因此，同时删除 类 及其子 类 时出现 Django 迁移错误，显示为 sql 语法错误，带有 sqlite3
So, I have a Django migrate error when removing classes and their subclasses at the same time, which appears as an sql syntax error, with sqlite3
我在迁移我的模型时遇到错误，我认为这是由于我设置 'limit_choices_to' 包含引号等的方式所致。
Migrations for 'characters':
0005_auto_20150129_1019.py:
- Remove field attribute from dicepool
- Remove field contested_dicepool from dicepool
- Remove field resisted_by_attribute from dicepool
- Remove field second_attribute from dicepool
- Remove field skill from dicepool
- Remove field arcana from spelldicepool
- Remove field dicepool_ptr from spelldicepool
- Delete model DicePool
- Delete model SpellDicePool
- Remove field spells from mage
- Add field contested to spell
- Add field contested_attribute to spell
- Add field contested_skill to spell
- Add field mage to spell
- Add field resisted to spell
- Add field resisted_by_attribute to spell
- Add field rote_attribute to spell
- Add field rote_skill to spell
PS D:\Django_Projects\nwod_characters> .\manage.py migrate
Operations to perform:
Synchronize unmigrated apps: autocomplete_light
Apply all migrations: sessions, admin, auth, characters, contenttypes
Synchronizing apps without migrations:
Creating tables...
Installing custom SQL...
Installing indexes...
Running migrations:
Applying characters.0005_auto_20150129_1019...Traceback (most recent call last):
File "C:\Python34\lib\site-packages\django\db\backends\utils.py", line 65, in execute
return self.cursor.execute(sql, params)
File "C:\Python34\lib\site-packages\django\db\backends\sqlite3\base.py", line 485, in execute
return Database.Cursor.execute(self, query, params)
sqlite3.OperationalError: near ")": syntax error
我在右括号附近找不到任何错误，所以我猜这是我的可调用项，但我听从了建议 here。
编辑：
实际上，删除可调用对象似乎没有任何效果。这是我的 migration.py 文件：
# -*- coding: utf-8 -*-
from __future__ import unicode_literals
from django.db import models, migrations
class Migration(migrations.Migration):
dependencies = [
('characters', '0004_remove_mage_arcana'),
]
operations = [
migrations.RemoveField(
model_name='dicepool',
name='attribute',
),
migrations.RemoveField(
model_name='dicepool',
name='contested_dicepool',
),
migrations.RemoveField(
model_name='dicepool',
name='resisted_by_attribute',
),
migrations.RemoveField(
model_name='dicepool',
name='second_attribute',
),
migrations.RemoveField(
model_name='dicepool',
name='skill',
),
migrations.RemoveField(
model_name='spelldicepool',
name='arcana',
),
migrations.RemoveField(
model_name='spelldicepool',
name='dicepool_ptr',
),
migrations.DeleteModel(
name='DicePool',
),
migrations.DeleteModel(
name='SpellDicePool',
),
migrations.RemoveField(
model_name='mage',
name='spells',
),
migrations.AddField(
model_name='spell',
name='contested',
field=models.BooleanField(default=False),
preserve_default=True,
),
migrations.AddField(
model_name='spell',
name='contested_attribute',
field=models.ForeignKey(related_name='spell_by_contested_attribute', default=None, to='characters.Attribute'),
preserve_default=True,
),
migrations.AddField(
model_name='spell',
name='contested_skill',
field=models.ForeignKey(related_name='spell_by_contested_skill', default=None, to='characters.Skill'),
preserve_default=True,
),
migrations.AddField(
model_name='spell',
name='mage',
field=models.ForeignKey(related_name='spell_by_mage', default=None, to='characters.Mage'),
preserve_default=False,
),
migrations.AddField(
model_name='spell',
name='resisted',
field=models.BooleanField(default=False),
preserve_default=True,
),
migrations.AddField(
model_name='spell',
name='resisted_by_attribute',
