I wrote the sequnce as I read in various posts, but the number does not load. Can someone help me?

in the view.xml:

<record id="seq_type_student_number" model="ir.sequence.type">
            <field name="name">Student Number</field>
            <field name="code">intrac.students.number</field>
        </record>

        <record id="seq_student_number" model="ir.sequence">
            <field name="name">Student Number</field>
            <field name="code">intrac.students.number</field>
            <field name="prefix">%(year)s%(month)s</field>
            <field name="padding">3</field>
        </record>

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and in the students.py

class intrac_students(osv.osv):
    _name = 'intrac.students'
    _columns = {
        'name': fields.many2one('res.partner', 'Student Name'),
        'student_number': fields.char('Student Number'),
        'student_image': fields.binary("Student Picture"),
        'student_id_type': fields.selection([('gid','Govt ID'),('passport','Passport')],'Identification Type'),
        'student_id_number': fields.char('ID Number', size=100),
        'student_gender': fields.selection([('m','Male'),('f','Female')], 'Gender'),
        'student_education_level': fields.selection([('hs','High School'),('c','College')], 'Education Level'),
        'student_notes': fields.one2many('intrac.students.notes', 'student_name', 'Student Notes'),
        'student_dob': fields.date('Date of Birth'),
    
    }
_defaults = {
        'student_number': lambda obj, cr, uid, context: obj.pool.get('ir.sequence').get(cr, uid, 'intrac.students.number'),
}
    
intrac_students()

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What am I missing?