Added Update Cost Center Number button and it's functionality
diff --git a/erpnext/accounts/doctype/cost_center/cost_center.js b/erpnext/accounts/doctype/cost_center/cost_center.js
index cbc37ff..a5bcaf4 100644
--- a/erpnext/accounts/doctype/cost_center/cost_center.js
+++ b/erpnext/accounts/doctype/cost_center/cost_center.js
@@ -15,8 +15,57 @@
 				}
 			}
 		})
+	},
+	refresh: function(frm) {
+		if (!frm.is_new()) {
+			frm.add_custom_button(__('Update Cost Center Number'), function () {
+				frm.trigger("update_cost_center_number");
+			});
+		}
+	},
+	update_cost_center_number: function(frm) {
+		var d = new frappe.ui.Dialog({
+			title: __('Update Cost Center Number'),
+			fields: [
+				{
+					"label": 'Cost Center Number',
+					"fieldname": "cost_center_number",
+					"fieldtype": "Data",
+					"reqd": 1
+				}
+			],
+			primary_action: function() {
+				var data = d.get_values();
+				if(data.cost_center_number === frm.doc.cost_center_number) {
+					d.hide();
+					return;
+				}
+				frappe.call({
+					method: "erpnext.accounts.doctype.cost_center.cost_center.update_number_field",
+					args: {
+						doctype_name: frm.doc.doctype,
+						name: frm.doc.name,
+						field_name: d.fields[0].fieldname,
+						field_value: data.cost_center_number,
+						company: frm.doc.company
+					},
+					callback: function(r) {
+						if(!r.exc) {
+							if(r.message) {
+								frappe.set_route("Form", "Cost Center", r.message);
+							} else {
+								me.set_value("cost_center_number", data.cost_center_number);
+							}
+							d.hide();
+						}
+					}
+				});
+			},
+			primary_action_label: __('Update')
+		});
+		d.show();
 	}
-})
+});
 
 cur_frm.cscript.refresh = function(doc, cdt, cdn) {
 	var intro_txt = '';
diff --git a/erpnext/accounts/doctype/cost_center/cost_center.json b/erpnext/accounts/doctype/cost_center/cost_center.json
index 9eddeec..4da21f1 100644
--- a/erpnext/accounts/doctype/cost_center/cost_center.json
+++ b/erpnext/accounts/doctype/cost_center/cost_center.json
@@ -1,5 +1,6 @@
 {
  "allow_copy": 1, 
+ "allow_guest_to_view": 0, 
  "allow_import": 1, 
  "allow_rename": 1, 
  "autoname": "field:cost_center_name", 
@@ -13,6 +14,7 @@
  "editable_grid": 0, 
  "fields": [
   {
+   "allow_bulk_edit": 0, 
    "allow_on_submit": 0, 
    "bold": 0, 
    "collapsible": 0, 
@@ -38,9 +40,11 @@
    "reqd": 0, 
    "search_index": 0, 
    "set_only_once": 0, 
+   "translatable": 0, 
    "unique": 0
   }, 
   {
+   "allow_bulk_edit": 0, 
    "allow_on_submit": 0, 
    "bold": 0, 
    "collapsible": 0, 
@@ -68,9 +72,42 @@
    "reqd": 1, 
    "search_index": 0, 
    "set_only_once": 0, 
+   "translatable": 0, 
    "unique": 0
   }, 
   {
+   "allow_bulk_edit": 0, 
+   "allow_on_submit": 0, 
+   "bold": 0, 
+   "collapsible": 0, 
+   "columns": 0, 
+   "fieldname": "cost_center_number", 
+   "fieldtype": "Data", 
+   "hidden": 0, 
+   "ignore_user_permissions": 0, 
+   "ignore_xss_filter": 0, 
+   "in_filter": 0, 
+   "in_global_search": 0, 
+   "in_list_view": 1, 
+   "in_standard_filter": 1, 
+   "label": "Cost Center Number", 
+   "length": 0, 
+   "no_copy": 0, 
+   "permlevel": 0, 
+   "precision": "", 
+   "print_hide": 0, 
+   "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, 
+   "translatable": 0, 
+   "unique": 0
+  }, 
+  {
+   "allow_bulk_edit": 0, 
    "allow_on_submit": 0, 
    "bold": 0, 
    "collapsible": 0, 
@@ -99,9 +136,11 @@
    "reqd": 1, 
    "search_index": 0, 
    "set_only_once": 0, 
+   "translatable": 0, 
    "unique": 0
   }, 
   {
+   "allow_bulk_edit": 0, 
    "allow_on_submit": 0, 
    "bold": 0, 
    "collapsible": 0, 
@@ -130,9 +169,11 @@
    "reqd": 1, 
    "search_index": 0, 
    "set_only_once": 0, 
+   "translatable": 0, 
    "unique": 0
   }, 
   {
+   "allow_bulk_edit": 0, 
    "allow_on_submit": 0, 
    "bold": 0, 
    "collapsible": 0, 
@@ -157,10 +198,12 @@
    "reqd": 0, 
    "search_index": 0, 
    "set_only_once": 0, 
+   "translatable": 0, 
    "unique": 0, 
    "width": "50%"
   }, 
   {
+   "allow_bulk_edit": 0, 
    "allow_on_submit": 0, 
    "bold": 0, 
    "collapsible": 0, 
@@ -188,9 +231,11 @@
    "reqd": 0, 
    "search_index": 0, 
    "set_only_once": 0, 
+   "translatable": 0, 
    "unique": 0
   }, 
   {
+   "allow_bulk_edit": 0, 
    "allow_on_submit": 0, 
    "bold": 0, 
    "collapsible": 0, 
@@ -218,9 +263,11 @@
    "reqd": 0, 
    "search_index": 1, 
    "set_only_once": 0, 
+   "translatable": 0, 
    "unique": 0
   }, 
   {
+   "allow_bulk_edit": 0, 
    "allow_on_submit": 0, 
    "bold": 0, 
    "collapsible": 0, 
@@ -248,9 +295,11 @@
    "reqd": 0, 
    "search_index": 1, 
    "set_only_once": 0, 
+   "translatable": 0, 
    "unique": 0
   }, 
   {
+   "allow_bulk_edit": 0, 
    "allow_on_submit": 0, 
    "bold": 0, 
    "collapsible": 0, 
@@ -279,22 +328,23 @@
    "reqd": 0, 
    "search_index": 0, 
    "set_only_once": 0, 
+   "translatable": 0, 
    "unique": 0
   }
  ], 
+ "has_web_view": 0, 
  "hide_heading": 0, 
  "hide_toolbar": 0, 
  "icon": "fa fa-money", 
  "idx": 1, 
  "image_view": 0, 
  "in_create": 0, 
- "in_dialog": 0, 
  "is_submittable": 0, 
  "issingle": 0, 
  "istable": 0, 
  "max_attachments": 0, 
  "menu_index": 0, 
- "modified": "2017-02-17 16:22:27.129572", 
+ "modified": "2018-04-26 15:26:25.325778", 
  "modified_by": "Administrator", 
  "module": "Accounts", 
  "name": "Cost Center", 
@@ -302,7 +352,6 @@
  "permissions": [
   {
    "amend": 0, 
-   "apply_user_permissions": 0, 
    "cancel": 0, 
    "create": 1, 
    "delete": 1, 
@@ -322,7 +371,6 @@
   }, 
   {
    "amend": 0, 
-   "apply_user_permissions": 0, 
    "cancel": 0, 
    "create": 0, 
    "delete": 0, 
@@ -342,7 +390,6 @@
   }, 
   {
    "amend": 0, 
-   "apply_user_permissions": 0, 
    "cancel": 0, 
    "create": 0, 
    "delete": 0, 
@@ -362,7 +409,6 @@
   }, 
   {
    "amend": 0, 
-   "apply_user_permissions": 0, 
    "cancel": 0, 
    "create": 0, 
    "delete": 0, 
@@ -382,7 +428,6 @@
   }, 
   {
    "amend": 0, 
-   "apply_user_permissions": 0, 
    "cancel": 0, 
    "create": 0, 
    "delete": 0, 
diff --git a/erpnext/accounts/doctype/cost_center/cost_center.py b/erpnext/accounts/doctype/cost_center/cost_center.py
index fe1e907..3fb1f75 100644
--- a/erpnext/accounts/doctype/cost_center/cost_center.py
+++ b/erpnext/accounts/doctype/cost_center/cost_center.py
@@ -4,6 +4,7 @@
 from __future__ import unicode_literals
 import frappe
 from frappe import _
+from frappe.utils import cint, cstr
 from frappe.utils.nestedset import NestedSet
 
