向现有数据库添加字段 [英] Adding fields to an already existing database
问题描述
我使用Django，使用SQLite3作为数据库引擎。
I'm using Django, with SQLite3 as the database engine.
我试图向已经存在的模型类中添加一个新字段。这个类已经有数据关联。
I am trying to add a new field to an already existing model's class. This class already has data associated to it.
manage.py syncdb 没有将新字段添加到db
manage.py syncdb is not adding the new fields to the db.
是否有办法：
Add the new Field to the already existing class, and make sure a db entry is allocated to it?
使用空字符串填充所有已经存在的类的新字段db entries？
Populate this new field with an empty string for all the already existing db entries?
推荐答案
在你的django中安装south，现有表。请检查此
Install south in your django and you can easily handle the existing tables. check this
如果您真的想使用Django-South，在你的django上安装它之后，将你的新字段添加到你现有的模型运行
If you really want to use Django-South, install it on your django, after adding your new fields to your existing model run
python manage.py schemamigration --initial
python manage.py schemamigration --initial
它将在您的项目应用程序中创建一个文件。然后，
It will create a file in your project app. then,
python manage.py migrate
python manage.py migrate
这是你的表被改变。
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