Only perform scaling when a scale is present. Fixes items values not saving then loading as infinity.

app/assets/javascripts/admin/bulk_product_update.js.coffee

@@ -221,7 +221,10 @@ productEditModule.controller "AdminProductEditCtrl", [
 
     $scope.variantUnitValue = (product, variant) ->
       if variant.unit_value
-        variant.unit_value / product.variant_unit_scale
+        if product.variant_unit_scale
+          variant.unit_value / product.variant_unit_scale
+        else
+          variant.unit_value
       else
         null
 
@@ -376,7 +379,7 @@ productEditModule.controller "AdminProductEditCtrl", [
         if match
           product = $scope.findProduct(product.id)
           variant.unit_value  = parseFloat(match[1]) || null
-          variant.unit_value *= product.variant_unit_scale if variant.unit_value
+          variant.unit_value *= product.variant_unit_scale if variant.unit_value && product.variant_unit_scale
           variant.unit_description = match[3]
 
 

spec/javascripts/unit/bulk_product_update_spec.js.coffee

@@ -460,6 +460,11 @@ describe "AdminProductEditCtrl", ->
       variant = {unit_value: 5}
       expect(scope.variantUnitValue(product, variant)).toEqual 5000
 
+    it "returns the unscaled value when the product has no scale", ->
+      product = {}
+      variant = {unit_value: 5}
+      expect(scope.variantUnitValue(product, variant)).toEqual 5
+
     it "returns null when the variant has no unit_value", ->
       product = {}
       variant = {}
@@ -672,6 +677,16 @@ describe "AdminProductEditCtrl", ->
           unit_description: ''
           unit_value_with_description: "250.5"
 
+      it "does not convert value when using a non-scaled unit", ->
+        testProduct = {id: 123}
+        testVariant = {unit_value_with_description: "12"}
+        scope.products = [testProduct]
+        scope.packVariant(testProduct, testVariant)
+        expect(testVariant).toEqual
+          unit_value: 12
+          unit_description: ''
+          unit_value_with_description: "12"
+
 
     describe "filtering products", ->
       beforeEach ->