Base Model Sistem Absensi Siswa

models.py

from django.db import models
from django.utils import timezone


class Kelas(models.Model):
	kelas = models.CharField(max_length=32, unique=True)
	
	def __str__(self):
		return self.kelas
	
	class Meta:
		db_table = 'kelas'

class Siswa(models.Model):
	nis = models.CharField(max_length=4, unique=True)
	nama = models.CharField(max_length=50)
	kelas = models.ForeignKey(Kelas, related_name="kelas_siswa")
	
	def __str__(self):
		return self.nis
	
	class Meta:
		db_table = 'siswa'
	

class Semester(models.Model):
	PILIHAN_STATUS = (
		('Y', 'Ganjil'),
		('N', 'Genap'),
	)
	status = models.CharField(max_length=1, choices=PILIHAN_STATUS, default='Y')
	
	def __str__(self):
		return self.status
	
	class Meta:
		db_table = 'semester'
		

class Absens(models.Model):
	STATUS_ABSENSI = (
		('S', 'Sakit'),
		('I', 'Izin'),
		('A', 'Alpa'),
		('M', 'Masuk'),
	)
	nis = models.ForeignKey(Siswa)
	semester = models.ForeignKey(Semester)
	tanggal = models.DateField(default=timezone.now)
	absen = models.CharField(max_length=1, choices=STATUS_ABSENSI, default='M')
	
	def __str__(self):
		return self.nis.nama
	
	class Meta:
		db_table = 'absen'
		unique_together = ('nis', 'tanggal')