Django:ProgrammingError:列“ id”不存在 [英] Django : ProgrammingError: column "id" does not exist
问题描述
我尝试使用postgresql数据库(在拥有SQLite之前),但是当我执行 python manage.py migration
时出现一条消息:
I try to use postgresql database (before I had SQLite) but I have a message when I execute python manage.py migrate
:
Operations to perform:
Apply all migrations: sessions, admin, sites, auth, contenttypes, main_app
Running migrations:
Rendering model states... DONE
Applying main_app.0004_auto_20161002_0034...Traceback (most recent call last):
File "manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 353, in execute_from_command_line
utility.execute()
File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 345, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 348, in run_from_argv
self.execute(*args, **cmd_options)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 399, in execute
output = self.handle(*args, **options)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/commands/migrate.py", line 200, in handle
executor.migrate(targets, plan, fake=fake, fake_initial=fake_initial)
File "/usr/local/lib/python2.7/dist-packages/django/db/migrations/executor.py", line 92, in migrate
self._migrate_all_forwards(plan, full_plan, fake=fake, fake_initial=fake_initial)
File "/usr/local/lib/python2.7/dist-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 "/usr/local/lib/python2.7/dist-packages/django/db/migrations/executor.py", line 198, in apply_migration
state = migration.apply(state, schema_editor)
File "/usr/local/lib/python2.7/dist-packages/django/db/migrations/migration.py", line 123, in apply
operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
File "/usr/local/lib/python2.7/dist-packages/django/db/migrations/operations/fields.py", line 201, in database_forwards
schema_editor.alter_field(from_model, from_field, to_field)
File "/usr/local/lib/python2.7/dist-packages/django/db/backends/base/schema.py", line 482, in alter_field
old_db_params, new_db_params, strict)
File "/usr/local/lib/python2.7/dist-packages/django/db/backends/postgresql/schema.py", line 110, in _alter_field
new_db_params, strict,
File "/usr/local/lib/python2.7/dist-packages/django/db/backends/base/schema.py", line 634, in _alter_field
params,
File "/usr/local/lib/python2.7/dist-packages/django/db/backends/base/schema.py", line 110, in execute
cursor.execute(sql, params)
File "/usr/local/lib/python2.7/dist-packages/django/db/backends/utils.py", line 79, in execute
return super(CursorDebugWrapper, self).execute(sql, params)
File "/usr/local/lib/python2.7/dist-packages/django/db/backends/utils.py", line 64, in execute
return self.cursor.execute(sql, params)
File "/usr/local/lib/python2.7/dist-packages/django/db/utils.py", line 95, in __exit__
six.reraise(dj_exc_type, dj_exc_value, traceback)
File "/usr/local/lib/python2.7/dist-packages/django/db/backends/utils.py", line 64, in execute
return self.cursor.execute(sql, params)
django.db.utils.ProgrammingError: column "id" does not exist
LINE 1: ..._app_projet" ALTER COLUMN "id" TYPE integer USING "id"::inte...
所以我想这个错误是关于我的模型'Projet'的,但是这个模型有ID字段!我在 0001_initial.py 中看到了这一点:
So I guess this error is about my model 'Projet' but this model has ID field ! I see that in 0001_initial.py :
...
migrations.CreateModel(
name='Projet',
fields=[
('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
('name', models.CharField(db_index=True, max_length=30)),
('presentation', models.TextField(max_length=2500, null=True)),
...
我的迁移main_app.0004_auto_20161002_0034:
My migration main_app.0004_auto_20161002_0034 :
class Migration(migrations.Migration):
dependencies = [
('main_app', '0003_auto_20161002_0033'),
]
operations = [
migrations.AlterField(
model_name='projet',
name='id',
field=models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID'),
),
]
Projet模型就像这样:
Projet model is like that :
class Group(models.Model) :
name = models.CharField(max_length=30, db_index=True)
class Meta :
abstract = True
unique_together = (("id", "name"),)
class Projet(Group) :
presentation = models.TextField(max_length=2500, null=True)
真的,我不明白为什么会出现此错误...我的设置配置数据库很好,所有其他模型都可以工作,...
Realy I don't understand why I have this error... my settings configuration database is good, all others models work, ...
如果我忘记了一些东西,请不要犹豫告诉我!我真的需要您的帮助!
If I forgot something, please don't hesitate to tell me ! I need realy your helps !
推荐答案
您的模型定义未将任何字段标识为主键,因此Django假定一个名为 id
的主键列。但是,此列实际上并不存在于表中。
Your model definition doesn't identify any of the fields as a primary key, therefore Django assumes a primary key column named id
. However this column doesn't actually exist in the table.
更改模型定义以将字段之一指定为主键,而Django不会尝试查找 id
列。
Change your model definition to designate one of the fields as a primary key, and Django won't try to look for an id
column.
这篇关于Django:ProgrammingError:列“ id”不存在的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!