field=models.ForeignKey(related_name='dice_pools_by_resistance_attribute', default=None, to='characters.Attribute', choices=[('Mental', (('Intelligence', 'Intelligence'), ('Wits', 'Wits'), ('Resolve', 'Resolve'))), ('Physical', (('Strength', 'Strength'), ('Dexterity', 'Dexterity'), ('Stamina', 'Stamina'))), ('Social', (('Presence', 'Presence'), ('Manipulation', 'Manipulation'), ('Composure', 'Composure')))]),
preserve_default=False,
),
migrations.AddField(
model_name='spell',
name='rote_attribute',
field=models.ForeignKey(related_name='spell_by_rote_attribute', default=None, to='characters.Attribute', choices=[('Mental', (('Intelligence', 'Intelligence'), ('Wits', 'Wits'), ('Resolve', 'Resolve'))), ('Physical', (('Strength', 'Strength'), ('Dexterity', 'Dexterity'), ('Stamina', 'Stamina'))), ('Social', (('Presence', 'Presence'), ('Manipulation', 'Manipulation'), ('Composure', 'Composure')))]),
preserve_default=False,
),
migrations.AddField(
model_name='spell',
name='rote_skill',
field=models.ForeignKey(related_name='spell_by_rote_skill', default=None, to='characters.Skill', choices=[('Mental', (('Academics', 'Academics'), ('Computer', 'Computer'), ('Crafts', 'Crafts'), ('Investigation', 'Investigation'), ('Medicine', 'Medicine'), ('Occult', 'Occult'), ('Politics', 'Politics'), ('Science', 'Science'))), ('Physical', (('Athletics', 'Athletics'), ('Brawl', 'Brawl'), ('Drive', 'Drive'), ('Firearms', 'Firearms'), ('Larceny', 'Larceny'), ('Stealth', 'Stealth'), ('Survival', 'Survival'), ('Weaponry', 'Weaponry'))), ('Social', (('Animal Ken', 'Animal Ken'), ('Empathy', 'Empathy'), ('Expression', 'Expression'), ('Intimidation', 'Intimidation'), ('Persuasion', 'Persuasion'), ('Socialize', 'Socialize'), ('Streetwise', 'Streetwise'), ('Subterfuge', 'Subterfuge')))]),
preserve_default=False,
),
]
Django migrate 试图删除相互依赖的字段和 class，即 DicePool 和 SpellDicePool。
我得出这个结论 运行 sqlmigrate
PS D:\Django_Projects\nwod_characters> .\manage.py sqlmigrate characters 0005
.....
File "C:\Python34\lib\site-packages\django\db\migrations\state.py", line 71, in render
raise InvalidBasesError("Cannot resolve bases for %r\nThis can happen if you are inheriting models from an app with migrations (e.g. contrib.auth)
\n in an app with no migrations; see https://docs.djangoproject.com/en/1.7/topics/migrations/#dependencies for more" % new_unrendered_models)
django.db.migrations.state.InvalidBasesError: Cannot resolve bases for [<ModelState: 'characters.SpellDicePool'>]
This can happen if you are inheriting models from an app with migrations (e.g. contrib.auth)
in an app with no migrations; see https://docs.djangoproject.com/en/1.7/topics/migrations/#dependencies for more
我减少了对这个的迁移：
class Migration(migrations.Migration):
dependencies = [
('characters', '0004_remove_mage_arcana'),
]
operations = [
migrations.DeleteModel(
name='SpellDicePool',
),
migrations.RemoveField(
model_name='mage',
name='spells',
),
migrations.AddField(
model_name='spell',
name='contested',
field=models.BooleanField(default=False),
preserve_default=True,
),
migrations.AddField(
model_name='spell',
name='contested_attribute',
field=models.ForeignKey(related_name='spell_by_contested_attribute', default=None, to='characters.Attribute'),
preserve_default=True,
),
migrations.AddField(
model_name='spell',
name='contested_skill',
field=models.ForeignKey(related_name='spell_by_contested_skill', default=None, to='characters.Skill'),
preserve_default=True,
),
migrations.AddField(
model_name='spell',
name='mage',
field=models.ForeignKey(related_name='spell_by_mage', default=None, to='characters.Mage'),
preserve_default=False,
),
migrations.AddField(
model_name='spell',
name='resisted',
field=models.BooleanField(default=False),
preserve_default=True,
),
migrations.AddField(
model_name='spell',
