odoo_18_Education_management/models/school_course_assignment.py

from odoo import models, fields,api
from odoo.exceptions import UserError

class SchoolCourseAssignment(models.Model):
    _name = 'school.course.assignment'
    _description = 'Course Assignment'

    course_id = fields.Many2one('school.course', string='Course', ondelete='cascade')
    type = fields.Char(string='Assignment Type')
    weightage = fields.Float(string='Weightage')
    teacher = fields.Many2one('res.users', string='Teacher')
    class_id = fields.Many2one('school.class', string='Class')
    subject_id = fields.Many2one('school.subject', string='Subject', ondelete='cascade', required=True)
    assignment_count = fields.Integer(
    string="No. of Assignments",
    compute="_compute_assignment_count",
    store=False,
)
    
    is_completed = fields.Selection([
        ('yes', 'Completed'),
        ('no', 'Not Completed')
    ], string='Status', default='no')

    due_date = fields.Date(string='Due Date')

    @api.depends('course_id')
    def _compute_assignment_count(self):
        for rec in self:
            if rec.course_id:
                rec.assignment_count = self.search_count([('course_id', '=', rec.course_id.id)])
            else:
                rec.assignment_count = 0