feat: price margin in buying (#24685)

diff --git a/erpnext/accounts/doctype/pricing_rule/pricing_rule.json b/erpnext/accounts/doctype/pricing_rule/pricing_rule.json
index d08a854..3377164 100644
--- a/erpnext/accounts/doctype/pricing_rule/pricing_rule.json
+++ b/erpnext/accounts/doctype/pricing_rule/pricing_rule.json
@@ -357,7 +357,6 @@
    "reqd": 1
   },
   {
-   "depends_on": "eval: doc.selling == 1",
    "fieldname": "margin",
    "fieldtype": "Section Break",
    "label": "Margin"
@@ -565,7 +564,7 @@
  "icon": "fa fa-gift",
  "idx": 1,
  "links": [],
- "modified": "2020-12-04 00:36:24.698219",
+ "modified": "2021-03-01 23:18:38.717613",
  "modified_by": "Administrator",
  "module": "Accounts",
  "name": "Pricing Rule",
diff --git a/erpnext/accounts/doctype/purchase_invoice_item/purchase_invoice_item.json b/erpnext/accounts/doctype/purchase_invoice_item/purchase_invoice_item.json
index 07e75ac..96ad0fd 100644
--- a/erpnext/accounts/doctype/purchase_invoice_item/purchase_invoice_item.json
+++ b/erpnext/accounts/doctype/purchase_invoice_item/purchase_invoice_item.json
@@ -28,10 +28,16 @@
   "stock_qty",
   "sec_break1",
   "price_list_rate",
-  "discount_percentage",
-  "discount_amount",
   "col_break3",
   "base_price_list_rate",
+  "section_break_26",
+  "margin_type",
+  "margin_rate_or_amount",
+  "rate_with_margin",
+  "column_break_30",
+  "discount_percentage",
+  "discount_amount",
+  "base_rate_with_margin",
   "sec_break2",
   "rate",
   "amount",
@@ -789,6 +795,7 @@
    "fieldname": "stock_uom_rate",
    "fieldtype": "Currency",
    "label": "Rate of Stock UOM",
+   "no_copy": 1,
    "options": "currency",
    "read_only": 1
   },
@@ -799,12 +806,54 @@
    "no_copy": 1,
    "print_hide": 1,
    "read_only": 1
+  },
+  {
+   "collapsible": 1,
+   "fieldname": "section_break_26",
+   "fieldtype": "Section Break",
+   "label": "Discount and Margin"
+  },
+  {
+   "depends_on": "price_list_rate",
+   "fieldname": "margin_type",
+   "fieldtype": "Select",
+   "label": "Margin Type",
+   "options": "\nPercentage\nAmount",
+   "print_hide": 1
+  },
+  {
+   "depends_on": "eval:doc.margin_type && doc.price_list_rate",
+   "fieldname": "margin_rate_or_amount",
+   "fieldtype": "Float",
+   "label": "Margin Rate or Amount",
+   "print_hide": 1
+  },
+  {
+   "depends_on": "eval:doc.margin_type && doc.price_list_rate && doc.margin_rate_or_amount",
+   "fieldname": "rate_with_margin",
+   "fieldtype": "Currency",
+   "label": "Rate With Margin",
+   "options": "currency",
+   "read_only": 1
+  },
+  {
+   "fieldname": "column_break_30",
+   "fieldtype": "Column Break"
+  },
+  {
+   "depends_on": "eval:doc.margin_type && doc.price_list_rate && doc.margin_rate_or_amount",
+   "fieldname": "base_rate_with_margin",
+   "fieldtype": "Currency",
+   "label": "Rate With Margin (Company Currency)",
+   "options": "Company:company:default_currency",
+   "print_hide": 1,
+   "read_only": 1
   }
  ],
  "idx": 1,
  "istable": 1,
  "links": [],
- "modified": "2021-01-30 21:43:21.488258",
+ "modified": "2021-02-23 00:59:52.614805",
  "modified_by": "Administrator",
  "module": "Accounts",
  "name": "Purchase Invoice Item",
diff --git a/erpnext/accounts/doctype/sales_invoice_item/sales_invoice_item.json b/erpnext/accounts/doctype/sales_invoice_item/sales_invoice_item.json
index b403c7b..8e6952a 100644
