相关疑难解决方法(0)

在Django 1.8项目中,当有以下代码时,我的迁移工作正常:

# -*- coding: utf-8 -*-
from __future__ import unicode_literals

from django.db import migrations
from django.conf import settings


def update_site_forward(apps, schema_editor):
    """Add group osmaxx."""
    Group = apps.get_model("auth", "Group")
    Group.objects.create(name=settings.OSMAXX_FRONTEND_USER_GROUP)


def update_site_backward(apps, schema_editor):
    """Revert add group osmaxx."""
    Group = apps.get_model("auth", "Group")
    Group.objects.get(name=settings.OSMAXX_FRONTEND_USER_GROUP).delete()


class Migration(migrations.Migration):

    dependencies = [
        ('auth', '0001_initial'),
    ]

    operations = [
        migrations.RunPython(update_site_forward, update_site_backward),
    ]

此组是在迁移中创建的,因为它应在Web应用程序的所有安装中可用.为了使它更有用,我还想给它一个默认权限,所以我改为update_site_forward:

def update_site_forward(apps, schema_editor):
    """Add group osmaxx."""
    Group = apps.get_model("auth", "Group")
    Permission = apps.get_model("auth", "Permission")
    ContentType = apps.get_model("contenttypes", "ContentType")
    ExtractionOrder …

我想在手动编写的迁移中添加一些组并为其分配权限,但如果我在干净的DB上运行它,则只有在运行所有迁移后才会创建权限.

我找到了这张票:https: //code.djangoproject.com/ticket/23422但我不能在那里发表评论(我可能会在表达对GeoDjango文档的不满之后被禁止),所以我将分享对解决方案的改进在下面.