[Feature] Shipping Rule Calculation based on Net Weight (#11770)

* [new] Calculate shipping tax based on weight

* [fix] Change field name weight to weight_per_unit in SI Item

* [new] Shipping Rule based tax for selling module

* [new] Shipping rule based on weight added to Buying module

* [fix] Conflict in jsons

* [fix] Removed Redudant add_fetch

* [fix] Codacy fixed

* [fix] Print hide added

erpnext/stock/doctype/delivery_note/delivery_note.json

@@ -1499,6 +1499,36 @@
    "set_only_once": 0, 
    "unique": 0
   }, 
+  {
+   "allow_bulk_edit": 0, 
+   "allow_on_submit": 0, 
+   "bold": 0, 
+   "collapsible": 0, 
+   "columns": 0, 
+   "fieldname": "total_net_weight", 
+   "fieldtype": "Float", 
+   "hidden": 0, 
+   "ignore_user_permissions": 0, 
+   "ignore_xss_filter": 0, 
+   "in_filter": 0, 
+   "in_global_search": 0, 
+   "in_list_view": 0, 
+   "in_standard_filter": 0, 
+   "label": "Total Net Weight", 
+   "length": 0, 
+   "no_copy": 0, 
+   "permlevel": 0, 
+   "precision": "", 
+   "print_hide": 1, 
+   "print_hide_if_no_value": 0, 
+   "read_only": 1, 
+   "remember_last_selected_value": 0, 
+   "report_hide": 0, 
+   "reqd": 0, 
+   "search_index": 0, 
+   "set_only_once": 0, 
+   "unique": 0
+  }, 
   {
    "allow_bulk_edit": 0, 
    "allow_on_submit": 0, 
@@ -3611,7 +3641,7 @@
  "istable": 0, 
  "max_attachments": 0, 
  "menu_index": 0, 
- "modified": "2017-11-15 01:03:14.856512", 
+ "modified": "2017-11-29 14:13:32.770027", 
  "modified_by": "Administrator", 
  "module": "Stock", 
  "name": "Delivery Note", 

erpnext/stock/doctype/item/item.json

@@ -934,7 +934,7 @@
    "columns": 0, 
    "depends_on": "is_stock_item", 
    "description": "", 
-   "fieldname": "net_weight", 
+   "fieldname": "weight_per_unit", 
    "fieldtype": "Float", 
    "hidden": 0, 
    "ignore_user_permissions": 0, 
@@ -943,7 +943,7 @@
    "in_global_search": 0, 
    "in_list_view": 0, 
    "in_standard_filter": 0, 
-   "label": "Net Weight", 
+   "label": "Weight Per Unit", 
    "length": 0, 
    "no_copy": 0, 
    "permlevel": 0, 
@@ -3360,7 +3360,7 @@
  "issingle": 0, 
  "istable": 0, 
  "max_attachments": 1, 
- "modified": "2017-11-13 15:49:13.213990", 
+ "modified": "2017-11-20 12:18:07.259756", 
  "modified_by": "Administrator", 
  "module": "Stock", 
  "name": "Item", 

erpnext/stock/get_item_details.py

@@ -242,7 +242,9 @@ def get_basic_details(args, item):
 		"supplier": item.default_supplier,
 		"update_stock": args.get("update_stock") if args.get('doctype') in ['Sales Invoice', 'Purchase Invoice'] else 0,
 		"delivered_by_supplier": item.delivered_by_supplier if args.get("doctype") in ["Sales Order", "Sales Invoice"] else 0,
-		"is_fixed_asset": item.is_fixed_asset
+		"is_fixed_asset": item.is_fixed_asset,
+		"weight_per_unit":item.weight_per_unit,
+		"weight_uom":item.weight_uom,
 	})
 
 	# calculate conversion factor