--- a/erpnext/accounts/doctype/sales_invoice_item/sales_invoice_item.json
+++ b/erpnext/accounts/doctype/sales_invoice_item/sales_invoice_item.json
@@ -818,6 +818,7 @@
    "fieldname": "stock_uom_rate",
    "fieldtype": "Currency",
    "label": "Rate of Stock UOM",
+   "no_copy": 1,
    "options": "currency",
    "read_only": 1
   }
@@ -825,7 +826,7 @@
  "idx": 1,
  "istable": 1,
  "links": [],
- "modified": "2021-01-30 21:42:37.796771",
+ "modified": "2021-02-23 01:05:22.123527",
  "modified_by": "Administrator",
  "module": "Accounts",
  "name": "Sales Invoice Item",
diff --git a/erpnext/buying/doctype/purchase_order_item/purchase_order_item.json b/erpnext/buying/doctype/purchase_order_item/purchase_order_item.json
index 75b2954..5baf693 100644
--- a/erpnext/buying/doctype/purchase_order_item/purchase_order_item.json
+++ b/erpnext/buying/doctype/purchase_order_item/purchase_order_item.json
@@ -27,11 +27,17 @@
   "stock_qty",
   "sec_break1",
   "price_list_rate",
+  "last_purchase_rate",
+  "col_break3",
+  "base_price_list_rate",
+  "discount_and_margin_section",
+  "margin_type",
+  "margin_rate_or_amount",
+  "rate_with_margin",
+  "column_break_28",
   "discount_percentage",
   "discount_amount",
-  "col_break3",
-  "last_purchase_rate",
-  "base_price_list_rate",
+  "base_rate_with_margin",
   "sec_break2",
   "rate",
   "amount",
@@ -733,15 +739,59 @@
    "fieldname": "stock_uom_rate",
    "fieldtype": "Currency",
    "label": "Rate of Stock UOM",
+   "no_copy": 1,
    "options": "currency",
    "read_only": 1
+  },
+  {
+   "collapsible": 1,
+   "fieldname": "discount_and_margin_section",
+   "fieldtype": "Section Break",
+   "label": "Discount and Margin"
+  },
+  {
+   "depends_on": "price_list_rate",
+   "fieldname": "margin_type",
+   "fieldtype": "Select",
+   "label": "Margin Type",
+   "options": "\nPercentage\nAmount",
+   "print_hide": 1
+  },
+  {
+   "depends_on": "eval:doc.margin_type && doc.price_list_rate",
+   "fieldname": "margin_rate_or_amount",
+   "fieldtype": "Float",
+   "label": "Margin Rate or Amount",
+   "print_hide": 1
+  },
+  {
+   "depends_on": "eval:doc.margin_type && doc.price_list_rate && doc.margin_rate_or_amount",
+   "fieldname": "rate_with_margin",
+   "fieldtype": "Currency",
+   "label": "Rate With Margin",
+   "options": "currency",
+   "print_hide": 1,
+   "read_only": 1
+  },
+  {
+   "fieldname": "column_break_28",
+   "fieldtype": "Column Break"
+  },
+  {
+   "depends_on": "eval:doc.margin_type && doc.price_list_rate && doc.margin_rate_or_amount",
+   "fieldname": "base_rate_with_margin",
+   "fieldtype": "Currency",
+   "label": "Rate With Margin (Company Currency)",
+   "options": "Company:company:default_currency",
+   "print_hide": 1,
+   "read_only": 1
   }
  ],
  "idx": 1,
  "index_web_pages_for_search": 1,
  "istable": 1,
  "links": [],
- "modified": "2021-01-30 21:44:41.816974",
+ "modified": "2021-02-23 01:00:27.132705",
  "modified_by": "Administrator",
  "module": "Buying",
  "name": "Purchase Order Item",
diff --git a/erpnext/controllers/taxes_and_totals.py b/erpnext/controllers/taxes_and_totals.py
index 10271cb..aab5770 100644
--- a/erpnext/controllers/taxes_and_totals.py
+++ b/erpnext/controllers/taxes_and_totals.py
@@ -109,7 +109,7 @@
 					elif item.discount_amount and item.pricing_rules:
 						item.rate =  item.price_list_rate - item.discount_amount
 
