Linking 2 docType not working

Hi,

i trying to create a library management using frappe and erpnext by following the tutorial on the link below
http://frappe.github.io/frappe/user/en/

so i created a doc types
Library Membership
Library Member
Library Transaction
Libary Mangement
Article

the details of the doctype Library Membership and Library Member (json) is given below
json of library_member.json
{

“allow_copy”: 0,
“allow_import”: 0,
“allow_rename”: 0,
“beta”: 0,
“creation”: “2017-03-03 12:03:54.485702”,
“custom”: 0,
“docstatus”: 0,
“doctype”: “DocType”,
“document_type”: “Document”,
“editable_grid”: 1,
“engine”: “InnoDB”,
“fields”: [
{
“allow_on_submit”: 0,
“bold”: 0,
“collapsible”: 0,
“columns”: 0,
“fieldname”: “first_name”,
“fieldtype”: “Data”,
“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”: “First Name”,
“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”: 1,
“search_index”: 0,
“set_only_once”: 0,
“unique”: 0
},
{
“allow_on_submit”: 0,
“bold”: 0,
“collapsible”: 0,
“columns”: 0,
“fieldname”: “last_name”,
“fieldtype”: “Data”,
“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”: “Last Name”,
“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,
“unique”: 0
},
{
“allow_on_submit”: 0,
“bold”: 0,
“collapsible”: 0,
“columns”: 0,
“fieldname”: “email_id”,
“fieldtype”: “Data”,
“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”: “Email Id”,
“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”: 1,
“search_index”: 0,
“set_only_once”: 0,
“unique”: 0
},
{
“allow_on_submit”: 0,
“bold”: 0,
“collapsible”: 0,
“columns”: 0,
“fieldname”: “phone”,
“fieldtype”: “Data”,
“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”: “Phone”,
“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”: 1,
“search_index”: 0,
“set_only_once”: 0,
“unique”: 0
},
{
“allow_on_submit”: 0,
“bold”: 0,
“collapsible”: 0,
“columns”: 0,
“fieldname”: “address”,
“fieldtype”: “Text”,
“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”: “Address”,
“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”: 1,
“search_index”: 0,
“set_only_once”: 0,
“unique”: 0
}
],
“hide_heading”: 0,
“hide_toolbar”: 0,
“idx”: 0,
“image_view”: 0,
“in_create”: 0,
“in_dialog”: 0,
“is_submittable”: 0,
“issingle”: 0,
“istable”: 0,
“max_attachments”: 0,
“modified”: “2017-03-03 14:35:03.725474”,
“modified_by”: “Administrator”,
“module”: “Libary Mangement”,
“name”: “Library Member”,
“name_case”: “”,
“owner”: “Administrator”,
“permissions”: [
{
“amend”: 0,
“apply_user_permissions”: 0,
“cancel”: 0,
“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”: 0,
“write”: 1
},
{
“amend”: 0,
“apply_user_permissions”: 0,
“cancel”: 0,
“create”: 1,
“delete”: 1,
“email”: 1,
“export”: 1,
“if_owner”: 0,
“import”: 0,
“permlevel”: 0,
“print”: 1,
“read”: 1,
“report”: 1,
“role”: “Librarian”,
“set_user_permissions”: 0,
“share”: 1,
“submit”: 0,
“write”: 1
},
{
“amend”: 0,
“apply_user_permissions”: 0,
“cancel”: 0,
“create”: 1,
“delete”: 1,
“email”: 1,
“export”: 1,
“if_owner”: 0,
“import”: 0,
“permlevel”: 0,
“print”: 1,
“read”: 1,
“report”: 1,
“role”: “Administrator”,
“set_user_permissions”: 0,
“share”: 1,
“submit”: 0,
“write”: 1
}
],
“quick_entry”: 1,
“read_only”: 0,
“read_only_onload”: 0,
“search_fields”: “first_name,last_name”,
“show_name_in_global_search”: 0,
“sort_field”: “modified”,
“sort_order”: “DESC”,
“track_changes”: 1,
“track_seen”: 0
}

