fix: force fetch updates for subcription

(cherry picked from commit 1ef890d)

erpnext/accounts/doctype/subscription/subscription.js

@@ -38,6 +38,12 @@ frappe.ui.form.on("Subscription", {
 				__("Actions")
 			);
 
+			frm.add_custom_button(
+				__("Force Fetch Subscription Updates"),
+				() => frm.trigger("force_fetch_subscription_updates"),
+				__("Actions")
+			);
+
 			frm.add_custom_button(
 				__("Cancel Subscription"),
 				() => frm.trigger("cancel_this_subscription"),
@@ -82,4 +88,11 @@ frappe.ui.form.on("Subscription", {
 			}
 		});
 	},
+	force_fetch_subscription_updates: function (frm) {
+		frm.call("force_fetch_subscription_updates").then((r) => {
+			if (!r.exec) {
+				frm.reload_doc();
+			}
+		});
+	},
 });

erpnext/accounts/doctype/subscription/subscription.py

@@ -717,6 +717,25 @@ def restart_subscription(self, posting_date: DateTimeLikeObject | None = None) -
 		self.update_subscription_period(posting_date or nowdate())
 		self.save()
 
+	@frappe.whitelist()
+	def force_fetch_subscription_updates(self):
+		"""
+		Process Subscription and create Invoices even if current date doesn't lie between current_invoice_start and currenct_invoice_end
+		It makes use of 'Proces Subscription' to force processing in a specific 'posting_date'
+		"""
+		processing_date = None
+		if self.generate_invoice_at == "Beginning of the current subscription period":
+			processing_date = self.current_invoice_start
+		elif self.generate_invoice_at == "End of the current subscription period":
+			processing_date = self.current_invoice_end
+		elif self.generate_invoice_at == "Days before the current subscription period":
+			processing_date = add_days(self.current_invoice_start, -self.number_of_days)
+
+		process_subscription = frappe.new_doc("Process Subscription")
+		process_subscription.posting_date = processing_date
+		process_subscription.subscription = self.name
+		process_subscription.save().submit()
+
 
 def is_prorate() -> int:
 	return cint(frappe.db.get_single_value("Subscription Settings", "prorate"))