当我试图执行Django models migrate命令python manage.py migrate时，我遇到了一个错误。如何解决这个错误？

Question

    from django.db import models
    from django.contrib.auth.models import User


    class Student(models.Model):
        rollno = models.CharField(max_length=13)
        name = models.OneToOneField(User, on_delete=models.CASCADE)
        dept = models.CharField(max_length=30)

        def __str__(self):
            return str(self.name)


    class Subject(models.Model):
        subname = models.CharField(max_length=50)
        deptname = models.CharField(max_length=50)

        def __str__(self):
            return str(self.subname)

PS C:\Users\Akhil\Desktop\django\studentportal> python manage.py migrate Operations to perform: Apply all migrations: admin, auth, contenttypes, sessions, studentapp Running migrations: Applying studentapp.0003_auto_20210602_0944...Traceback (most recent call last): File "C:\Users\Akhil\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\db\models\fields_init_.py", line 1823, in get_prep_value return int(value) ValueError: invalid literal for int() with base 10: 'CSE'

我试图删除我创建的模型。无论何时尝试迁移模型，删除后都会出现此错误。因此，我再次添加了相同的模型主题

Answer 1

看起来您已经将数据库中的一个字段更改为IntegerField，然后再更改回来？如果可以擦除数据库，我建议删除它，并进行迁移，然后重新运行./manage.py makemigrations和./manage.py migrate