fix: job applicant fixes  (#22448)

* fix(validation): not two job offer should be allowed for single job_applicant

* fix: don't allow to create employee_onboarding without job offer

* fix: server side validation

* fix: requested changes
diff --git a/erpnext/hr/doctype/employee_onboarding/employee_onboarding.js b/erpnext/hr/doctype/employee_onboarding/employee_onboarding.js
index c128567..d6047e1 100644
--- a/erpnext/hr/doctype/employee_onboarding/employee_onboarding.js
+++ b/erpnext/hr/doctype/employee_onboarding/employee_onboarding.js
@@ -8,10 +8,20 @@
 		frm.add_fetch("employee_onboarding_template", "designation", "designation");
 		frm.add_fetch("employee_onboarding_template", "employee_grade", "employee_grade");
 
+
+		frm.set_query("job_applicant", function () {
+			return {
+				filters:{
+					"status": "Accepted",
+				}
+			};
+		});
+
 		frm.set_query('job_offer', function () {
 			return {
 				filters: {
-					'job_applicant': frm.doc.job_applicant
+					'job_applicant': frm.doc.job_applicant,
+					'docstatus': 1
 				}
 			};
 		});
diff --git a/erpnext/hr/doctype/employee_onboarding/employee_onboarding.json b/erpnext/hr/doctype/employee_onboarding/employee_onboarding.json
index 3b95cab..783c757 100644
--- a/erpnext/hr/doctype/employee_onboarding/employee_onboarding.json
+++ b/erpnext/hr/doctype/employee_onboarding/employee_onboarding.json
@@ -1,620 +1,203 @@
 {
- "allow_copy": 0, 
- "allow_guest_to_view": 0, 
- "allow_import": 0, 
- "allow_rename": 0, 
- "autoname": "HR-EMP-ONB-.YYYY.-.#####", 
- "beta": 0, 
- "creation": "2018-05-09 04:57:20.016220", 
- "custom": 0, 
- "docstatus": 0, 
- "doctype": "DocType", 
- "document_type": "", 
- "editable_grid": 1, 
- "engine": "InnoDB", 
+ "actions": [],
+ "autoname": "HR-EMP-ONB-.YYYY.-.#####",
+ "creation": "2018-05-09 04:57:20.016220",
+ "doctype": "DocType",
+ "editable_grid": 1,
+ "engine": "InnoDB",
+ "field_order": [
+  "job_applicant",
+  "job_offer",
+  "employee_name",
+  "employee",
+  "date_of_joining",
+  "boarding_status",
+  "notify_users_by_email",
+  "column_break_7",
+  "employee_onboarding_template",
+  "company",
+  "department",
+  "designation",
+  "employee_grade",
+  "project",
+  "table_for_activity",
+  "activities",
+  "amended_from"
+ ],
  "fields": [
   {
-   "allow_bulk_edit": 0, 
-   "allow_in_quick_entry": 0, 
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 0, 
-   "fieldname": "job_applicant", 
-   "fieldtype": "Link", 
-   "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": "Job Applicant", 
-   "length": 0, 
-   "no_copy": 0, 
-   "options": "Job Applicant", 
-   "permlevel": 0, 
-   "precision": "", 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "read_only": 0, 
-   "remember_last_selected_value": 0, 
-   "report_hide": 0, 
-   "reqd": 1, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "translatable": 0, 
-   "unique": 0
-  }, 
-  {
-   "allow_bulk_edit": 0, 
-   "allow_in_quick_entry": 0, 
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 0, 
-   "fieldname": "job_offer", 
-   "fieldtype": "Link", 
-   "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": "Job Offer", 
-   "length": 0, 
-   "no_copy": 0, 
-   "options": "Job Offer", 
-   "permlevel": 0, 
-   "precision": "", 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "read_only": 0, 
-   "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_in_quick_entry": 0, 
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 0, 
-   "fetch_from": "job_applicant.applicant_name", 
-   "fieldname": "employee_name", 
-   "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": 0, 
-   "label": "Employee Name", 
-   "length": 0, 
-   "no_copy": 0, 
-   "options": "", 
-   "permlevel": 0, 
-   "precision": "", 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "read_only": 0, 
-   "remember_last_selected_value": 0, 
-   "report_hide": 0, 
