hi all , iam trying to add a extra field in hr_emp module , but when i add the server is not starting it shows me this error

  File "/odoo/odoo-server/odoo/fields.py", line 494, in _setup_related_full

    raise TypeError("Type of related field %s is inconsistent with %s" % (self, field))

TypeError: Type of related field hr.employee.employee_id is inconsistent with resource.resource.name - - -

emp.y:

employee_id = fields.Integer(string="Employee Id",related='resource_id.name', store=True, readonly=False, tracking=True )

emp_views.py:

                            <group>

                                <field name="employee_id" string="Employee Id" required="True"/> 

                            </group>

also when i try with 

employee_id = fields.Char(string="Employee Id", required = True) , it throws me an error than employee id didnt exit in form view

SOMEONE SOLVE THIS