XML Parsing Error while Upgrading Custom Module - odoo

Question

I'm new in Odoo. Created a simple custom module. It was working fine till when I've splitted xml file into two. Its giving below error while trying to upgrade my custom module:
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "D:\Odoo\Odoo_15\odoo\odoo\http.py", line 643, in _handle_exception
return super(JsonRequest, self)._handle_exception(exception)
File "D:\Odoo\Odoo_15\odoo\odoo\http.py", line 301, in _handle_exception
raise exception.with_traceback(None) from new_cause
odoo.tools.convert.ParseError: while parsing file:/d:/odoo/odoo_15/custom_addons/om_hospital/views/menu.xml:17, somewhere inside
<menuitem id="menu_patient" name="Patient" action="action_hospital_patient" parent="menu_patient_master" sequence="0"/>
Here are codes:
manifest.py:
{
'name': 'Custom Hospital Management by Milon',
'version': '1.0.0',
'category': 'Hospital Maanagement',
'author': 'Milon Sarker',
'summary': 'Its a custom system',
'description': 'Its a custom system bro',
'depends': [],
'data': [
'views/menu.xml',
'views/patient_view.xml',
],
'installable': True,
'auto_install': False,
'application': True,
'sequence': -100
}
model : patient.py:
from odoo import api, fields, models
class hospitalPatient(models.Model):
_name = 'hospital.patient'
_description = 'Hospital Patient'
name = fields.Char(string = 'Name')
age = fields.Integer(string = "Age")
gender = fields.Selection([('male','Male'), ('female', 'Female')], string = "Gender")
menu.xml:
<?xml version="1.0" encoding="utf-8" ?>
<odoo>
<menuitem id = "menu_hospital_root"
name = "Hospital"
sequence = "0"
/>
<menuitem id = "menu_patient_master"
name = "Patient Details"
parent = "menu_hospital_root"
sequence = "0"
/>
<menuitem id="menu_patient"
name="Patient"
action="action_hospital_patient"
parent="menu_patient_master"
sequence="0"
/>
</odoo>
patient_view.xml:
<?xml version="1.0" encoding="utf-8" ?>
<odoo>
<record id = "action_hospital_patient" model = "ir.actions.act_window">
<field name="name">Patients</field>
<field name="type">ir.actions.act_window</field>
<field name="res_model">hospital.patient</field>
<field name="view_mode">tree,form,</field>
<field name="context">{}</field>
<field name="help" type = "html">
<p class = "o_view_nocontent_smiling_face">
Create your first patient!
</p>
</field>
</record>
</odoo>

Answer 1

From menuitem documentation:
actionif specified, the action attribute should be the external id of an action to execute when the menu is open.
Use the external id in the last menu item for the action:
om_hospital.action_hospital_patient
When loading the menu item, odoo will try to get the action database id if the action is set and valid.
You should load the menu.xml after the patient_view.xml, update the data entry in the manifest file to the following:
'data': [
'views/patient_view.xml',
'views/menu.xml',
],