编程错误：Django中带有PhoneNumberField

Question

pip后，在全局和虚拟环境中安装电话号码字段 并在models.py中导入 我面临编程错误。 详情如下:

DB是POSTGRESQL

models.py
from django.db import models
from phonenumber_field.modelfields import PhoneNumberField

class Agent(models.Model):
    agency_name = models.CharField(max_length=200)
    prop_name = models.CharField(max_length=30)
    agency_address = models.CharField(max_length=300)
    agency_city = models.CharField(max_length=50)
    agency_country = models.CharField(max_length=50)
    email_address = models.EmailField(max_length=50)
    contact_nu = PhoneNumberField()

    def __str__(self):
        return self.agency_name

admin.py

@admin.register(Agent)
class AgentAdmin(admin.ModelAdmin):
    list_display = ('agency_name', 'prop_name', 'agency_address', 'agency_city', 'agency_country', 'email_address', 'contact_nu')

Error:

[07/Jun/2021 09:52:34] "GET /admin/ HTTP/1.1" 200 5546
Internal Server Error: /admin/rk003/agent/
Traceback (most recent call last):
  File "/Users/rishipalsingh/Projects/notes/mdndjango/venv/lib/python3.9/site-packages/django/db/backends/utils.py", line 84, in _execute
    return self.cursor.execute(sql, params)
psycopg2.errors.UndefinedColumn: column rk003_agent.contact_nu does not exist

迁移时的错误如下所示 迁移期间没有错误。Makemigration工作正常，可以创建模型。检查也不会返回任何错误。就在迁移时，下面的错误弹出

File "/Users/rishipalsingh/Projects/notes/mdndjango/venv/lib/python3.9/site-packages/django/db/backends/utils.py", line 84, in _execute
    return self.cursor.execute(sql, params)
psycopg2.errors.UndefinedColumn: column "contact_nu" of relation "rk003_agent" does not exist


The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/Users/rishipalsingh/Projects/notes/mdndjango/rk002/manage.py", line 22, in <module>
    main()
  File "/Users/rishipalsingh/Projects/notes/mdndjango/rk002/manage.py", line 18, in main
    execute_from_command_line(sys.argv)
  File "/Users/rishipalsingh/Projects/notes/mdndjango/venv/lib/python3.9/site-packages/django/core/management/__init__.py", line 419, in execute_from_command_line
    utility.execute()
  File "/Users/rishipalsingh/Projects/notes/mdndjango/venv/lib/python3.9/site-packages/django/core/management/__init__.py", line 413, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/Users/rishipalsingh/Projects/notes/mdndjango/venv/lib/python3.9/site-packages/django/core/management/base.py", line 354, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/Users/rishipalsingh/Projects/notes/mdndjango/venv/lib/python3.9/site-packages/django/core/management/base.py", line 398, in execute
    output = self.handle(*args, **options)
  File "/Users/rishipalsingh/Projects/notes/mdndjango/venv/lib/python3.9/site-packages/django/core/management/base.py", line 89, in wrapped
    res = handle_func(*args, **kwargs)
  File "/Users/rishipalsingh/Projects/notes/mdndjango/venv/lib/python3.9/site-packages/django/core/management/commands/migrate.py", line 244, in handle
    post_migrate_state = executor.migrate(
  File "/Users/rishipalsingh/Projects/notes/mdndjango/venv/lib/python3.9/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 "/Users/rishipalsingh/Projects/notes/mdndjango/venv/lib/python3.9/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 "/Users/rishipalsingh/Projects/notes/mdndjango/venv/lib/python3.9/site-packages/django/db/migrations/executor.py", line 227, in apply_migration
    state = migration.apply(state, schema_editor)
  File "/Users/rishipalsingh/Projects/notes/mdndjango/venv/lib/python3.9/site-packages/django/db/migrations/migration.py", line 126, in apply
    operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
  File "/Users/rishipalsingh/Projects/notes/mdndjango/venv/lib/python3.9/site-packages/django/db/migrations/operations/fields.py", line 244, in database_forwards
    schema_editor.alter_field(from_model, from_field, to_field)
  File "/Users/rishipalsingh/Projects/notes/mdndjango/venv/lib/python3.9/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 "/Users/rishipalsingh/Projects/notes/mdndjango/venv/lib/python3.9/site-packages/django/db/backends/postgresql/schema.py", line 196, in _alter_field
    super()._alter_field(
  File "/Users/rishipalsingh/Projects/notes/mdndjango/venv/lib/python3.9/site-packages/django/db/backends/base/schema.py", line 751, in _alter_field
    self.execute(
  File "/Users/rishipalsingh/Projects/notes/mdndjango/venv/lib/python3.9/site-packages/django/db/backends/base/schema.py", line 145, in execute
    cursor.execute(sql, params)
  File "/Users/rishipalsingh/Projects/notes/mdndjango/venv/lib/python3.9/site-packages/django/db/backends/utils.py", line 98, in execute
    return super().execute(sql, params)
  File "/Users/rishipalsingh/Projects/notes/mdndjango/venv/lib/python3.9/site-packages/django/db/backends/utils.py", line 66, in execute
    return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
  File "/Users/rishipalsingh/Projects/notes/mdndjango/venv/lib/python3.9/site-packages/django/db/backends/utils.py", line 75, in _execute_with_wrappers
    return executor(sql, params, many, context)
  File "/Users/rishipalsingh/Projects/notes/mdndjango/venv/lib/python3.9/site-packages/django/db/backends/utils.py", line 84, in _execute
    return self.cursor.execute(sql, params)
  File "/Users/rishipalsingh/Projects/notes/mdndjango/venv/lib/python3.9/site-packages/django/db/utils.py", line 90, in __exit__
    raise dj_exc_value.with_traceback(traceback) from exc_value
  File "/Users/rishipalsingh/Projects/notes/mdndjango/venv/lib/python3.9/site-packages/django/db/backends/utils.py", line 84, in _execute
    return self.cursor.execute(sql, params)
django.db.utils.ProgrammingError: column "contact_nu" of relation "rk003_agent" does not exist

谢谢

Answer 1

使用CharField，易于处理，不会导致任何过度错误