-   "reqd": 1, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "translatable": 0, 
-   "unique": 0
-  }, 
-  {
-   "allow_bulk_edit": 0, 
-   "allow_in_quick_entry": 0, 
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 0, 
-   "fieldname": "employee", 
-   "fieldtype": "Link", 
-   "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": "Employee", 
-   "length": 0, 
-   "no_copy": 0, 
-   "options": "Employee", 
-   "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_in_quick_entry": 0, 
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 0, 
-   "fieldname": "date_of_joining", 
-   "fieldtype": "Date", 
-   "hidden": 0, 
-   "ignore_user_permissions": 0, 
-   "ignore_xss_filter": 0, 
-   "in_filter": 0, 
-   "in_global_search": 0, 
-   "in_list_view": 1, 
-   "in_standard_filter": 0, 
-   "label": "Date of Joining", 
-   "length": 0, 
-   "no_copy": 0, 
-   "permlevel": 0, 
-   "precision": "", 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "read_only": 0, 
-   "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_in_quick_entry": 0, 
-   "allow_on_submit": 1, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 0, 
-   "fieldname": "boarding_status", 
-   "fieldtype": "Select", 
-   "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": "Status", 
-   "length": 0, 
-   "no_copy": 0, 
-   "options": "\nPending\nIn Process\nCompleted", 
-   "permlevel": 0, 
-   "precision": "", 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "read_only": 0, 
-   "remember_last_selected_value": 0, 
-   "report_hide": 0, 
-   "reqd": 0, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "translatable": 0, 
-   "unique": 0
+   "fieldname": "job_applicant",
+   "fieldtype": "Link",
+   "label": "Job Applicant",
+   "options": "Job Applicant",
+   "reqd": 1,
+   "show_days": 1,
+   "show_seconds": 1
   },
   {
-    "allow_bulk_edit": 0,
-    "allow_in_quick_entry": 0,
-    "allow_on_submit": 1,
-    "bold": 0,
-    "collapsible": 0,
-    "columns": 0,
-    "fieldname": "notify_users_by_email",
-    "fieldtype": "Check",
-    "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": "Notify users by email",
-    "length": 0,
-    "no_copy": 0,
-    "permlevel": 0,
-    "precision": "",
-    "print_hide": 0,
-    "print_hide_if_no_value": 0,
-    "read_only": 0,
-    "remember_last_selected_value": 0,
-    "report_hide": 0,
-    "reqd": 0,
-    "search_index": 0,
-    "set_only_once": 0,
-    "translatable": 0,
-    "unique": 0
-   },
+   "fieldname": "job_offer",
+   "fieldtype": "Link",
+   "label": "Job Offer",
+   "options": "Job Offer",
+   "reqd": 1,
+   "show_days": 1,
+   "show_seconds": 1
+  },
   {
-   "allow_bulk_edit": 0,
-   "allow_in_quick_entry": 0,
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 0, 
-   "fieldname": "column_break_7", 
-   "fieldtype": "Column Break", 
-   "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, 
-   "length": 0, 
-   "no_copy": 0, 
-   "permlevel": 0, 
-   "precision": "", 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "read_only": 0, 
-   "remember_last_selected_value": 0, 
-   "report_hide": 0, 
-   "reqd": 0, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "translatable": 0, 
-   "unique": 0
-  }, 
+   "fetch_from": "job_applicant.applicant_name",
+   "fieldname": "employee_name",
+   "fieldtype": "Data",
+   "in_list_view": 1,
+   "label": "Employee Name",
+   "reqd": 1,
+   "show_days": 1,
+   "show_seconds": 1
+  },
   {
-   "allow_bulk_edit": 0, 
-   "allow_in_quick_entry": 0, 
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 0, 
-   "fieldname": "employee_onboarding_template", 
-   "fieldtype": "Link", 
-   "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": "Employee Onboarding Template", 
-   "length": 0, 
-   "no_copy": 0, 
-   "options": "Employee Onboarding Template", 
-   "permlevel": 0, 
