Apply discount to min price items

pos_next/fixtures/custom_field.json

@@ -511,5 +511,119 @@
   "translatable": 0,
   "unique": 0,
   "width": null
+ },
+ {
+  "allow_in_quick_entry": 0,
+  "allow_on_submit": 0,
+  "bold": 0,
+  "collapsible": 0,
+  "collapsible_depends_on": null,
+  "columns": 0,
+  "default": "",
+  "depends_on": "eval:doc.price_or_product_discount == 'Price'",
+  "description": "Apply discount on Min (cheapest) or Max (most expensive) item from items that have this pricing rule",
+  "docstatus": 0,
+  "doctype": "Custom Field",
+  "dt": "Pricing Rule",
+  "fetch_from": null,
+  "fetch_if_empty": 0,
+  "fieldname": "apply_discount_on_price",
+  "fieldtype": "Select",
+  "hidden": 0,
+  "hide_border": 0,
+  "hide_days": 0,
+  "hide_seconds": 0,
+  "ignore_user_permissions": 0,
+  "ignore_xss_filter": 0,
+  "in_global_search": 0,
+  "in_list_view": 0,
+  "in_preview": 0,
+  "in_standard_filter": 0,
+  "insert_after": "rate_or_discount",
+  "is_system_generated": 0,
+  "is_virtual": 0,
+  "label": "Apply Discount On",
+  "length": 0,
+  "link_filters": null,
+  "mandatory_depends_on": null,
+  "modified": "2025-01-01 00:00:00.000000",
+  "module": "POS Next",
+  "name": "Pricing Rule-apply_discount_on_price",
+  "no_copy": 0,
+  "non_negative": 0,
+  "options": "\nMin\nMax",
+  "permlevel": 0,
+  "placeholder": null,
+  "precision": "",
+  "print_hide": 0,
+  "print_hide_if_no_value": 0,
+  "print_width": null,
+  "read_only": 0,
+  "read_only_depends_on": null,
+  "report_hide": 0,
+  "reqd": 0,
+  "search_index": 0,
+  "show_dashboard": 0,
+  "sort_options": 0,
+  "translatable": 0,
+  "unique": 0,
+  "width": null
+ },
+ {
+  "allow_in_quick_entry": 0,
+  "allow_on_submit": 0,
+  "bold": 0,
+  "collapsible": 0,
+  "collapsible_depends_on": null,
+  "columns": 0,
+  "default": "0.0",
+  "depends_on": "eval:doc.apply_discount_on_price == 'Min' || doc.apply_discount_on_price == 'Max'",
+  "description": "Quantity limit for applying discount on Min/Max priced item. Leave 0 for no limit.",
+  "docstatus": 0,
+  "doctype": "Custom Field",
+  "dt": "Pricing Rule",
+  "fetch_from": null,
+  "fetch_if_empty": 0,
+  "fieldname": "min_or_max_discount_qty_limit",
+  "fieldtype": "Float",
+  "hidden": 0,
+  "hide_border": 0,
+  "hide_days": 0,
+  "hide_seconds": 0,
+  "ignore_user_permissions": 0,
+  "ignore_xss_filter": 0,
+  "in_global_search": 0,
+  "in_list_view": 0,
+  "in_preview": 0,
+  "in_standard_filter": 0,
+  "insert_after": "apply_discount_on_price",
+  "is_system_generated": 0,
+  "is_virtual": 0,
+  "label": "Min/Max Discount Qty Limit",
+  "length": 0,
+  "link_filters": null,
+  "mandatory_depends_on": null,
+  "modified": "2025-01-01 00:00:00.000000",
+  "module": "POS Next",
+  "name": "Pricing Rule-min_or_max_discount_qty_limit",
+  "no_copy": 0,
+  "non_negative": 1,
+  "options": null,
+  "permlevel": 0,
+  "placeholder": null,
+  "precision": "",
+  "print_hide": 0,
+  "print_hide_if_no_value": 0,
+  "print_width": null,
+  "read_only": 0,
+  "read_only_depends_on": null,
+  "report_hide": 0,
+  "reqd": 0,
+  "search_index": 0,
+  "show_dashboard": 0,
+  "sort_options": 0,
+  "translatable": 0,
+  "unique": 0,
+  "width": null
  }
 ]

pos_next/hooks.py

@@ -1,5 +1,5 @@
 from pos_next.utils import get_build_version
-
+import frappe
 app_name = "pos_next"
 app_title = "POS Next"
 app_publisher = "BrainWise"
@@ -100,7 +100,9 @@
 					"POS Profile-posa_cash_mode_of_payment",
 					"POS Profile-posa_allow_delete",
 					"POS Profile-posa_block_sale_beyond_available_qty",
-					"Mode of Payment-is_wallet_payment"
+					"Mode of Payment-is_wallet_payment",
+					"Pricing Rule-apply_discount_on_price",
+					"Pricing Rule-min_or_max_discount_qty_limit"
 				]
 			]
 		]
@@ -207,7 +209,8 @@
 	"Sales Invoice": {
 		"validate": [
 			"pos_next.api.sales_invoice_hooks.validate",
-			"pos_next.api.wallet.validate_wallet_payment"
+			"pos_next.api.wallet.validate_wallet_payment",
+			"pos_next.overrides.pricing_rule.apply_min_max_price_discounts"
 		],
 		"before_cancel": "pos_next.api.sales_invoice_hooks.before_cancel",
 		"on_submit": [
@@ -219,6 +222,18 @@
 	},
 	"POS Profile": {
 		"on_update": "pos_next.realtime_events.emit_pos_profile_updated_event"
+	},
+	"Sales Order": {
+		"validate": "pos_next.overrides.pricing_rule.apply_min_max_price_discounts"
+	},
+	"Quotation": {
+		"validate": "pos_next.overrides.pricing_rule.apply_min_max_price_discounts"
+	},
+	"Delivery Note": {
+		"validate": "pos_next.overrides.pricing_rule.apply_min_max_price_discounts"
+	},
+	"POS Invoice": {
+		"validate": "pos_next.overrides.pricing_rule.apply_min_max_price_discounts"
 	}
 }
 
@@ -237,7 +252,12 @@
 		"pos_next.tasks.branding_monitor.reset_tampering_counter",
 	],
 }
-
+try:
+	from erpnext.accounts.doctype.pricing_rule import pricing_rule as pricing_rule_module
+	from pos_next.overrides.pricing_rule import apply_price_discount_rule
+	pricing_rule_module.apply_price_discount_rule = apply_price_discount_rule
+except Exception as e:
+	frappe.log_error(frappe.get_traceback(), "Error in pricing rule module")
 # Testing
 # -------