Allow synchronising units when uploading

app/controllers/articles_controller.rb

@@ -138,8 +138,9 @@ class ArticlesController < ApplicationController
   # Update articles from a spreadsheet
   def parse_upload
     uploaded_file = params[:articles]['file']
-    outlist_absent = (params[:articles]['outlist_absent'] == '1')
-    options = {filename: uploaded_file.original_filename, outlist_absent: outlist_absent}
+    options = {filename: uploaded_file.original_filename}
+    options[:outlist_absent] = (params[:articles]['outlist_absent'] == '1')
+    options[:convert_units] = (params[:articles]['convert_units'] == '1')
     @updated_article_pairs, @outlisted_articles, @new_articles = @supplier.sync_from_file uploaded_file.tempfile, options
     if @updated_article_pairs.empty? && @outlisted_articles.empty? && @new_articles.empty?
       redirect_to supplier_articles_path(@supplier), :notice => I18n.t('articles.controller.parse_upload.notice')

app/models/article.rb

@@ -116,11 +116,16 @@ class Article < ActiveRecord::Base
   end
 
   # Return article attributes that were changed (incl. unit conversion)
-  # @param [Article] New article to update self
+  # @param new_article [Article] New article to update self
+  # @option options [Boolean] :convert_units Omit or set to +true+ to keep current unit and recompute unit quantity and price.
   # @return [Hash<Symbol, Object>] Attributes with new values
-  def unequal_attributes(new_article)
-    # try to convert different units
+  def unequal_attributes(new_article, options={})
+    # try to convert different units when desired
+    if options[:convert_units] == false
+      new_price, new_unit_quantity = nil, nil
+    else
       new_price, new_unit_quantity = convert_units(new_article)
+    end
     if new_price && new_unit_quantity
       new_unit = self.unit
     else

app/models/supplier.rb

@@ -60,6 +60,7 @@ class Supplier < ActiveRecord::Base
   # @param file [File] Spreadsheet file to parse
   # @param options [Hash] Options passed to {FoodsoftFile#parse} except when listed here.
   # @option options [Boolean] :outlist_absent Set to +true+ to remove articles not in spreadsheet.
+  # @option options [Boolean] :convert_units Omit or set to +true+ to keep current units, recomputing unit quantity and price.
   def sync_from_file(file, options={})
     all_order_numbers = []
     updated_article_pairs, outlisted_articles, new_articles = [], [], []
@@ -73,7 +74,7 @@ class Supplier < ActiveRecord::Base
         if article.nil?
           new_articles << new_article
         else
-          unequal_attributes = article.unequal_attributes(new_article)
+          unequal_attributes = article.unequal_attributes(new_article, options.slice(:convert_units))
           unless unequal_attributes.empty?
             article.attributes = unequal_attributes
             updated_article_pairs << [article, unequal_attributes]

app/views/articles/upload.html.haml

@@ -78,7 +78,10 @@
   .control-group
     %label(for="articles_outlist_absent")
       = f.check_box "outlist_absent"
-      = t '.outlist_absent'
+      = t '.options.outlist_absent'
+    %label(for="articles_convert_units")
+      = f.check_box "convert_units"
+      = t '.options.convert_units'
 
   .form-actions
     = submit_tag t('.submit'), class: 'btn btn-primary'

config/locales/en.yml

@@ -438,6 +438,8 @@ en:
         reserved: "(Reserved)"
         status: Status (x=skip)
       file_label: Please choose a compatible file
+      options:
+        convert_units: Keep current units, recompute unit quantity and price (like synchronize)
         outlist_absent: Delete articles not in uploaded file
       sample:
         juices: Juices

spec/integration/articles_spec.rb

@@ -63,12 +63,14 @@ describe ArticlesController, :type => :feature do
     end
 
     describe "can update existing article" do
-      let!(:article) { create :article, supplier: supplier, name: 'Foobar', order_number: 1 }
+      let!(:article) { create :article, supplier: supplier, name: 'Foobar', order_number: 1, unit: '250 g' }
       it do
         find('input[type="submit"]').click
         expect(find("#articles_#{article.id}_name").value).to eq 'Tomatoes'
         find('input[type="submit"]').click
-        expect(article.reload.name).to eq 'Tomatoes'
+        article.reload
+        expect(article.name).to eq 'Tomatoes'
+        expect([article.unit, article.unit_quantity, article.price]).to eq ['500 g', 20, 1.2]
       end
     end
 
@@ -97,5 +99,17 @@ describe ArticlesController, :type => :feature do
         expect(article.reload.deleted?).to be true
       end
     end
+
+    describe "can convert units when updating" do
+      let!(:article) { create :article, supplier: supplier, order_number: 1, unit: '250 g' }
+      it do
+        check('articles_convert_units')
+        find('input[type="submit"]').click
+        expect(find("#articles_#{article.id}_name").value).to eq 'Tomatoes'
+        find('input[type="submit"]').click
+        article.reload
+        expect([article.unit, article.unit_quantity, article.price]).to eq ['250 g', 40, 0.6]
+      end
+    end
   end
 end