Identify the model you want to add the One2many field to. Let’s assume that you want to add a One2many field to the “appointment.pharmacy” model

from odoo import api, fields, models

class HospitalAppointment(models.Model):

    _name = ‘hospital.appointment’

    _description=’hospital.appointment’

    

   

    pharmacy_id = fields.One2many(‘appointment.pharmacy’, ‘appointment_id’, string=’pharmacy_id’ )

    

        

#if we want to create many2one field  first we can create a two model for relational fields in odoo

class AppointmentPharmacy(models.Model):

    _name = ‘appointment.pharmacy’

    _description = ‘appointment pharmacy’

  

    appointment_id = fields.Many2one(comodel_name=’hospital.appointment’, string=’appointment_id’)

# we can also create one xml file like appointment _view.xml

<?xml version=”1.0″ encoding=”utf-8″?>

<odoo>

       

     

        <record id=”view_hospital_appointment_form” model=”ir.ui.view”>

            <field name=”name”>hospital.appointment.form</field>

            <field name=”model”>hospital.appointment</field>

            <field name=”arch” type=”xml”>

                <form>

                               <notebook>

                           

    

                           <page string=’pharmacy’ name=’pharmacy’>

                            <field name=’pharmacy_id’>

                            

                            </field>

                           </page>

                        </notebook>

                        

                           

                      </sheet>

                      

                

                

                </form>

            </field>

        </record>

          

</odoo>

after that we can add xml file in __manifest__.py

{

    ‘name’: ‘Hospital Management’,

    ‘version’: ‘1.2’,

    ‘category’: ‘Hospital Management System’,

    ‘author’: ‘pythonpowers’,

   

    ‘sequence’: -100,

    ‘summary’: ‘HMS’,

    ‘description’: “””

This module contains all the common features of Hospital Managent System.

    “””,

    ‘depends’: [‘mail’,’base’,’product’],

    ‘data’: [

        ‘

        ‘views/appointment_view.xml’,

       

        

    ],

 

    ‘demo’: [],

    ‘application’:True,

        

    ‘installable’: True,

    ‘assets’: {

        

    },

    

    ‘license’: ‘LGPL-3’,

}

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