I use Odoo14 community version,

I have a custom module that can create an invoice for student course registration, here is the code to create student invoice:

def create_invoice(self):
    invoice = self.env['account.move'].create({
        'move_type': 'out_invoice',
        'partner_id': self.student_id.partner_id.id,
        'invoice_line_ids': (
            {
                'product_id': self.course_id.product_id,
                'quantity': 1,
                'price_unit': self.course_id.product_id.lst_price,
                'tax_ids': False
            },
            {
                'product_id': self.subject_ids.product_id,
                'quantity': 1,
                'price_unit': self.subject_ids.product_id.lst_price,
                'tax_ids': False
            }
        )
    })

and I also have state for the student status, here is the code:

state = fields.Selection(string="Student Status", selection=[
    ('waiting', 'Waiting List'),
    ('has_been_contacted', 'Has been Contacted'),
    ('payment_process', 'Payment Process'),
    ('registered_student', 'Registered'),
    ('active_student', 'Active Student'),
    ('unactive_student', 'Unactive Student'),
], default='waiting')

when we triggered the create_invoice method on a button, the state will move to payment_process.

Now, I want if the created invoice payment state is paid, wether my user is access the invoice from my custom module or directly from Invoice/Accounting module, I want the state on my module is move automatically to registered_student.

My question are, how to do that?

Any help, source or tutorial how to do that will be very appreciated,

Edit:

I also create a field to save the registration ID on my models:

class AqurStudentCourse(models.Model):
    _name = "aqur.student.course"
    registration_invoice_id = fields.Integer(string='Registration Invoice ID')

Then I insert value on the registration_invoice_id when I create invoice:

def create_invoice(self):
    invoice = self.env['account.move'].create({
        'move_type': 'out_invoice',
        'partner_id': self.student_id.partner_id.id,
        # 'invoice_date': date_invoice,
        'invoice_line_ids': (
            {
                'product_id': self.course_id.product_id,
                'quantity': 1,
                'price_unit': self.course_id.product_id.lst_price,
                'tax_ids': False
            },
            {
                'product_id': self.subject_ids.product_id,
                'quantity': 1,
                'price_unit': self.subject_ids.product_id.lst_price,
                'tax_ids': False
            }
        )
    })
    self.registration_invoice_id = invoice.id

Here is the screenshot how I create the invoice from button:

When I create the Registration Fee button, it will create an invoice, then the state will move to Payment Process. And here is the created invoice:

Now , I want if the field invoice_payment_state from the  account.move  model if the  status  has been paid:

I want the state from my custom module automatically change to registered_student:

I try to apply the overide function code that suggest by @Niyas, here is the code:

def write(self, vals):
    invoice_payment_state = self.env['account.move'].search(
        [('partner_id.id', '=', self.student_id.partner_id.id), ('id', '=', self.registration_invoice_id),
         ('payment_state', '=', 'paid')])
    if 'state' in vals and vals['state']:
        if invoice_payment_state.payment_state:
            self.state = 'registered_student'
    return super(AqurStudentCourse, self).write(vals)

I call the above function from my AqurStudentCourse model, and I got the result from  the    invoice_payment_state.

But, when I test the function how  it  works, nothings is happen on my student course state when I try to Register Payment on the  Invoice and get the Invoice status to Paid.

Even, I got this error message when I try to change the state manually:

Traceback (most recent call last):
  File "/opt/odoo/odoo14/odoo/http.py", line 640, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "/opt/odoo/odoo14/odoo/http.py", line 316, in _handle_exception
    raise exception.with_traceback(None) from new_cause
RecursionError: maximum recursion depth exceeded while calling a Python object

So, what is wrong with my overide method?

Please, any help would be very appreciated.

Thank you,

Tri Nanda

EDIT 2:

I try to override the AccountMove models now with this code:

class AccountMove(models.Model):
    _inherit = "account.move"

    def write(self, vals):
        student_course_registration_id = self.env['aqur.student.course'].search(
            [('registration_invoice_id', '=', self.id)])

        course_registration_status = self.env['account.move'].search(
            [('id', '=', student_course_registration_id.registration_invoice_id)])

        if course_registration_status.payment_state == 'paid':
            self.env['aqur.student.course'].search(
                [('registration_invoice_id', '=', course_registration_status.id)]).write(
                {'state': 'registered_student'})

        return super(AccountMove, self).write(vals)

but, nothing is happen when the invoice has paid, the student course state still not update anythings, is there anothers solutions?

Thanks,

Tri Nanda