from django.db import models

class StudentCompetency(models.Model):
    student = models.ForeignKey('Subscriptions.Student', on_delete=models.CASCADE, related_name='competency_scores')
    competency = models.ForeignKey('School.Competency', on_delete=models.CASCADE, related_name='student_scores')
    score = models.DecimalField(max_digits=5, decimal_places=2, null=True, blank=True)
    comment = models.TextField(blank=True, null=True)

    class Meta:
        unique_together = ('student', 'competency')

    def __str__(self):
        return f"{self.student} - {self.competency.name} - Score: {self.score}"