-				if item.doctype in ['Quotation Item', 'Sales Order Item', 'Delivery Note Item', 'Sales Invoice Item', 'POS Invoice Item']:
+				if item.doctype in ['Quotation Item', 'Sales Order Item', 'Delivery Note Item', 'Sales Invoice Item', 'POS Invoice Item', 'Purchase Invoice Item', 'Purchase Order Item', 'Purchase Receipt Item']:
 					item.rate_with_margin, item.base_rate_with_margin = self.calculate_margin(item)
 					if flt(item.rate_with_margin) > 0:
 						item.rate = flt(item.rate_with_margin * (1.0 - (item.discount_percentage / 100.0)), item.precision("rate"))
diff --git a/erpnext/public/js/controllers/buying.js b/erpnext/public/js/controllers/buying.js
index c963866..67b12fb 100644
--- a/erpnext/public/js/controllers/buying.js
+++ b/erpnext/public/js/controllers/buying.js
@@ -141,29 +141,6 @@
 		this.apply_price_list();
 	},
 
-	price_list_rate: function(doc, cdt, cdn) {
-		var item = frappe.get_doc(cdt, cdn);
-
-		frappe.model.round_floats_in(item, ["price_list_rate", "discount_percentage"]);
-
-		let item_rate = item.price_list_rate;
-		if (doc.doctype == "Purchase Order" && item.blanket_order_rate) {
-			item_rate = item.blanket_order_rate;
-		}
-
-		if (item.discount_percentage) {
-			item.discount_amount = flt(item_rate) * flt(item.discount_percentage) / 100;
-		}
-
-		if (item.discount_amount) {
-			item.rate = flt((item.price_list_rate) - (item.discount_amount), precision('rate', item));
-		} else {
-			item.rate = item_rate;
-		}
-
-		this.calculate_taxes_and_totals();
-	},
-
 	discount_percentage: function(doc, cdt, cdn) {
 		var item = frappe.get_doc(cdt, cdn);
 		item.discount_amount = 0.0;
diff --git a/erpnext/public/js/controllers/transaction.js b/erpnext/public/js/controllers/transaction.js
index 9351f6d..1c0abdf 100644
--- a/erpnext/public/js/controllers/transaction.js
+++ b/erpnext/public/js/controllers/transaction.js
@@ -649,6 +649,40 @@
 		}
 	},
 
