11_onChangeComputed.md

On change function

• If we choose a patient name while creating a new appointment, it will automatically fill the Note field and if we remove the patient it will be empty. This task is done using onChange function.

  @api.onchange('patient_id')
    def _change_appointment_note(self):
        if self.patient_id:
            if not self.note:
                self.note = "New appointment"
        else:
            self.note = ""

  

  • Check out the code for onChange

• If we set Note as a readonly field and save it will not store the data of Note. To save we have to use force_save="1" in the form view of the Note field.

  <field name="note" readonly="1" force_save="1"/>

  • Check out the code

Computed fields

• To compute the appointment of an individual doctor we have to find in the appointment table based on doctor id. Here appointed_doctor_id will come from the appointment model which is a Many2one field.

  total_appointments = fields.Integer(string='No. of appointments', compute='_compute_appointments')
  
  # compute appointments of individual doctor
  def _compute_appointments(self):
      for record in self:
          record.total_appointments = self.env['kmhospital.appointment'].search_count(
              [('appointed_doctor_id', '=', record.id)])

• We have use a for loop in the computed field as self contains multiple values otherwise it will arise Singleton Error.

• In the view file we have to add the field of total_appointments inside the Patient List tab.

  <group string="No. of Appointments:">
      <h2>
          <field name="total_appointments"/>
      </h2>
  </group>

  

  • Check out the code

Task

• Try to compute patients appointment like doctor.
  • Check out the code

🚀 Happy Coding ! 🔥