 class CostCenter(NestedSet):
@@ -66,4 +67,47 @@
 				" - ".join(newdn.split(" - ")[:-1]))
 
 def on_doctype_update():
-	frappe.db.add_index("Cost Center", ["lft", "rgt"])
\ No newline at end of file
+	frappe.db.add_index("Cost Center", ["lft", "rgt"])
+
+def get_doc_name_autoname(field_value, doc_title, name, company):
+	if company:
+		name_split=name.split("-")
+		parts = [doc_title.strip(), name_split[len(name_split)-1].strip()]
+	else:
+		parts = [doc_title.strip()]
+	if cstr(field_value).strip():
+		parts.insert(0, cstr(field_value).strip())
+	return ' - '.join(parts)
+
+def validate_field_number(doctype_name, name, field_value, company, field_name):
+	if field_value:
+		if company:
+			doctype_with_same_number = frappe.db.get_value(doctype_name,
+				{field_name: field_value, "company": company, "name": ["!=", name]})
+		else:
+			doctype_with_same_number = frappe.db.get_value(doctype_name,
+				{field_name: field_value, "name": ["!=", name]})
+		if doctype_with_same_number:
+			frappe.throw(_("{0} Number {1} already used in account {2}")
+				.format(doctype_name, field_value, doctype_with_same_number))
+
+@frappe.whitelist()
+def update_number_field(doctype_name, name, field_name, field_value, company):
+
+	doc_title = frappe.db.get_value(doctype_name, name, frappe.scrub(doctype_name)+"_name")
+
+	validate_field_number(doctype_name, name, field_value, company, field_name)
+
+	frappe.db.set_value(doctype_name, name, field_name, field_value)
+
+	if doc_title[0].isdigit():
+		separator = " - " if " - " in doc_title else " "
+		doc_title = doc_title.split(separator, 1)[1]
+
+	frappe.db.set_value(doctype_name, name, frappe.scrub(doctype_name)+"_name", doc_title)
+
+	new_name = get_doc_name_autoname(field_value, doc_title, name, company)
+
+	if name != new_name:
+		frappe.rename_doc(doctype_name, name, new_name)
+		return new_name		
\ No newline at end of file