+	price_list_rate: function(doc, cdt, cdn) {
+		var item = frappe.get_doc(cdt, cdn);
+		frappe.model.round_floats_in(item, ["price_list_rate", "discount_percentage"]);
+
+		// check if child doctype is Sales Order Item/Qutation Item and calculate the rate
+		if (in_list(["Quotation Item", "Sales Order Item", "Delivery Note Item", "Sales Invoice Item", "POS Invoice Item", "Purchase Invoice Item", "Purchase Order Item", "Purchase Receipt Item"]), cdt)
+			this.apply_pricing_rule_on_item(item);
+		else
+			item.rate = flt(item.price_list_rate * (1 - item.discount_percentage / 100.0),
+				precision("rate", item));
+
+		this.calculate_taxes_and_totals();
+	},
+
+	margin_rate_or_amount: function(doc, cdt, cdn) {
+		// calculated the revised total margin and rate on margin rate changes
+		let item = frappe.get_doc(cdt, cdn);
+		this.apply_pricing_rule_on_item(item);
+		this.calculate_taxes_and_totals();
+		cur_frm.refresh_fields();
+	},
+
+	margin_type: function(doc, cdt, cdn) {
+		// calculate the revised total margin and rate on margin type changes
+		let item = frappe.get_doc(cdt, cdn);
+		if (!item.margin_type) {
+			frappe.model.set_value(cdt, cdn, "margin_rate_or_amount", 0);
+		} else {
+			this.apply_pricing_rule_on_item(item, doc, cdt, cdn);
+			this.calculate_taxes_and_totals();
+			cur_frm.refresh_fields();
+		}
+	},
+
 	get_incoming_rate: function(item, posting_date, posting_time, voucher_type, company) {
 
 		let item_args = {
@@ -1030,7 +1064,7 @@
 	},
 
 	set_margin_amount_based_on_currency: function(exchange_rate) {
-		if (in_list(["Quotation", "Sales Order", "Delivery Note", "Sales Invoice"]), this.frm.doc.doctype) {
+		if (in_list(["Quotation", "Sales Order", "Delivery Note", "Sales Invoice", "Purchase Invoice", "Purchase Order", "Purchase Receipt"]), this.frm.doc.doctype) {
 			var me = this;
 			$.each(this.frm.doc.items || [], function(i, d) {
 				if(d.margin_type == "Amount") {
@@ -1280,10 +1314,10 @@
 	change_grid_labels: function(company_currency) {
 		var me = this;
 
-		this.frm.set_currency_labels(["base_rate", "base_net_rate", "base_price_list_rate", "base_amount", "base_net_amount"],
+		this.frm.set_currency_labels(["base_rate", "base_net_rate", "base_price_list_rate", "base_amount", "base_net_amount", "base_rate_with_margin"],
 			company_currency, "items");
 
-		this.frm.set_currency_labels(["rate", "net_rate", "price_list_rate", "amount", "net_amount", "stock_uom_rate"],
+		this.frm.set_currency_labels(["rate", "net_rate", "price_list_rate", "amount", "net_amount", "stock_uom_rate", "rate_with_margin"],
 			this.frm.doc.currency, "items");
 
 		if(this.frm.fields_dict["operations"]) {
@@ -1321,7 +1355,7 @@
 
 		// toggle columns
 		var item_grid = this.frm.fields_dict["items"].grid;
-		$.each(["base_rate", "base_price_list_rate", "base_amount"], function(i, fname) {
+		$.each(["base_rate", "base_price_list_rate", "base_amount", "base_rate_with_margin"], function(i, fname) {
 			if(frappe.meta.get_docfield(item_grid.doctype, fname))
 				item_grid.set_column_disp(fname, me.frm.doc.currency != company_currency);
 		});
@@ -1468,7 +1502,7 @@
 				});
 