-   "precision": "", 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "read_only": 0, 
-   "remember_last_selected_value": 0, 
-   "report_hide": 0, 
-   "reqd": 0, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "translatable": 0, 
-   "unique": 0
-  }, 
+   "fieldname": "employee",
+   "fieldtype": "Link",
+   "label": "Employee",
+   "options": "Employee",
+   "read_only": 1,
+   "show_days": 1,
+   "show_seconds": 1
+  },
   {
-   "allow_bulk_edit": 0, 
-   "allow_in_quick_entry": 0, 
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 0, 
-   "fieldname": "company", 
-   "fieldtype": "Link", 
-   "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": "Company", 
-   "length": 0, 
-   "no_copy": 0, 
-   "options": "Company", 
-   "permlevel": 0, 
-   "precision": "", 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "read_only": 0, 
-   "remember_last_selected_value": 0, 
-   "report_hide": 0, 
-   "reqd": 0, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "translatable": 0, 
-   "unique": 0
-  }, 
+   "fieldname": "date_of_joining",
+   "fieldtype": "Date",
+   "in_list_view": 1,
+   "label": "Date of Joining",
+   "show_days": 1,
+   "show_seconds": 1
+  },
   {
-   "allow_bulk_edit": 0, 
-   "allow_in_quick_entry": 0, 
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 0, 
-   "fieldname": "department", 
-   "fieldtype": "Link", 
-   "hidden": 0, 
-   "ignore_user_permissions": 0, 
-   "ignore_xss_filter": 0, 
-   "in_filter": 0, 
-   "in_global_search": 0, 
-   "in_list_view": 1, 
-   "in_standard_filter": 0, 
-   "label": "Department", 
-   "length": 0, 
-   "no_copy": 0, 
-   "options": "Department", 
-   "permlevel": 0, 
-   "precision": "", 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "read_only": 0, 
-   "remember_last_selected_value": 0, 
-   "report_hide": 0, 
-   "reqd": 0, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "translatable": 0, 
-   "unique": 0
-  }, 
+   "allow_on_submit": 1,
+   "fieldname": "boarding_status",
+   "fieldtype": "Select",
+   "label": "Status",
+   "options": "\nPending\nIn Process\nCompleted",
+   "show_days": 1,
+   "show_seconds": 1
+  },
   {
-   "allow_bulk_edit": 0, 
-   "allow_in_quick_entry": 0, 
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 0, 
-   "fieldname": "designation", 
-   "fieldtype": "Link", 
-   "hidden": 0, 
-   "ignore_user_permissions": 0, 
-   "ignore_xss_filter": 0, 
-   "in_filter": 0, 
-   "in_global_search": 0, 
-   "in_list_view": 1, 
-   "in_standard_filter": 0, 
-   "label": "Designation", 
-   "length": 0, 
-   "no_copy": 0, 
-   "options": "Designation", 
-   "permlevel": 0, 
-   "precision": "", 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "read_only": 0, 
-   "remember_last_selected_value": 0, 
-   "report_hide": 0, 
-   "reqd": 0, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "translatable": 0, 
-   "unique": 0
-  }, 
+   "allow_on_submit": 1,
+   "default": "0",
+   "fieldname": "notify_users_by_email",
+   "fieldtype": "Check",
+   "label": "Notify users by email",
+   "show_days": 1,
+   "show_seconds": 1
+  },
   {
-   "allow_bulk_edit": 0, 
-   "allow_in_quick_entry": 0, 
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 0, 
-   "fieldname": "employee_grade", 
-   "fieldtype": "Link", 
-   "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": "Employee Grade", 
-   "length": 0, 
-   "no_copy": 0, 
-   "options": "Employee Grade", 
-   "permlevel": 0, 
-   "precision": "", 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "read_only": 0, 
-   "remember_last_selected_value": 0, 
-   "report_hide": 0, 
-   "reqd": 0, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "translatable": 0, 
-   "unique": 0
-  }, 
+   "fieldname": "column_break_7",
+   "fieldtype": "Column Break",
+   "show_days": 1,
+   "show_seconds": 1
+  },
   {
-   "allow_bulk_edit": 0, 
-   "allow_in_quick_entry": 0, 
