我在 django 的模型中添加了一个时间字段，当我应用迁移时出现错误，当我在模型中删除该字段时仍然出现错误

问题描述

错误：

Operations to perform:
Apply all migrations: admin,auth,contenttypes,sessions,tohome
Running migrations:
Applying tohome.0003_auto_20210323_1611...Traceback (most recent call last):
File "manage.py",line 22,in <module>
main()
File "manage.py",line 18,in main
execute_from_command_line(sys.argv)
File "C:\Users\madhu\Desktop\Django work\work_env\lib\site- 
packages\django\core\management\__init__.py",line 401,in execute_from_command_line
utility.execute()
File "C:\Users\madhu\Desktop\Django work\work_env\lib\site- 
packages\django\core\management\__init__.py",line 395,in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
 File "C:\Users\madhu\Desktop\Django work\work_env\lib\site-packages\django\core\management\base.py",line 330,in run_from_argv       
 self.execute(*args,**cmd_options)
 File "C:\Users\madhu\Desktop\Django work\work_env\lib\site-packages\django\core\management\base.py",line 371,in execute
 output = self.handle(*args,**options)
 File "C:\Users\madhu\Desktop\Django work\work_env\lib\site-packages\django\core\management\base.py",line 85,in wrapped
 res = handle_func(*args,**kwargs)
 File "C:\Users\madhu\Desktop\Django work\work_env\lib\site- 
 packages\django\core\management\commands\migrate.py",line 245,in handle  
 fake_initial=fake_initial,File "C:\Users\madhu\Desktop\Django work\work_env\lib\site- 
 packages\django\db\migrations\executor.py",line 117,in migrate
state = self._migrate_all_forwards(state,plan,full_plan,fake=fake,fake_initial=fake_initial)
 File "C:\Users\madhu\Desktop\Django work\work_env\lib\site- 
packages\django\db\migrations\executor.py",line 147,in _migrate_all_forwards
state = self.apply_migration(state,migration,fake_initial=fake_initial)
File "C:\Users\madhu\Desktop\Django work\work_env\lib\site- 
packages\django\db\migrations\executor.py",line 227,in apply_migration   
state = migration.apply(state,schema_editor)
File "C:\Users\madhu\Desktop\Django work\work_env\lib\site- 
packages\django\db\migrations\migration.py",line 124,in apply
operation.database_forwards(self.app_label,schema_editor,old_state,project_state)
  File "C:\Users\madhu\Desktop\Django work\work_env\lib\site- 
packages\django\db\migrations\operations\fields.py",line 106,in database_forwards
field,

) 文件“C:\Users\madhu\Desktop\Django work\work_env\lib\site-packages\django\utils\dateparse.py”，行 90、在parse_time 匹配 = time_re.match(value) 类型错误：预期的字符串或类似字节的对象

models.py

from django.db import models
    class Task(models.Model):
    title = models.CharField(max_length =200)
    complete = models.BooleanField(default = False,blank=True)
    created = models.DateTimeField(auto_Now=True)
    settime = models.TimeField((""),auto_Now=False,auto_Now_add=False)


    def __str__(self):
      return self.title

解决方法

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