Tree Data Structure for Manager Employee Hierarchy Server Action

employee_hierarchy_tree_server_action.py

class HREmployee(models.Model):
    _inherit = 'hr.employee'

	@api.multi
	def load_employee_hierarchy(self):
		domain = []
		if self._context.get('params', False):
			params = self._context.get('params', False)
			if params.get('menu_id', False):
				raise ValidationError(
					"Attention:You are not allowed to access this page due to Security Policy. In case of any query, please contact ERP Admin or Configuration Manager.")
		else:
			return False

		view_id_tree = self.env['ir.ui.view'].search([('name', '=', 'hr.employee.hierarchy.tree')])
		user = self.env['res.users'].browse(self._uid)
		employee_pool = self.env['hr.employee']
		employee = employee_pool.search([('user_id', '=', user.id)])
		employee_ids = []
		if user.has_group('your_module.your_group_name_1'):
			# show all employees
			employee_ids = self.env['hr.employee'].search([]).ids
		if user.has_group('your_module.your_group_name_2'):
			# show user company employee
			employee_ids += self.env['hr.employee'].search([('company_id', '=', user.company_id.id)]).ids
		if user.has_group('base.group_user'):
			# show own record
			employee_ids += employee.ids
		employee_ids = list(set(employee_ids) - set([1]))
		return {
			'type': 'ir.actions.act_window',
			'res_model': 'hr.employee',
			'view_type': 'tree',
			'view_mode': 'tree',
			'view_id': view_id_tree.id,
			'views': [(view_id_tree[0].id, 'tree')],
			'target': 'current',
			'domain': [('parent_id','=',False),('id','in',employee_ids)]
		}

For details: http://learnopenerp.blogspot.com/2020/07/create-organization-employee-hierarchy-tree-view-in-odoo.html