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Django: You are trying to add a non-nullable field 'name' to mainnav without a default; we

2021-07-01 17:00:29 作者：互联网

错误原因：

语句中缺少默认值

class Main(models.Model):
    img = models.CharField(max_length=255)
    name = models.CharField(max_length=64)
    trackid = models.IntegerField(default=1)

    class Meta:
        abstract = True

解决方案：

在语句中添加任意的默认值，之后再执行ORM迁移指令：

class Main(models.Model):
    img = models.CharField(max_length=255, default='1')
    name = models.CharField(max_length=64, default='1')
    trackid = models.IntegerField(default=1)

    class Meta:
        abstract = True

标签：do,non,models,max,existing,default,length,CharField,class
来源： https://www.cnblogs.com/leoych/p/14959610.html