name='resisted_by_attribute',
field=models.ForeignKey(related_name='dice_pools_by_resistance_attribute', default=None, to='characters.Attribute', choices=[('Mental', (('Intelligence', 'Intelligence'), ('Wits', 'Wits'), ('Resolve', 'Resolve'))), ('Physical', (('Strength', 'Strength'), ('Dexterity', 'Dexterity'), ('Stamina', 'Stamina'))), ('Social', (('Presence', 'Presence'), ('Manipulation', 'Manipulation'), ('Composure', 'Composure')))]),
preserve_default=False,
),
migrations.AddField(
model_name='spell',
name='rote_attribute',
field=models.ForeignKey(related_name='spell_by_rote_attribute', default=None, to='characters.Attribute', choices=[('Mental', (('Intelligence', 'Intelligence'), ('Wits', 'Wits'), ('Resolve', 'Resolve'))), ('Physical', (('Strength', 'Strength'), ('Dexterity', 'Dexterity'), ('Stamina', 'Stamina'))), ('Social', (('Presence', 'Presence'), ('Manipulation', 'Manipulation'), ('Composure', 'Composure')))]),
preserve_default=False,
),
migrations.AddField(
model_name='spell',
name='rote_skill',
field=models.ForeignKey(related_name='spell_by_rote_skill', default=None, to='characters.Skill', choices=[('Mental', (('Academics', 'Academics'), ('Computer', 'Computer'), ('Crafts', 'Crafts'), ('Investigation', 'Investigation'), ('Medicine', 'Medicine'), ('Occult', 'Occult'), ('Politics', 'Politics'), ('Science', 'Science'))), ('Physical', (('Athletics', 'Athletics'), ('Brawl', 'Brawl'), ('Drive', 'Drive'), ('Firearms', 'Firearms'), ('Larceny', 'Larceny'), ('Stealth', 'Stealth'), ('Survival', 'Survival'), ('Weaponry', 'Weaponry'))), ('Social', (('Animal Ken', 'Animal Ken'), ('Empathy', 'Empathy'), ('Expression', 'Expression'), ('Intimidation', 'Intimidation'), ('Persuasion', 'Persuasion'), ('Socialize', 'Socialize'), ('Streetwise', 'Streetwise'), ('Subterfuge', 'Subterfuge')))]),
preserve_default=False,
),
]
也就是说我删除了所有 migrations.RemoveField 方法，以及 DicePool 的 migrations.DeleteModel（逻辑上应该先删除）。
然后我 运行 manage.py makemigrations 又得到了这个 migration.py 文件：
class Migration(migrations.Migration):
dependencies = [
('characters', '0005_auto_20150129_1035'),
]
operations = [
migrations.RemoveField(
model_name='dicepool',
name='attribute',
),
migrations.RemoveField(
model_name='dicepool',
name='contested_dicepool',
),
migrations.RemoveField(
model_name='dicepool',
name='resisted_by_attribute',
),
migrations.RemoveField(
model_name='dicepool',
name='second_attribute',
),
migrations.RemoveField(
model_name='dicepool',
name='skill',
),
migrations.DeleteModel(
name='DicePool',
),
]
这基本上是我从原始 0005 迁移文件中删除的内容。
运行 迁移可以解决所有问题。
如果有人愿意帮我写票，因为这似乎是一个真正的错误，那将不胜感激。
我在迁移我的模型时遇到错误，我认为这是由于我设置 'limit_choices_to' 包含引号等的方式所致。
Migrations for 'characters':
0005_auto_20150129_1019.py:
- Remove field attribute from dicepool
- Remove field contested_dicepool from dicepool
- Remove field resisted_by_attribute from dicepool
- Remove field second_attribute from dicepool
- Remove field skill from dicepool
- Remove field arcana from spelldicepool
- Remove field dicepool_ptr from spelldicepool
- Delete model DicePool
- Delete model SpellDicePool
- Remove field spells from mage
- Add field contested to spell
- Add field contested_attribute to spell
- Add field contested_skill to spell
- Add field mage to spell
- Add field resisted to spell
- Add field resisted_by_attribute to spell
- Add field rote_attribute to spell
- Add field rote_skill to spell
PS D:\Django_Projects\nwod_characters> .\manage.py migrate
Operations to perform:
Synchronize unmigrated apps: autocomplete_light
Apply all migrations: sessions, admin, auth, characters, contenttypes
Synchronizing apps without migrations:
Creating tables...
Installing custom SQL...
Installing indexes...