json of library_membersip

{
“allow_copy”: 0,
“allow_import”: 0,
“allow_rename”: 0,
“beta”: 0,
“creation”: “2017-03-03 12:19:23.701381”,
“custom”: 0,
“docstatus”: 0,
“doctype”: “DocType”,
“document_type”: “Document”,
“editable_grid”: 1,
“engine”: “InnoDB”,
“fields”: [
{
“allow_on_submit”: 0,
“bold”: 0,
“collapsible”: 0,
“columns”: 0,
“fieldname”: “library_member”,
“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”: “Library Member”,
“length”: 0,
“no_copy”: 0,
“options”: “Library Member”,
“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,
“unique”: 0
},
{
“allow_on_submit”: 0,
“bold”: 0,
“collapsible”: 0,
“columns”: 0,
“fieldname”: “member_first_name”,
“fieldtype”: “Read Only”,
“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”: “Member First Name”,
“length”: 0,
“no_copy”: 0,
“options”: “library_member.first_name”,
“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,
“unique”: 0
},
{
“allow_on_submit”: 0,
“bold”: 0,
“collapsible”: 0,
“columns”: 0,
“fieldname”: “member_last_name”,
“fieldtype”: “Read Only”,
“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”: “Member Last Name”,
“length”: 0,
“no_copy”: 0,
“options”: “library_member.last_name”,
“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,
“unique”: 0
},
{
“allow_on_submit”: 0,
“bold”: 0,
“collapsible”: 0,
“columns”: 0,
“fieldname”: “from_date”,
“fieldtype”: “Date”,
“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”: “From Date”,
“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”: 1,
“search_index”: 0,
“set_only_once”: 0,
“unique”: 0
},
{
“allow_on_submit”: 0,
“bold”: 0,
“collapsible”: 0,
“columns”: 0,
“fieldname”: “to_date”,
“fieldtype”: “Date”,
“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”: “To Date”,
“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”: 1,
“search_index”: 0,
“set_only_once”: 0,
“unique”: 0
},
{
“allow_on_submit”: 0,
“bold”: 0,
“collapsible”: 0,
“columns”: 0,
“fieldname”: “paid”,
“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”: “paid”,
“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”: 1,
“search_index”: 0,
“set_only_once”: 0,
“unique”: 0
}
],
“hide_heading”: 0,
“hide_toolbar”: 0,
“idx”: 0,
“image_view”: 0,
“in_create”: 0,
“in_dialog”: 0,
“is_submittable”: 0,
“issingle”: 0,
“istable”: 0,
“max_attachments”: 0,
“modified”: “2017-03-03 14:45:25.245346”,
“modified_by”: “Administrator”,
“module”: “Libary Mangement”,
“name”: “Library Membership”,
“name_case”: “”,
“owner”: “Administrator”,
“permissions”: [
{
“amend”: 0,
“apply_user_permissions”: 0,
“cancel”: 0,
“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”: 0,
“write”: 1
},
{
“amend”: 0,
“apply_user_permissions”: 0,
“cancel”: 0,
“create”: 1,
“delete”: 1,
“email”: 1,
“export”: 1,
“if_owner”: 0,
“import”: 0,
“permlevel”: 0,
“print”: 1,
“read”: 1,
“report”: 1,
“role”: “Librarian”,
“set_user_permissions”: 0,
“share”: 1,
“submit”: 0,
“write”: 1
}
],
“quick_entry”: 1,
“read_only”: 0,
“read_only_onload”: 0,
“search_fields”: “”,
“show_name_in_global_search”: 0,
“sort_field”: “modified”,
“sort_order”: “DESC”,
“track_changes”: 1,
“track_seen”: 0
}

so i created new user as librarian and log out as administrator and logged in as new user

and i created new member and article then i tried to create new library_membership by clicking make new membership and then selected the membership number of previously created member it should automatically generate the first_name and last_name but it is does’t

please help me

thanks