我有一个这样的模型文件：
from django.db import models
class Gin(models.Model):
objectId = models.CharField(max_length=100, unique=True)
alcohol = models.FloatField(null=True, blank=True, default=None)
name = models.CharField(max_length=100)
picture = models.CharField(max_length=200)
class GinLocal(models.Model):
objectId = models.CharField(max_length=100)
origin = models.TextField()
serve = models.TextField()
aroma = models.TextField()
运行以下终端命令后，将添加第二个类GinLocal：
python manage.py makemigrations ginsdb
python manage.py migrate ginsdb
第一次运行良好，第二次添加第二个模型时，我总是在migration命令上收到此错误：
(myvenv) ➜ gins4udjango python manage.py migrate ginsdb
Operations to perform:
Apply all migrations: ginsdb
Running migrations:
Rendering model states... DONE
Applying ginsdb.0002_ginlocal...Traceback (most recent call last):
File "/Users/donpironet/Documents/Development/Private/gins4udjango/myvenv/lib/python3.5/site-packages/django/db/models/options.py", line 580, in get_field
return self.fields_map[field_name]
KeyError: <django.db.models.fields.CharField>
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "/Users/donpironet/Documents/Development/Private/gins4udjango/myvenv/lib/python3.5/site-packages/django/core/management/__init__.py", line 353, in execute_from_command_line
utility.execute()
File "/Users/donpironet/Documents/Development/Private/gins4udjango/myvenv/lib/python3.5/site-packages/django/core/management/__init__.py", line 345, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/Users/donpironet/Documents/Development/Private/gins4udjango/myvenv/lib/python3.5/site-packages/django/core/management/base.py", line 348, in run_from_argv
self.execute(*args, **cmd_options)
File "/Users/donpironet/Documents/Development/Private/gins4udjango/myvenv/lib/python3.5/site-packages/django/core/management/base.py", line 399, in execute
output = self.handle(*args, **options)
File "/Users/donpironet/Documents/Development/Private/gins4udjango/myvenv/lib/python3.5/site-packages/django/core/management/commands/migrate.py", line 200, in handle
executor.migrate(targets, plan, fake=fake, fake_initial=fake_initial)
File "/Users/donpironet/Documents/Development/Private/gins4udjango/myvenv/lib/python3.5/site-packages/django/db/migrations/executor.py", line 92, in migrate
self._migrate_all_forwards(plan, full_plan, fake=fake, fake_initial=fake_initial)
File "/Users/donpironet/Documents/Development/Private/gins4udjango/myvenv/lib/python3.5/site-packages/django/db/migrations/executor.py", line 121, in _migrate_all_forwards
state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)
File "/Users/donpironet/Documents/Development/Private/gins4udjango/myvenv/lib/python3.5/site-packages/django/db/migrations/executor.py", line 198, in apply_migration
state = migration.apply(state, schema_editor)
File "/Users/donpironet/Documents/Development/Private/gins4udjango/myvenv/lib/python3.5/site-packages/django/db/migrations/migration.py", line 123, in apply
operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
File "/Users/donpironet/Documents/Development/Private/gins4udjango/myvenv/lib/python3.5/site-packages/django/db/migrations/operations/models.py", line 59, in database_forwards
schema_editor.create_model(model)
File "/Users/donpironet/Documents/Development/Private/gins4udjango/myvenv/lib/python3.5/site-packages/django/db/backends/base/schema.py", line 235, in create_model
definition, extra_params = self.column_sql(model, field)
File "/Users/donpironet/Documents/Development/Private/gins4udjango/myvenv/lib/python3.5/site-packages/django/db/backends/base/schema.py", line 134, in column_sql
db_params = field.db_parameters(connection=self.connection)
File "/Users/donpironet/Documents/Development/Private/gins4udjango/myvenv/lib/python3.5/site-packages/django/db/models/fields/related.py", line 967, in db_parameters
return {"type": self.db_type(connection), "check": []}
File "/Users/donpironet/Documents/Development/Private/gins4udjango/myvenv/lib/python3.5/site-packages/django/db/models/fields/related.py", line 958, in db_type
rel_field = self.target_field
File "/Users/donpironet/Documents/Development/Private/gins4udjango/myvenv/lib/python3.5/site-packages/django/db/models/fields/related.py", line 861, in target_field
return self.foreign_related_fields[0]
File "/Users/donpironet/Documents/Development/Private/gins4udjango/myvenv/lib/python3.5/site-packages/django/db/models/fields/related.py", line 594, in foreign_related_fields
return tuple(rhs_field for lhs_field, rhs_field in self.related_fields if rhs_field)
File "/Users/donpironet/Documents/Development/Private/gins4udjango/myvenv/lib/python3.5/site-packages/django/db/models/fields/related.py", line 581, in related_fields
self._related_fields = self.resolve_related_fields()
File "/Users/donpironet/Documents/Development/Private/gins4udjango/myvenv/lib/python3.5/site-packages/django/db/models/fields/related.py", line 574, in resolve_related_fields
else self.remote_field.model._meta.get_field(to_field_name))
File "/Users/donpironet/Documents/Development/Private/gins4udjango/myvenv/lib/python3.5/site-packages/django/db/models/options.py", line 582, in get_field
raise FieldDoesNotExist('%s has no field named %r' % (self.object_name, field_name))
django.core.exceptions.FieldDoesNotExist: Gin has no field named <django.db.models.fields.CharField>
(myvenv) ➜ gins4udjango
有人有主意吗？我没看到问题。
编辑：
Latest migration file
# -*- coding: utf-8 -*-
# Generated by Django 1.9.5 on 2016-04-23 10:45
from __future__ import unicode_literals
from django.db import migrations, models
class Migration(migrations.Migration):
dependencies = [
('ginsdb', '0007_delete_ginlocal'),
]
operations = [
migrations.CreateModel(
name='GinLocal',
fields=[
('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
('objectId', models.CharField(max_length=100)),
('origin', models.TextField()),
('serve', models.TextField()),
('aroma', models.TextField()),
],
),
]
最佳答案
如错误日志中所述，问题出在：位于ginsdb.0002_ginlocal...中的../Path_To_Your_App/ginsdb/migrations
您有2个选择：
1-如果数据库为空，而您没有输入任何内容，则可以简单地创建一个新数据库，在settings.py中更改数据库，在../Path_To_Your_App/ginsdb/migrations中清除所有迁移，然后尝试以下操作：
>>>python manage.py makemigrations
>>>python manage.py migrate ginsdb
2-如果您不想更改数据库，则应查找错误原因，因为开始时应将所有文件发布到
../Path_To_Your_App/ginsdb/migrations/中并说出设计模型的步骤。
在某些情况下，只需删除
../Path_To_Your_App/ginsdb/migrations/ginsdb.0002_ginlocal...关于python - Django模型无法迁移，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/36809775/