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 0, 
-   "fieldname": "project", 
-   "fieldtype": "Link", 
-   "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": "Project", 
-   "length": 0, 
-   "no_copy": 0, 
-   "options": "Project", 
-   "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
-  }, 
+   "fieldname": "employee_onboarding_template",
+   "fieldtype": "Link",
+   "label": "Employee Onboarding Template",
+   "options": "Employee Onboarding Template",
+   "show_days": 1,
+   "show_seconds": 1
+  },
   {
-   "allow_bulk_edit": 0, 
-   "allow_in_quick_entry": 0, 
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 0, 
-   "fieldname": "table_for_activity", 
-   "fieldtype": "Section Break", 
-   "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": "", 
-   "length": 0, 
-   "no_copy": 0, 
-   "permlevel": 0, 
-   "precision": "", 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "read_only": 0, 
-   "remember_last_selected_value": 0, 
-   "report_hide": 0, 
-   "reqd": 0, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "translatable": 0, 
-   "unique": 0
-  }, 
+   "fieldname": "company",
+   "fieldtype": "Link",
+   "label": "Company",
+   "options": "Company",
+   "show_days": 1,
+   "show_seconds": 1
+  },
   {
-   "allow_bulk_edit": 0, 
-   "allow_in_quick_entry": 0, 
-   "allow_on_submit": 1, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 0, 
-   "fieldname": "activities", 
-   "fieldtype": "Table", 
-   "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": "Activities", 
-   "length": 0, 
-   "no_copy": 0, 
-   "options": "Employee Boarding Activity", 
-   "permlevel": 0, 
-   "precision": "", 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "read_only": 0, 
-   "remember_last_selected_value": 0, 
-   "report_hide": 0, 
-   "reqd": 0, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "translatable": 0, 
-   "unique": 0
-  }, 
+   "fieldname": "department",
+   "fieldtype": "Link",
+   "in_list_view": 1,
+   "label": "Department",
+   "options": "Department",
+   "show_days": 1,
+   "show_seconds": 1
+  },
   {
-   "allow_bulk_edit": 0, 
-   "allow_in_quick_entry": 0, 
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 0, 
-   "fieldname": "amended_from", 
-   "fieldtype": "Link", 
-   "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": "Amended From", 
-   "length": 0, 
-   "no_copy": 1, 
-   "options": "Employee Onboarding", 
-   "permlevel": 0, 
-   "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, 
-   "translatable": 0, 
-   "unique": 0
+   "fieldname": "designation",
+   "fieldtype": "Link",
+   "in_list_view": 1,
+   "label": "Designation",
+   "options": "Designation",
+   "show_days": 1,
+   "show_seconds": 1
+  },
+  {
+   "fieldname": "employee_grade",
+   "fieldtype": "Link",
+   "label": "Employee Grade",
+   "options": "Employee Grade",
+   "show_days": 1,
+   "show_seconds": 1
+  },
+  {
+   "fieldname": "project",
+   "fieldtype": "Link",
+   "label": "Project",
+   "options": "Project",
+   "read_only": 1,
+   "show_days": 1,
+   "show_seconds": 1
+  },
+  {
+   "fieldname": "table_for_activity",
+   "fieldtype": "Section Break",
+   "show_days": 1,
+   "show_seconds": 1
+  },
+  {
+   "allow_on_submit": 1,
+   "fieldname": "activities",
+   "fieldtype": "Table",
+   "label": "Activities",
+   "options": "Employee Boarding Activity",
+   "show_days": 1,
+   "show_seconds": 1
+  },
+  {
+   "fieldname": "amended_from",
+   "fieldtype": "Link",
+   "label": "Amended From",
+   "no_copy": 1,
+   "options": "Employee Onboarding",
+   "print_hide": 1,
+   "read_only": 1,
+   "show_days": 1,
+   "show_seconds": 1
   }
- ], 
- "has_web_view": 0, 
- "hide_heading": 0, 
- "hide_toolbar": 0, 
- "idx": 0, 
- "image_view": 0, 
- "in_create": 0, 
- "is_submittable": 1, 
- "issingle": 0, 
- "istable": 0, 
- "max_attachments": 0, 
