当我尝试在heroku服务器上运行python manage.py migrate时，标题中显示了错误（迁移在本地工作正常）。
完整追溯：
Applying auth.0010_alter_group_name_max_length... OK
Applying auth.0011_update_proxy_permissions... OK
Applying engine.0051_userprofile_referral... OK
Applying engine.0052_auto_20190414_0131...Traceback (most recent call last):
File "manage.py", line 15, in <module>
execute_from_command_line(sys.argv)
File "/app/.heroku/python/lib/python3.6/site-packages/django/core/management/__init__.py", line 381, in execute_from_command_line
utility.execute()
File "/app/.heroku/python/lib/python3.6/site-packages/django/core/management/__init__.py", line 375, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/app/.heroku/python/lib/python3.6/site-packages/django/core/management/base.py", line 323, in run_from_argv
self.execute(*args, **cmd_options)
File "/app/.heroku/python/lib/python3.6/site-packages/django/core/management/base.py", line 364, in execute
output = self.handle(*args, **options)
File "/app/.heroku/python/lib/python3.6/site-packages/django/core/management/base.py", line 83, in wrapped
res = handle_func(*args, **kwargs)
File "/app/.heroku/python/lib/python3.6/site-packages/django/core/management/commands/migrate.py", line 234, in handle
fake_initial=fake_initial,
File "/app/.heroku/python/lib/python3.6/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 "/app/.heroku/python/lib/python3.6/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 "/app/.heroku/python/lib/python3.6/site-packages/django/db/migrations/executor.py", line 245, in apply_migration
state = migration.apply(state, schema_editor)
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/migrations/migration.py", line 124, in apply
operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/migrations/operations/fields.py", line 249, in database_forwards
schema_editor.alter_field(from_model, from_field, to_field)
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/backends/base/schema.py", line 507, in alter_field
new_db_params = new_field.db_parameters(connection=self.connection)
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/models/fields/related.py", line 966, in db_parameters
return {"type": self.db_type(connection), "check": self.db_check(connection)}
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/models/fields/related.py", line 963, in db_type
return self.target_field.rel_db_type(connection=connection)
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/models/fields/related.py", line 878, in target_field
return self.foreign_related_fields[0]
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/models/fields/related.py", line 632, in foreign_related_fields
return tuple(rhs_field for lhs_field, rhs_field in self.related_fields if rhs_field)
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/models/fields/related.py", line 619, in related_fields
self._related_fields = self.resolve_related_fields()
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/models/fields/related.py", line 604, in resolve_related_fields
raise ValueError('Related model %r cannot be resolved' % self.remote_field.model)
ValueError: Related model 'referrals.Referral' cannot be resolved
这是迁移引擎。0052：
from django.db import migrations, models
import django.db.models.deletion
class Migration(migrations.Migration):
dependencies = [
('engine', '0051_userprofile_referral'),
]
operations = [
migrations.AlterField(
model_name='userprofile',
name='referral',
field=models.OneToOneField(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, to='referrals.Referral'),
),
]
还有我的models.py，相关部分：
class UserProfile(models.Model):
user = models.OneToOneField(User, on_delete=models.CASCADE)
slug = models.SlugField(max_length=50, blank=True, null=True)
following = models.ManyToManyField(User, related_name="followers")
full_name = models.CharField(max_length=50, blank=True, null=True)
thumbnail = models.ImageField(
upload_to="userprofile_thumbnails/", blank=True, null=True)
bio = models.TextField(blank=True, null=True)
paypal_email = models.EmailField(blank=True, null=True)
#balance = models.BigIntegerField(blank=True, null=True)
#total_earned = models.BigIntegerField(blank=True, null=True)
registration_ip = models.GenericIPAddressField(blank=True, null=True)
referral = models.OneToOneField(
Referral, blank=True, null=True, on_delete=models.CASCADE)
有人可以帮忙吗？ Referrals是程序包pinax.referrals：https://github.com/pinax/pinax-referrals
它有一个我正在使用的名为Referral的模型。再说一次，迁移在本地工作得很好，尽管不是在heroku生产中。请帮忙。预先感谢。
答案 0 :(得分：0)
将('referrals', '__first__')添加到了我的依赖项中，此方法有效。 （没有更多错误）