Django重置不删除表

Question

我刚刚将开发环境从Ubuntu Linux迁移到Mac OSX雪豹。 所有这些都在Linux上进行。 在这两个方面，我都将MySQL用于Django的数据库。

Django的reset函数不会为我所有应用程序模型发出drop命令。 这是我的models.py（为了简洁起见，删除了Forum和User对象字段）：

from django.db import models

class Forum(models.Model):
    ...

class User(models.Model):
    ...

class Message(models.Model):
    date = models.DateTimeField()
    content_file = models.CharField(max_length=48)
    summary_file = models.CharField(max_length=48)
    user = models.ForeignKey(User)    
    thread = models.ForeignKey('self', blank=True, null=True)
    lft = models.IntegerField(default=1) 
    rgt = models.IntegerField(default=2)

    def __unicode__(self):
        return str(self.date) + '_' + unicode(self.user)

class Message_forum(models.Model):
    message = models.ForeignKey(Message)
    forum = models.ForeignKey(Forum)
    status = models.IntegerField()
    position = models.IntegerField(blank=True, null=True)

    def __unicode__(self):
        return unicode(self.message) + '_' + unicode(self.forum)

这是django的sql命令的输出：

BEGIN;
CREATE TABLE `AO_forum` (
    ...
)
;
CREATE TABLE `AO_user` (
    ...
)
;
CREATE TABLE `AO_message` (
    `id` integer AUTO_INCREMENT NOT NULL PRIMARY KEY,
    `date` datetime NOT NULL,
    `content_file` varchar(48) NOT NULL,
    `summary_file` varchar(48) NOT NULL,
    `user_id` integer NOT NULL,
    `thread_id` integer,
    `lft` integer NOT NULL,
    `rgt` integer NOT NULL
)
;
ALTER TABLE `AO_message` ADD CONSTRAINT `user_id_refs_id_12d253fe` FOREIGN KEY (`user_id`) REFERENCES `AO_user` (`id`);
ALTER TABLE `AO_message` ADD CONSTRAINT `thread_id_refs_id_12262c89` FOREIGN KEY (`thread_id`) REFERENCES `AO_message` (`id`);
CREATE TABLE `AO_message_forum` (
    `id` integer AUTO_INCREMENT NOT NULL PRIMARY KEY,
    `message_id` integer NOT NULL,
    `forum_id` integer NOT NULL,
    `status` integer NOT NULL,
    `position` integer
)
;
ALTER TABLE `AO_message_forum` ADD CONSTRAINT `message_id_refs_id_68762267` FOREIGN KEY (`message_id`) REFERENCES `AO_message` (`id`);
ALTER TABLE `AO_message_forum` ADD CONSTRAINT `forum_id_refs_id_31073c3d` FOREIGN KEY (`forum_id`) REFERENCES `AO_forum` (`id`);
COMMIT;

这是django的sqlreset命令的输出：

BEGIN;
DROP TABLE `AO_user`;
DROP TABLE `AO_forum`;
CREATE TABLE `AO_forum` (
    ...
)
;
CREATE TABLE `AO_user` (
    ...
)
;
CREATE TABLE `AO_message` (
    `id` integer AUTO_INCREMENT NOT NULL PRIMARY KEY,
    `date` datetime NOT NULL,
    `content_file` varchar(48) NOT NULL,
    `summary_file` varchar(48) NOT NULL,
    `user_id` integer NOT NULL,
    `thread_id` integer,
    `lft` integer NOT NULL,
    `rgt` integer NOT NULL
)
;
ALTER TABLE `AO_message` ADD CONSTRAINT `user_id_refs_id_12d253fe` FOREIGN KEY (`user_id`) REFERENCES `AO_user` (`id`);
ALTER TABLE `AO_message` ADD CONSTRAINT `thread_id_refs_id_12262c89` FOREIGN KEY (`thread_id`) REFERENCES `AO_message` (`id`);
CREATE TABLE `AO_message_forum` (
    `id` integer AUTO_INCREMENT NOT NULL PRIMARY KEY,
    `message_id` integer NOT NULL,
    `forum_id` integer NOT NULL,
    `status` integer NOT NULL,
    `position` integer
)
;
ALTER TABLE `AO_message_forum` ADD CONSTRAINT `message_id_refs_id_68762267` FOREIGN KEY (`message_id`) REFERENCES `AO_message` (`id`);
ALTER TABLE `AO_message_forum` ADD CONSTRAINT `forum_id_refs_id_31073c3d` FOREIGN KEY (`forum_id`) REFERENCES `AO_forum` (`id`);
CREATE INDEX `AO_message_user_id` ON `AO_message` (`user_id`);
CREATE INDEX `AO_message_thread_id` ON `AO_message` (`thread_id`);
CREATE INDEX `AO_message_forum_message_id` ON `AO_message_forum` (`message_id`);
CREATE INDEX `AO_message_forum_forum_id` ON `AO_message_forum` (`forum_id`);
COMMIT;

仅生成用于论坛和用户的放置命令。 同样令人困惑并且可能相关的是，在创建表时，我的Django项目名称（“ AO”）附加在论坛和用户表的所有大写字母中，但以小写形式附加在message和message_forum表中（这是没有删除的表名）命令）。

Answer 1

用这个

heroku pg:reset SHARED_DATABASE --confirm my_great_app

用您的应用名称替换my_great_app