无法在Django中添加新的空白字段（DataError）

我正在尝试创建一个django应用程序与卖家，图书应用程序。它运行得很好，但我想在我的数据库中再添加一个字段，并在books\models.py中添加一个字段，blank=True

我正在尝试添加新的空白字段，但无法迁移

我尝试运行代码：python manage.py migrate

错误代码为：

型号.py

from django.db import models
from datetime import datetime

from book_sellers.models import Seller


# Create your models here.
class Book(models.Model):
    seller = models.ForeignKey(Seller,on_delete = models.DO_NOTHING)
    bname = models.CharField(max_length=100)
    isbn = models.CharField(max_length=40,blank=True)
    genre1 = models.CharField(blank=True,max_length=32,choices=[("1","Motivational"),("2","Fiction"),("3","Business"),("4","Children"),("5","Health"),("6","Story")],)
    genre2 = models.CharField(blank=True,max_length=32,choices=[("1","Motivational"),("2","Fiction"),("3","Business"),("4","Children"),("5","Health"),("6","Story")],)
    genre3 = models.CharField(blank=True,max_length=32,choices=[("1","Motivational"),("2","Fiction"),("3","Business"),("4","Children"),("5","Health"),("6","Story")],)
    writerName = models.CharField(max_length=100,blank=True)
    
    price = models.IntegerField()   

    number_of_enquiry = models.CharField(max_length=100,blank=True) 
    
    description = models.CharField(max_length=1000)
    photo_main = models.ImageField(upload_to = 'photos/%Y/%m/%d/')
    list_date = models.DateTimeField(default = datetime.now(),blank = True)

    is_published = models.BooleanField(default = True)

    def __str__(self):
        return self.bname

**获取此错误**

Traceback (most recent call last):
  File "C:\Users\HP\OneDrive\Desktop\PROJECT\BookStore\manage.py", line 22, in <module>
    main()
  File "C:\Users\HP\OneDrive\Desktop\PROJECT\BookStore\manage.py", line 18, in main
    execute_from_command_line(sys.argv)
  File "C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site-packages\django\core\management\__init__.py", line 419, in execute_from_command_line
    utility.execute()
  File "C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site-packages\django\core\management\__init__.py", line 413, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site-packages\django\core\management\base.py", line 354, in run_from_argv
    self.execute(*args, **cmd_options)
  File "C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site-packages\django\core\management\base.py", line 398, in execute
    output = self.handle(*args, **options)
  File "C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site-packages\django\core\management\base.py", line 89, in wrapped
    res = handle_func(*args, **kwargs)
  File "C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site-packages\django\core\management\commands\migrate.py", line 244, in handle
    post_migrate_state = executor.migrate(
  File "C:\Users\HP\OneDrive\Desktop\PROJECT\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\HP\OneDrive\Desktop\PROJECT\env\lib\site-packages\django\db\migrations\executor.py", line 147, in _migrate_all_forwards
    state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)
  File "C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site-packages\django\db\migrations\executor.py", line 227, in apply_migration
    state = migration.apply(state, schema_editor)
  File "C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site-packages\django\db\migrations\migration.py", line 126, in apply
    operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
  File "C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site-packages\django\db\migrations\operations\fields.py", line 244, in database_forwards
    schema_editor.alter_field(from_model, from_field, to_field)
  File "C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site-packages\django\db\backends\base\schema.py", line 594, in alter_field
    self._alter_field(model, old_field, new_field, old_type, new_type,
  File "C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site-packages\django\db\backends\postgresql\schema.py", line 196, in _alter_field
    super()._alter_field(
  File "C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site-packages\django\db\backends\base\schema.py", line 751, in _alter_field
    self.execute(
  File "C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site-packages\django\db\backends\base\schema.py", line 145, in execute
    cursor.execute(sql, params)
  File "C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site-packages\django\db\backends\utils.py", line 98, in execute
    return super().execute(sql, params)
  File "C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site-packages\django\db\backends\utils.py", line 66, in execute
    return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
  File "C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site-packages\django\db\backends\utils.py", line 75, in _execute_with_wrappers
    return executor(sql, params, many, context)
  File "C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site-packages\django\db\backends\utils.py", line 84, in _execute
    return self.cursor.execute(sql, params)
  File "C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site-packages\django\db\utils.py", line 90, in __exit__
    raise dj_exc_value.with_traceback(traceback) from exc_value
  File "C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site-packages\django\db\backends\utils.py", line 84, in _execute
    return self.cursor.execute(sql, params)
django.db.utils.DataError: invalid input syntax for type integer: ""