 				// if doctype is Quotation Item / Sales Order Iten then add Margin Type and rate in item_list
-				if (in_list(["Quotation Item", "Sales Order Item", "Delivery Note Item", "Sales Invoice Item"]), d.doctype){
+				if (in_list(["Quotation Item", "Sales Order Item", "Delivery Note Item", "Sales Invoice Item",  "Purchase Invoice Item", "Purchase Order Item", "Purchase Receipt Item"]), d.doctype) {
 					item_list[0]["margin_type"] = d.margin_type;
 					item_list[0]["margin_rate_or_amount"] = d.margin_rate_or_amount;
 				}
diff --git a/erpnext/selling/doctype/quotation_item/quotation_item.json b/erpnext/selling/doctype/quotation_item/quotation_item.json
index a6785f7..8b53902 100644
--- a/erpnext/selling/doctype/quotation_item/quotation_item.json
+++ b/erpnext/selling/doctype/quotation_item/quotation_item.json
@@ -641,6 +641,7 @@
    "fieldname": "stock_uom_rate",
    "fieldtype": "Currency",
    "label": "Rate of Stock UOM",
+   "no_copy": 1,
    "options": "currency",
    "read_only": 1
   }
@@ -648,7 +649,7 @@
  "idx": 1,
  "istable": 1,
  "links": [],
- "modified": "2021-01-30 21:39:40.174551",
+ "modified": "2021-02-23 01:13:54.670763",
  "modified_by": "Administrator",
  "module": "Selling",
  "name": "Quotation Item",
diff --git a/erpnext/selling/doctype/sales_order_item/sales_order_item.json b/erpnext/selling/doctype/sales_order_item/sales_order_item.json
index 37e47a9..1e5590e 100644
--- a/erpnext/selling/doctype/sales_order_item/sales_order_item.json
+++ b/erpnext/selling/doctype/sales_order_item/sales_order_item.json
@@ -786,6 +786,7 @@
    "fieldname": "stock_uom_rate",
    "fieldtype": "Currency",
    "label": "Rate of Stock UOM",
+   "no_copy": 1,
    "options": "currency",
    "read_only": 1
   }
@@ -793,7 +794,7 @@
  "idx": 1,
  "istable": 1,
  "links": [],
- "modified": "2021-01-30 21:35:07.617320",
+ "modified": "2021-02-23 01:15:05.803091",
  "modified_by": "Administrator",
  "module": "Selling",
  "name": "Sales Order Item",
diff --git a/erpnext/selling/sales_common.js b/erpnext/selling/sales_common.js
index ce08464..0428573 100644
--- a/erpnext/selling/sales_common.js
+++ b/erpnext/selling/sales_common.js
@@ -127,20 +127,6 @@
 		this.set_dynamic_labels();
 	},
 
-	price_list_rate: function(doc, cdt, cdn) {
-		var item = frappe.get_doc(cdt, cdn);
-		frappe.model.round_floats_in(item, ["price_list_rate", "discount_percentage"]);
-
-		// check if child doctype is Sales Order Item/Qutation Item and calculate the rate
-		if(in_list(["Quotation Item", "Sales Order Item", "Delivery Note Item", "Sales Invoice Item", "POS Invoice Item"]), cdt)
-			this.apply_pricing_rule_on_item(item);
-		else
-			item.rate = flt(item.price_list_rate * (1 - item.discount_percentage / 100.0),
-				precision("rate", item));
-
-		this.calculate_taxes_and_totals();
-	},
-
 	discount_percentage: function(doc, cdt, cdn) {
 		var item = frappe.get_doc(cdt, cdn);
 		item.discount_amount = 0.0;
@@ -353,26 +339,6 @@
 		refresh_field('product_bundle_help');
 	},
 
