locales [#2900](https://github.com/solidusio/solidus/pull/2900) ([bitberryru](https://github.com/bitberryru))
-- Fix reference to logo on heroku template [#2896](https://github.com/solidusio/solidus/pull/2896) ([chukitow](https://github.com/chukitow))
-- Move to sassc-rails [#2883](https://github.com/solidusio/solidus/pull/2883) ([jacobherrington](https://github.com/jacobherrington))
-- Update .travis.yml example to non EOL versions [#2867](https://github.com/solidusio/solidus/pull/2867) ([jacobherrington](https://github.com/jacobherrington))
-
-### Docs & Guides
-
-- Setup Netlify site for yard docs [#3019](https://github.com/solidusio/solidus/pull/3019) ([tvdeyen](https://github.com/tvdeyen))
-- Update `add-configuration` guide page [#3001](https://github.com/solidusio/solidus/pull/3001) ([spaghetticode](https://github.com/spaghetticode))
-- Expand the promotion rules implementation example [#2954](https://github.com/solidusio/solidus/pull/2954) ([jacobherrington](https://github.com/jacobherrington))
-- Add missing doc links [#2948](https://github.com/solidusio/solidus/pull/2948) ([jacobherrington](https://github.com/jacobherrington))
-- Add a table of contents to the readme [#2945](https://github.com/solidusio/solidus/pull/2945) ([jacobherrington](https://github.com/jacobherrington))
-- Standardize capitalization [#2943](https://github.com/solidusio/solidus/pull/2943) ([jacobherrington](https://github.com/jacobherrington))
-- improve decorators / contributing docs [#2933](https://github.com/solidusio/solidus/pull/2933) ([elia](https://github.com/elia))
-- Guides improvements [#2923](https://github.com/solidusio/solidus/pull/2923) ([kennyadsl](https://github.com/kennyadsl))
-- Add API section to developer guide table of contents [#2909](https://github.com/solidusio/solidus/pull/2909) ([benjaminwil](https://github.com/benjaminwil))
-- Add a Netlify configuration for deploying guides site [#2893](https://github.com/solidusio/solidus/pull/2893) ([tvdeyen](https://github.com/tvdeyen))
-- Use logo.svg in the README [#2887](https://github.com/solidusio/solidus/pull/2887) ([jacobherrington](https://github.com/jacobherrington))
-- Fix a security vulnerability in guides [#2885](https://github.com/solidusio/solidus/pull/2885) ([kennyadsl](https://github.com/kennyadsl))
-- Add comments to the issue template [#2884](https://github.com/solidusio/solidus/pull/2884) ([jacobherrington](https://github.com/jacobherrington))
-- Update promotion actions documentation [#2871](https://github.com/solidusio/solidus/pull/2871) ([jacobherrington](https://github.com/jacobherrington))
-- Add a reference to the Writing Extensions doc [#2851](https://github.com/solidusio/solidus/pull/2851) ([jacobherrington](https://github.com/jacobherrington))
-- Add article that documents a Spree::Order journey [#2803](https://github.com/solidusio/solidus/pull/2803) ([benjaminwil](https://github.com/benjaminwil))
-
-
 ## Solidus 2.7.0 (2018-09-14)
 
 ### Major Changes

core/spec/models/spree/variant_spec.rb

@@ -783,6 +783,10 @@
       expect( subject ).not_to include(out_of_stock_variant)
     end
 
+    it "includes variants only once" do
+      expect(subject.to_a.count(in_stock_variant)).to be 1
+    end
+
     context "inventory levels globally not tracked" do
       before { Spree::Config.track_inventory_levels = false }