scanning/model/scanning.py

Add a field in your model

name = fields.Char(string='Test ID', help="Lab Result ID", readonly="1",copy=False, index=True)


Add the following code in create function , if you want to increment sequence at the time of creating a record

@api.model 
def create(self, vals): 
     
    vals['name'] =self.env['ir.sequence'].next_by_code('patient.scanning.test')      

return super(PatientLabTest, self).create(vals)


scanning/data/scanning_data.xml

Create a XML Code to Declare Sequence

        <record id="seq_scanning_test" model="ir.sequence">
            <field name="name">Patient Scanning Test</field>
            <field name="code">patient.scanning.test</field>
            <field name="prefix">ST</field>
            <field name="padding">3</field>
        </record>

name   : Name of the Record
code   : Sequence Code
prefix : Prefix of the sequence Eg: ST001
padding: Size of Sequence


You can configure Sequence from Settings also

Activate Developer Mode

Settings > Technical > Sequence & Identifiers > Sequences