回溯（最近一次呼叫最后一次）：
文件“C:\Users\HP\OneDrive\Desktop\PROJECT\BookStore\manage.py”，第22行，在
main（）
文件“C:\Users\HP\OneDrive\Desktop\PROJECT\BookStore\manage.py”，主目录第18行
从命令行（sys.argv）执行命令
文件“C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site packages\django\core\management\ \uuuuu init\uuuuuu.py”，第419行，从命令行执行
utility.execute（）
文件“C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site packages\django\core\management\\uuuu init\uuuu.py”，第413行，在execute中
self.fetch_命令（子命令）。从_argv（self.argv）运行_
文件“C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site packages\django\core\management\base.py”，第354行，从\u argv运行
self.execute（*args，**cmd_选项）
文件“C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site packages\django\core\management\base.py”，第398行，在execute中
输出=self.handle（*args，**选项）
文件“C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site packages\django\core\management\base.py”，第89行，已包装
res=句柄函数（*args，**kwargs）
文件“C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site packages\django\core\management\commands\migrate.py”，第244行，位于句柄中
post\u migrate\u state=executor.migrate(
文件“C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site packages\django\db\migrations\executor.py”，第117行，在migrate中
状态=self.\u迁移\u所有\u转发（状态，计划，完整计划，假=假，假首字母=假首字母）
文件“C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site packages\django\db\migrations\executor.py”，第147行，全部向前迁移
state=self.apply\u迁移（state，migration，false=false，false\u initial=false\u initial）
文件“C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site packages\django\db\migrations\executor.py”，第227行，在apply\u migration中
state=migration.apply（状态，模式编辑器）
文件“C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site packages\django\db\migrations\migration.py”，第126行，在apply中
操作。数据库转发（self.app\u标签、模式编辑器、旧状态、项目状态）
数据库中的文件“C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site packages\django\db\migrations\operations\fields.py”第244行
schema_editor.alter_字段（从_模型、从_字段到_字段）
文件“C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site packages\django\db\backends\base\schema.py”，第594行，在alter\u字段中
self.\u alter\u字段（模型、旧字段、新字段、旧类型、新类型、，
文件“C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site packages\django\db\backends\postgresql\schema.py”，第196行，在\u alter\u字段中
super（）。\u alter\u字段(
文件“C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site packages\django\db\backends\base\schema.py”，第751行，在\u alter\u字段中
自我执行(
文件“C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site packages\django\db\backends\base\schema.py”，执行中第145行
cursor.execute（sql，params）
文件“C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site packages\django\db\backends\utils.py”，第98行，在execute中
return super（）.execute（sql，params）
文件“C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site packages\django\db\backends\utils.py”，第66行，在execute中
返回self.\u使用包装器执行（sql，params，many=False，executor=self.\u execute）
文件“C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site packages\django\db\backends\utils.py”，第75行，带包装器的执行
返回执行器（sql、参数、多个、上下文）
文件“C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site packages\django\db\backends\utils.py”，第84行，在执行中
返回self.cursor.execute（sql，params）
文件“C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site packages\django\db\utils.py”，第90行，在退出时__
使用exc_值的_回溯（回溯）提高dj_exc_值
文件“C:\Users\HP\OneDrive\Desktop\PROJECT\env\lib\site packages\django\db\backends\utils.py”，第84行，在执行中
返回self.cursor.execute（sql，params）
django.db.utils.DataError:整数类型的输入语法无效：“”

您具体添加了哪个字段？而且回溯似乎表明某个字段正在更改而不是创建。您是否可以检查

迁移

文件夹中最新未应用的迁移文件，并确认尝试添加或更改哪些字段？