Я написал эту простую модель в django-2, и когда я попытался мигрировать, я получил
ValueError: неверный литерал для int() с основанием 10: ''
from django.db import models
class Teacher(models.Model):
name = models.CharField(max_length=50)
user = models.IntegerField(default='',blank=True)
passcode = models.IntegerField(default='',blank=True)
def __str__(self):
return self.name
class Student(models.Model):
name = models.CharField(max_length=50)
user = models.IntegerField(default='', blank=True)
passcode = models.IntegerField(default='', blank=True)
teacher = models.ManyToManyField(Teacher)
def __str__(self):
return self.name
class Lesson (models.Model):
name = models.CharField(max_length=50)
cource = models.IntegerField(default='', blank=True)
teacher = models.ForeignKey("Teacher", on_delete=models.CASCADE)
Student = models.ManyToManyField(Student)
def __str__(self):
return self.name
class Score(models.Model):
score = models.FloatField(default='', blank=True)
student = models.ForeignKey(Student, on_delete=models.CASCADE)
lesson = models.ForeignKey(Lesson, on_delete=models.CASCADE)