Hello everybody, I am new to odoo and I am working with version 13, I tried inheriting the hr.contact model to add terms but the result I get is that I can't add any term ...

here is the contact.py file  :    

rom odoo import models, fields


class HrContract(models.Model):
    _inherit = "hr.contract"
    term_ids = fields.One2many('hr.contract.type.term', 'contract_type_id')


class HrContractTypeTerm(models.Model):
    _name = 'hr.contract.type.term'
    _description = 'Employee Contract Types Terms'

    contract_type_id = fields.Many2one('hr.contract.type')
    sequence = fields.Integer(default=10)
    name = fields.Char(required=True)
    body = fields.Text(required=True)

    
        hr.contract.inherited.contract_type
        hr.contract
        
        
            


                       
                            
                                
                                    
                                    
                                    
                                
                                
                                    
                                        
                                        
                                        
                                    
                                
                            
                        

            




        
    

       
        Contract
        hr.contract
        tree,form


    




    

        
            


                       
                            
                                
                                    
                                    
                                    
                                
                                
                                    
                                        
                                        
                                        
                                    
                                
                            
                        

            


           

        
    

       



    

PS:  how can I add a screenshot here to explain more the problem