Django Sites Framework:初始数据迁移位置

Question

在Django 1.7之前,当使用Django Sites Framework时,可以/应该使用Initial Fixtures定义初始数据.

的myproject /装置/ initial_data.json

[
{
    "pk": 1, 
    "model": "sites.site", 
    "fields": {
        "domain": "domain1", 
        "name": "name1"
    }
},
{
    "pk": 2, 
    "model": "sites.site", 
    "fields": {
        "domain": "domain2", 
        "name": "name2"
    }
},
{
    "pk": 3, 
    "model": "sites.site", 
    "fields": {
        "domain": "domain3", 
        "name": "name3"
    }
}
]

由于它是一个全局项目设置,我在项目根目录中添加了一个"fixtures"文件夹,并将其添加到FIXTURE_DIRS.

# Used to search fixture files directories.
# Fixture files are files that provide initial data to be
# inserted in the database. (>python manage.py loaddata)

    FIXTURE_DIRS = [
        os.path.join(PROJECT_ROOT, "fixtures"),
    ]

现在,我正在使用Django 1.7,建议使用迁移.引用Django文档:

要为项目设置正确的名称和域,可以使用数据迁移.

问题是迁移是特定于应用程序的:

python manage.py makemigrations --empty yourappname

那么,使用数据迁移将站点信息添加到项目的建议方法是什么？迁移应该在哪里生活？

运行python manage.py makemigrations --empty sites会在第三方应用程序文件夹中创建迁移,因此我们不希望这样.

不应该为initial_data定义MIGRATION_DIRS,因为FIXTURE_DIRS存在？

我在设置文档中找到了MIGRATION_MODULES,但问题仍然存在,它是特定于应用程序的.

Answer 1

首先,MODULE_MIGRATIONS在django设置中进行配置:

MIGRATION_MODULES = {
    'sites': 'myproject.fixtures.sites_migrations',
}

然后,运行./manage.py makemigrations sites让django创建目录并0001_intitial.py在myproject.fixtures.sites_migrations包中创建.

然后,做./manage.py makemigrations --empty sites.应在指定的包中创建迁移文件.

我的文件0002_initialize_sites.py看起来像这样:

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

from django.db import migrations


def insert_sites(apps, schema_editor):
    """Populate the sites model"""
    Site = apps.get_model('sites', 'Site')
    Site.objects.all().delete()

    # Register SITE_ID = 1
    Site.objects.create(domain='create.tourtodo.com', name='create')
    # Register SITE_ID = 2
    Site.objects.create(domain='www.tourtodo.com', name='www')


class Migration(migrations.Migration):

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

    operations = [
        migrations.RunPython(insert_sites)
    ]

Answer 2

您只需要引用编号最高的sites迁移作为依赖项。

def forward(apps, schema_editor):
    Site = apps.get_model("sites", "Site")
    db_alias = schema_editor.connection.alias
    s, created = Site.objects.using(db_alias).get_or_create(pk=1)
    s.name = APP_NAME
    s.domain = APP_NAME
    s.save()


def reverse(apps, schema_editor):
    Site = apps.get_model("sites", "Site")
    db_alias = schema_editor.connection.alias
    s = Site.objects.using(db_alias).get(pk=1)
    s.name = ORIG_APP_NAME
    s.domain = ORIG_APP_NAME
    s.save()


class Migration(migrations.Migration):

    dependencies = [

        # `core` is the app containing this migration
        ('core', '0001_initial'),

        # `0002_alter_domain_unique` is the highest-numbered migration for
        # the sites framework
        ('sites', '0002_alter_domain_unique'),

    ]

    operations = [
        migrations.RunPython(forward, reverse)
    ]

这是在 Django 1.11.2 上测试过的。

Fwiw，MODULE_MIGRATIONS上面的解决方案对我不起作用。