-	margin_rate_or_amount: function(doc, cdt, cdn) {
-		// calculated the revised total margin and rate on margin rate changes
-		var item = locals[cdt][cdn];
-		this.apply_pricing_rule_on_item(item)
-		this.calculate_taxes_and_totals();
-		cur_frm.refresh_fields();
-	},
-
-	margin_type: function(doc, cdt, cdn){
-		// calculate the revised total margin and rate on margin type changes
-		var item = locals[cdt][cdn];
-		if(!item.margin_type) {
-			frappe.model.set_value(cdt, cdn, "margin_rate_or_amount", 0);
-		} else {
-			this.apply_pricing_rule_on_item(item, doc,cdt, cdn)
-			this.calculate_taxes_and_totals();
-			cur_frm.refresh_fields();
-		}
-	},
-
 	company_address: function() {
 		var me = this;
 		if(this.frm.doc.company_address) {
diff --git a/erpnext/stock/doctype/delivery_note_item/delivery_note_item.json b/erpnext/stock/doctype/delivery_note_item/delivery_note_item.json
index 1799624..b05090a 100644
--- a/erpnext/stock/doctype/delivery_note_item/delivery_note_item.json
+++ b/erpnext/stock/doctype/delivery_note_item/delivery_note_item.json
@@ -750,6 +750,7 @@
    "fieldname": "stock_uom_rate",
    "fieldtype": "Currency",
    "label": "Rate of Stock UOM",
+   "no_copy": 1,
    "options": "currency",
    "read_only": 1
   }
@@ -758,7 +759,7 @@
  "index_web_pages_for_search": 1,
  "istable": 1,
  "links": [],
- "modified": "2021-01-30 21:42:03.767968",
+ "modified": "2021-02-23 01:04:08.588104",
  "modified_by": "Administrator",
  "module": "Stock",
  "name": "Delivery Note Item",
diff --git a/erpnext/stock/doctype/purchase_receipt_item/purchase_receipt_item.json b/erpnext/stock/doctype/purchase_receipt_item/purchase_receipt_item.json
index 8974ad9..efe3642 100644
--- a/erpnext/stock/doctype/purchase_receipt_item/purchase_receipt_item.json
+++ b/erpnext/stock/doctype/purchase_receipt_item/purchase_receipt_item.json
@@ -37,10 +37,16 @@
   "returned_qty",
   "rate_and_amount",
   "price_list_rate",
-  "discount_percentage",
-  "discount_amount",
   "col_break3",
   "base_price_list_rate",
+  "discount_and_margin_section",
+  "margin_type",
+  "margin_rate_or_amount",
+  "rate_with_margin",
+  "column_break_37",
+  "discount_percentage",
+  "discount_amount",
+  "base_rate_with_margin",
   "sec_break1",
   "rate",
   "amount",
@@ -880,6 +886,7 @@
    "fieldname": "stock_uom_rate",
    "fieldtype": "Currency",
    "label": "Rate of Stock UOM",
+   "no_copy": 1,
    "options": "currency",
    "read_only": 1
   },
@@ -890,12 +897,55 @@
    "no_copy": 1,
    "print_hide": 1,
    "read_only": 1
+  },
+  {
+   "collapsible": 1,
+   "fieldname": "discount_and_margin_section",
+   "fieldtype": "Section Break",
+   "label": "Discount and Margin"
+  },
+  {
+   "depends_on": "price_list_rate",
+   "fieldname": "margin_type",
+   "fieldtype": "Select",
+   "label": "Margin Type",
+   "options": "\nPercentage\nAmount",
+   "print_hide": 1
+  },
+  {
+   "depends_on": "eval:doc.margin_type && doc.price_list_rate",
+   "fieldname": "margin_rate_or_amount",
+   "fieldtype": "Float",
+   "label": "Margin Rate or Amount",
+   "print_hide": 1
+  },
+  {
+   "depends_on": "eval:doc.margin_type && doc.price_list_rate && doc.margin_rate_or_amount",
+   "fieldname": "rate_with_margin",
+   "fieldtype": "Currency",
+   "label": "Rate With Margin",
+   "options": "currency",
+   "print_hide": 1,
+   "read_only": 1
+  },
+  {
+   "fieldname": "column_break_37",
+   "fieldtype": "Column Break"
+  },
+  {
+   "depends_on": "eval:doc.margin_type && doc.price_list_rate && doc.margin_rate_or_amount",
+   "fieldname": "base_rate_with_margin",
+   "fieldtype": "Currency",
+   "label": "Rate With Margin (Company Currency)",
+   "options": "Company:company:default_currency",
+   "print_hide": 1,
+   "read_only": 1
   }
  ],
  "idx": 1,
  "istable": 1,
  "links": [],
- "modified": "2021-01-30 21:44:06.918515",
+ "modified": "2021-02-23 00:59:14.360847",
  "modified_by": "Administrator",
  "module": "Stock",
  "name": "Purchase Receipt Item",