Running migrations:
Applying characters.0005_auto_20150129_1019...Traceback (most recent call last):
File "C:\Python34\lib\site-packages\django\db\backends\utils.py", line 65, in execute
return self.cursor.execute(sql, params)
File "C:\Python34\lib\site-packages\django\db\backends\sqlite3\base.py", line 485, in execute
return Database.Cursor.execute(self, query, params)
sqlite3.OperationalError: near ")": syntax error
我在右括号附近找不到任何错误，所以我猜这是我的可调用项，但我听从了建议 here。
编辑：
实际上，删除可调用对象似乎没有任何效果。这是我的 migration.py 文件：
# -*- coding: utf-8 -*-
from __future__ import unicode_literals
from django.db import models, migrations
class Migration(migrations.Migration):
dependencies = [
('characters', '0004_remove_mage_arcana'),
]
operations = [
migrations.RemoveField(
model_name='dicepool',
name='attribute',
),
migrations.RemoveField(
model_name='dicepool',
name='contested_dicepool',
),
migrations.RemoveField(
model_name='dicepool',
name='resisted_by_attribute',
),
migrations.RemoveField(
model_name='dicepool',
name='second_attribute',
),
migrations.RemoveField(
model_name='dicepool',
name='skill',
),
migrations.RemoveField(
model_name='spelldicepool',
name='arcana',
),
migrations.RemoveField(
model_name='spelldicepool',
name='dicepool_ptr',
),
migrations.DeleteModel(
name='DicePool',
),
migrations.DeleteModel(
name='SpellDicePool',
),
migrations.RemoveField(
model_name='mage',
name='spells',
),
migrations.AddField(
model_name='spell',
name='contested',
field=models.BooleanField(default=False),
preserve_default=True,
),
migrations.AddField(
model_name='spell',
name='contested_attribute',
field=models.ForeignKey(related_name='spell_by_contested_attribute', default=None, to='characters.Attribute'),
preserve_default=True,
),
migrations.AddField(
model_name='spell',
name='contested_skill',
field=models.ForeignKey(related_name='spell_by_contested_skill', default=None, to='characters.Skill'),
preserve_default=True,
),
migrations.AddField(
model_name='spell',
name='mage',
field=models.ForeignKey(related_name='spell_by_mage', default=None, to='characters.Mage'),
preserve_default=False,
),
migrations.AddField(
model_name='spell',
name='resisted',
field=models.BooleanField(default=False),
preserve_default=True,
),
migrations.AddField(
model_name='spell',
name='resisted_by_attribute',
field=models.ForeignKey(related_name='dice_pools_by_resistance_attribute', default=None, to='characters.Attribute', choices=[('Mental', (('Intelligence', 'Intelligence'), ('Wits', 'Wits'), ('Resolve', 'Resolve'))), ('Physical', (('Strength', 'Strength'), ('Dexterity', 'Dexterity'), ('Stamina', 'Stamina'))), ('Social', (('Presence', 'Presence'), ('Manipulation', 'Manipulation'), ('Composure', 'Composure')))]),
preserve_default=False,
),
migrations.AddField(
model_name='spell',
name='rote_attribute',
field=models.ForeignKey(related_name='spell_by_rote_attribute', default=None, to='characters.Attribute', choices=[('Mental', (('Intelligence', 'Intelligence'), ('Wits', 'Wits'), ('Resolve', 'Resolve'))), ('Physical', (('Strength', 'Strength'), ('Dexterity', 'Dexterity'), ('Stamina', 'Stamina'))), ('Social', (('Presence', 'Presence'), ('Manipulation', 'Manipulation'), ('Composure', 'Composure')))]),
preserve_default=False,
),
migrations.AddField(
model_name='spell',
name='rote_skill',
field=models.ForeignKey(related_name='spell_by_rote_skill', default=None, to='characters.Skill', choices=[('Mental', (('Academics', 'Academics'), ('Computer', 'Computer'), ('Crafts', 'Crafts'), ('Investigation', 'Investigation'), ('Medicine', 'Medicine'), ('Occult', 'Occult'), ('Politics', 'Politics'), ('Science', 'Science'))), ('Physical', (('Athletics', 'Athletics'), ('Brawl', 'Brawl'), ('Drive', 'Drive'), ('Firearms', 'Firearms'), ('Larceny', 'Larceny'), ('Stealth', 'Stealth'), ('Survival', 'Survival'), ('Weaponry', 'Weaponry'))), ('Social', (('Animal Ken', 'Animal Ken'), ('Empathy', 'Empathy'), ('Expression', 'Expression'), ('Intimidation', 'Intimidation'), ('Persuasion', 'Persuasion'), ('Socialize', 'Socialize'), ('Streetwise', 'Streetwise'), ('Subterfuge', 'Subterfuge')))]),
preserve_default=False,
),
]
Django migrate 试图删除相互依赖的字段和 class，即 DicePool 和 SpellDicePool。
我得出这个结论 运行 sqlmigrate
PS D:\Django_Projects\nwod_characters> .\manage.py sqlmigrate characters 0005
.....
