[英]Django manage.py sqlclear omit some tables
I wrote python script for dropping tables in all Django apps. 我编写了python脚本来删除所有Django应用程序中的表。 (using settings.INSTALLED_APP)
(使用settings.INSTALLED_APP)
https://gist.github.com/1520683 https://gist.github.com/1520683
My django project creates 41 tables after running manage.py syncdb
, but my script says only 40 tables will be dropped. 我的django项目在运行
manage.py syncdb
之后创建了41个表,但是我的脚本说只删除了40个表。 So, I examined the result of sqlall
and result of sqlclear
. 所以,我检查的结果
sqlall
和结果sqlclear
。 And I revealed sqlclear
omits one table that stores ManyToManyField
relationship. 我透露
sqlclear
省略了一个存储ManyToManyField
关系的表。
I knew that drop database
is much simpler than the above script. 我知道
drop database
比上面的脚本简单得多。 But I confused why django admin or manage script omit some tables while running sql commands. 但我很困惑为什么django管理或管理脚本在运行sql命令时省略了一些表。
Below model creates common_userbook_purchasedBooks
table while running syncdb
, but not in sqlclear
command. 下面的模型在运行
syncdb
创建common_userbook_purchasedBooks
表,但在sqlclear
命令中没有。
class UserBook(models.Model):
user = models.OneToOneField(User)
purchasedBooks = models.ManyToManyField(Book)
Added) So, I'm using an alternative approach for this. 补充)所以,我正在使用另一种方法。 https://gist.github.com/1520810
https://gist.github.com/1520810
lqez, I gues this issue related to you local environment, because for Django 1.3.1, Python 2.7.2 lqez,我猜这个问题与你的本地环境有关,因为对于Django 1.3.1,Python 2.7.2
for models 对于模型
from django.contrib.auth.models import User
from django.db import models
class Book(models.Model):
name = models.CharField(max_length=10)
class UserBook(models.Model):
user = models.OneToOneField(User)
purchasedBooks = models.ManyToManyField(Book)
when I run (.env)testme$ ./manage.py sqlclear testapp
output looks like 当我运行
(.env)testme$ ./manage.py sqlclear testapp
输出看起来像
BEGIN;
DROP TABLE "testapp_userbook";
DROP TABLE "testapp_userbook_purchasedBooks";
DROP TABLE "testapp_book";
COMMIT;
BEGIN;
ALTER TABLE "testapp_userbook_purchasedBooks" DROP CONSTRAINT "userbook_id_refs_id_8bda4b0";
DROP TABLE "testapp_userbook";
DROP TABLE "testapp_userbook_purchasedBooks";
DROP TABLE "testapp_book";
COMMIT;
BEGIN;
ALTER TABLE `testapp_userbook_purchasedBooks` DROP FOREIGN KEY `userbook_id_refs_id_8bda4b0`;
DROP TABLE `testapp_userbook`;
DROP TABLE `testapp_userbook_purchasedBooks`;
DROP TABLE `testapp_book`;
COMMIT;
Also your script can be a little bit improved using introspection
: 使用
introspection
也可以稍微改进你的脚本:
from django.db import connection
cursor = connection.cursor()
connection.introspection.get_table_list(cursor)
[u'auth_group', u'auth_group_permissions', u'auth_message', u'auth_permission', u'auth_user', u'auth_user_groups', u'auth_user_user_permissions', u'django_content_type', u'django_session', u'django_site', u'testapp_book', u'testapp_userbook', u'testapp_userbook_purchasedBooks']
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