Django的迁移产生奇怪的错误

Question

我想创建一个彩票应用程序，它已经工作正常，但今天当我试图做一个python manage.py迁移lotteryapp它开始生产，其中指出

django.db.utils.OperationalError: (1060, "Duplicate column name 'email'") 

错误所以我删除了电子邮件的所有参考资料，看看是否能解决这个问题，但它仍然会给出错误。然后我删除了数据库中的所有在一起，重新开始，但随后给了这个错误

ValueError: invalid literal for int() with base 10: '' 

我已经在我的models.py文件，并回去了，并再次运行该命令并再次给出了重复的列错误。这没有任何意义。这里是我的代码models.py：

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

class Lottery(models.Model): 
    name = models.CharField(default="", max_length=50) 
    date_drawn = models.DateTimeField(default=datetime.now,blank=True) 
    win_amount = models.IntegerField(default=0) 
    winning_numbers = models.IntegerField(default="") 
    def __unicode__(self): 
     return self.name 

class Winner(models.Model): 
    first_name = models.CharField(max_length=100, default="") 
    last_name = models.CharField(max_length=100, default="") 
    winner_telephone = models.IntegerField(max_length=15, default="") 
    lottery_numbers = models.IntegerField(default=0) 
    lottery_won = models.CharField(max_length=50, default="") 
    def __unicode__(self): 
     return self.name 

class User(models.Model): 
    first_name = models.CharField(max_length=100, default="") 
    last_name = models.CharField(max_length=100, default="") 
    telephone = models.IntegerField(default="") 
    def __unicode__(self): 
     return self.first_name 

class entered_user(models.Model): 
    first_name = models.CharField(max_length=100, default="") 
    last_name = models.CharField(max_length=100, default="") 
    telephone = models.IntegerField(default="") 
    lottery_numbers = models.IntegerField(default="") 
    def __unicode__(self): 
     return self.first_name 

Answer 1

的问题是与领域lottery_won和lottery_numbers。将默认值更改为0，然后重试。

Answer 2

1. IntegerField不能有默认字符串类型，也没有属性MAX_LENGTH：

   • winning_numbers = models.IntegerField（默认值= “”）
   • winner_telephone =模型。 IntegerField（max_length = 15，default =“”）
   • telephone = models.IntegerField（default =“”）
   • lottery_numbers = models.IntegerField（默认值=“”）

2. 避免调用模型的用户，因为它可能会导致冲突与默认的Django 用户型号并且可以为电子邮件错误信息的原因。

@CNB 我试过如下我只是改变了用户到的usermodel代码和迁移工作正常：

from __future__ import unicode_literals 
from django.db import models 
from django.db import models 
from django.utils import timezone 
from datetime import datetime 

class Lottery(models.Model): 
    name = models.CharField(default="", max_length=50) 
    date_drawn = models.DateTimeField(default=datetime.now,blank=True) 
    win_amount = models.IntegerField(default=0) 
    winning_numbers = models.IntegerField(default=0) 
    def __unicode__(self): 
     return self.name 

class Winner(models.Model): 
    first_name = models.CharField(max_length=100, default="") 
    last_name = models.CharField(max_length=100, default="") 
    winner_telephone = models.IntegerField(default="") 
    lottery_numbers = models.IntegerField(default=0) 
    lottery_won = models.CharField(max_length=50, default="") 
    def __unicode__(self): 
     return self.name 

class UserModel(models.Model): 
    first_name = models.CharField(max_length=100, default="") 
    last_name = models.CharField(max_length=100, default="") 
    telephone = models.IntegerField(default=0) 
    def __unicode__(self): 
     return self.first_name 

class entered_user(models.Model): 
    first_name = models.CharField(max_length=100, default="") 
    last_name = models.CharField(max_length=100, default="") 
    telephone = models.IntegerField(default=0) 
    lottery_numbers = models.IntegerField(default=0) 
    def __unicode__(self): 
     return self.first_name