File "C:\Python34\lib\site-packages\django\db\migrations\state.py", line 71, in render
raise InvalidBasesError("Cannot resolve bases for %r\nThis can happen if you are inheriting models from an app with migrations (e.g. contrib.auth)
\n in an app with no migrations; see https://docs.djangoproject.com/en/1.7/topics/migrations/#dependencies for more" % new_unrendered_models)
django.db.migrations.state.InvalidBasesError: Cannot resolve bases for [<ModelState: 'characters.SpellDicePool'>]
This can happen if you are inheriting models from an app with migrations (e.g. contrib.auth)
in an app with no migrations; see https://docs.djangoproject.com/en/1.7/topics/migrations/#dependencies for more
我减少了对这个的迁移：
class Migration(migrations.Migration):
dependencies = [
('characters', '0004_remove_mage_arcana'),
]
operations = [
migrations.DeleteModel(
name='SpellDicePool',
),
migrations.RemoveField(
model_name='mage',
name='spells',
),
migrations.AddField(
model_name='spell',
name='contested',
field=models.BooleanField(default=False),
preserve_default=True,
),
migrations.AddField(
model_name='spell',
name='contested_attribute',
field=models.ForeignKey(related_name='spell_by_contested_attribute', default=None, to='characters.Attribute'),
preserve_default=True,
),
migrations.AddField(
model_name='spell',
name='contested_skill',
field=models.ForeignKey(related_name='spell_by_contested_skill', default=None, to='characters.Skill'),
preserve_default=True,
),
migrations.AddField(
model_name='spell',
name='mage',
field=models.ForeignKey(related_name='spell_by_mage', default=None, to='characters.Mage'),
preserve_default=False,
),
migrations.AddField(
model_name='spell',
name='resisted',
field=models.BooleanField(default=False),
preserve_default=True,
),
migrations.AddField(
model_name='spell',
name='resisted_by_attribute',
field=models.ForeignKey(related_name='dice_pools_by_resistance_attribute', default=None, to='characters.Attribute', choices=[('Mental', (('Intelligence', 'Intelligence'), ('Wits', 'Wits'), ('Resolve', 'Resolve'))), ('Physical', (('Strength', 'Strength'), ('Dexterity', 'Dexterity'), ('Stamina', 'Stamina'))), ('Social', (('Presence', 'Presence'), ('Manipulation', 'Manipulation'), ('Composure', 'Composure')))]),
preserve_default=False,
),
migrations.AddField(
model_name='spell',
name='rote_attribute',
field=models.ForeignKey(related_name='spell_by_rote_attribute', default=None, to='characters.Attribute', choices=[('Mental', (('Intelligence', 'Intelligence'), ('Wits', 'Wits'), ('Resolve', 'Resolve'))), ('Physical', (('Strength', 'Strength'), ('Dexterity', 'Dexterity'), ('Stamina', 'Stamina'))), ('Social', (('Presence', 'Presence'), ('Manipulation', 'Manipulation'), ('Composure', 'Composure')))]),
preserve_default=False,
),
migrations.AddField(
model_name='spell',
name='rote_skill',
field=models.ForeignKey(related_name='spell_by_rote_skill', default=None, to='characters.Skill', choices=[('Mental', (('Academics', 'Academics'), ('Computer', 'Computer'), ('Crafts', 'Crafts'), ('Investigation', 'Investigation'), ('Medicine', 'Medicine'), ('Occult', 'Occult'), ('Politics', 'Politics'), ('Science', 'Science'))), ('Physical', (('Athletics', 'Athletics'), ('Brawl', 'Brawl'), ('Drive', 'Drive'), ('Firearms', 'Firearms'), ('Larceny', 'Larceny'), ('Stealth', 'Stealth'), ('Survival', 'Survival'), ('Weaponry', 'Weaponry'))), ('Social', (('Animal Ken', 'Animal Ken'), ('Empathy', 'Empathy'), ('Expression', 'Expression'), ('Intimidation', 'Intimidation'), ('Persuasion', 'Persuasion'), ('Socialize', 'Socialize'), ('Streetwise', 'Streetwise'), ('Subterfuge', 'Subterfuge')))]),
preserve_default=False,
),
]
也就是说我删除了所有 migrations.RemoveField 方法，以及 DicePool 的 migrations.DeleteModel（逻辑上应该先删除）。
然后我 运行 manage.py makemigrations 又得到了这个 migration.py 文件：
class Migration(migrations.Migration):
dependencies = [
('characters', '0005_auto_20150129_1035'),
]
operations = [
migrations.RemoveField(
model_name='dicepool',
name='attribute',
),
migrations.RemoveField(
model_name='dicepool',
name='contested_dicepool',
),
migrations.RemoveField(
model_name='dicepool',
name='resisted_by_attribute',
),
migrations.RemoveField(
model_name='dicepool',
name='second_attribute',
),
migrations.RemoveField(
model_name='dicepool',
name='skill',
),
migrations.DeleteModel(
name='DicePool',
),
]
这基本上是我从原始 0005 迁移文件中删除的内容。
运行 迁移可以解决所有问题。
如果有人愿意帮我写票，因为这似乎是一个真正的错误，那将不胜感激。