- "modified": "2019-08-01 16:15:55.968224", 
- "modified_by": "Administrator", 
- "module": "HR", 
- "name": "Employee Onboarding", 
- "name_case": "", 
- "owner": "Administrator", 
+ ],
+ "is_submittable": 1,
+ "links": [],
+ "modified": "2020-06-25 15:22:24.923835",
+ "modified_by": "Administrator",
+ "module": "HR",
+ "name": "Employee Onboarding",
+ "owner": "Administrator",
  "permissions": [
   {
-   "amend": 1, 
-   "cancel": 1, 
-   "create": 1, 
-   "delete": 1, 
-   "email": 1, 
-   "export": 1, 
-   "if_owner": 0, 
-   "import": 0, 
-   "permlevel": 0, 
-   "print": 1, 
-   "read": 1, 
-   "report": 1, 
-   "role": "System Manager", 
-   "set_user_permissions": 0, 
-   "share": 1, 
-   "submit": 1, 
+   "amend": 1,
+   "cancel": 1,
+   "create": 1,
+   "delete": 1,
+   "email": 1,
+   "export": 1,
+   "print": 1,
+   "read": 1,
+   "report": 1,
+   "role": "System Manager",
+   "share": 1,
+   "submit": 1,
    "write": 1
   }
- ], 
- "quick_entry": 0, 
- "read_only": 0, 
- "read_only_onload": 0, 
- "show_name_in_global_search": 0, 
- "sort_field": "modified", 
- "sort_order": "DESC", 
- "title_field": "employee_name", 
- "track_changes": 1, 
- "track_seen": 0, 
- "track_views": 0
+ ],
+ "sort_field": "modified",
+ "sort_order": "DESC",
+ "title_field": "employee_name",
+ "track_changes": 1
 }
\ No newline at end of file
diff --git a/erpnext/hr/doctype/employee_onboarding/employee_onboarding.py b/erpnext/hr/doctype/employee_onboarding/employee_onboarding.py
index 19ff3bd..6cc2bf5 100644
--- a/erpnext/hr/doctype/employee_onboarding/employee_onboarding.py
+++ b/erpnext/hr/doctype/employee_onboarding/employee_onboarding.py
@@ -13,6 +13,12 @@
 class EmployeeOnboarding(EmployeeBoardingController):
 	def validate(self):
 		super(EmployeeOnboarding, self).validate()
+		self.validate_duplicate_employee_onboarding()
+
+	def validate_duplicate_employee_onboarding(self):
+		emp_onboarding = frappe.db.exists("Employee Onboarding",{"job_applicant": self.job_applicant})
+		if emp_onboarding and emp_onboarding != self.name:
+			frappe.throw(_("Employee Onboarding: {0} is already for Job Applicant: {1}").format(frappe.bold(emp_onboarding), frappe.bold(self.job_applicant)))
 
 	def validate_employee_creation(self):
 		if self.docstatus != 1:
diff --git a/erpnext/hr/doctype/job_applicant/job_applicant.js b/erpnext/hr/doctype/job_applicant/job_applicant.js
index 05071e1..c625155 100644
--- a/erpnext/hr/doctype/job_applicant/job_applicant.js
+++ b/erpnext/hr/doctype/job_applicant/job_applicant.js
@@ -10,10 +10,14 @@
 	refresh: function(frm) {
 		if (!frm.doc.__islocal) {
 			if (frm.doc.__onload && frm.doc.__onload.job_offer) {
+				$('[data-doctype="Employee Onboarding"]').find("button").show();
+				$('[data-doctype="Job Offer"]').find("button").hide();
 				frm.add_custom_button(__("Job Offer"), function() {
 					frappe.set_route("Form", "Job Offer", frm.doc.__onload.job_offer);
 				}, __("View"));
 			} else {
+				$('[data-doctype="Employee Onboarding"]').find("button").hide();
+				$('[data-doctype="Job Offer"]').find("button").show();
 				frm.add_custom_button(__("Job Offer"), function() {
 					frappe.route_options = {
 						"job_applicant": frm.doc.name,
diff --git a/erpnext/hr/doctype/job_offer/job_offer.py b/erpnext/hr/doctype/job_offer/job_offer.py
index f9ee44a..e7e1a37 100644
--- a/erpnext/hr/doctype/job_offer/job_offer.py
+++ b/erpnext/hr/doctype/job_offer/job_offer.py
@@ -15,6 +15,9 @@
 
 	def validate(self):
 		self.validate_vacancies()
+		job_offer = frappe.db.exists("Job Offer",{"job_applicant": self.job_applicant})
+		if job_offer and job_offer != self.name:
+			frappe.throw(_("Job Offer: {0} is already for Job Applicant: {1}").format(frappe.bold(job_offer), frappe.bold(self.job_applicant)))
 
 	def validate_vacancies(self):
 		staffing_plan = get_staffing_plan_detail(self.designation, self.company, self.offer_date)