django整合原有的mysql数据库

虽然django适合从零开始构建一个项目，但有时候整合原有的数据库也在所难免，下面以django整合我的mysql作说明。

mysql数据是我从京东上抓取的数据，数据表名为jd，演示如图

下面将jd整合到django中，操作如下

1.修改settings.py

root@iZ28b5osxspZ:/home/jd# vim jd/settings.py
...
DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql',
        #'NAME': os.path.join(BASE_DIR, "jd.sql"),
        'NAME':'jd',
        'HOST':'127.0.0.1',
        'PORT':3306,
        'USER':'root',
        'PASSWORD':'hehe',
    }
}
...

2.针对已有数据库自省生成新的models

root@iZ28b5osxspZ:/home/jd# python manage.py inspectdb
# This is an auto-generated Django model module.
# You'll have to do the following manually to clean this up:
#   * Rearrange models' order
#   * Make sure each model has one field with primary_key=True
#   * Remove `managed = False` lines if you wish to allow Django to create, modify, and delete the table
# Feel free to rename the models, but don't rename db_table values or field names.
#

▽
# You'll have to do the following manually to clean this up:
# Also note: You'll have to insert the output of 'django-admin.py sqlcustom [app_label]'
# into your database.
from __future__ import unicode_literals

from django.db import models


class Jd(models.Model):

▽
    id = models.IntegerField(primary_key=True)  # AutoField?

▽
    category = models.CharField(max_length=64, blank=True)

▽
#   * Make sure each model has one field with primary_key=True
    name = models.CharField(max_length=128, blank=True)
    price = models.CharField(max_length=64, blank=True)
    url = models.CharField(max_length=64, blank=True)

    class Meta:
        managed = False
        db_table = 'jd'
root@iZ28b5osxspZ:/home/jd#

3.导出模型并代替models.py

root@iZ28b5osxspZ:/home/jd# python manage.py inspectdb > models.py
root@iZ28b5osxspZ:/home/jd# ls
jd  main  manage.py  models.py
root@iZ28b5osxspZ:/home/jd# mv models.py main/

4.默认配置下生成不可修改/删除的models，修改meta class中的managed＝True则告诉django可以对数据库进行操作

root@iZ28b5osxspZ:/home/jd# python manage.py migrate
Operations to perform:
  Apply all migrations: admin, contenttypes, auth, sessions
Running migrations:
  Applying contenttypes.0001_initial... OK
  Applying auth.0001_initial... OK
  Applying admin.0001_initial... OK
  Applying sessions.0001_initial... OK
root@iZ28b5osxspZ:/home/jd# python manage.py shell
Python 2.7.6 (default, Mar 22 2014, 22:59:56)
Type "copyright", "credits" or "license" for more information.

IPython 1.2.1 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object', use 'object??' for extra details.

5.是不是真的可以操作原有数据库了呢？进行验证即可

root@iZ28b5osxspZ:/home/jd# python manage.py shell
Python 2.7.6 (default, Mar 22 2014, 22:59:56)
Type "copyright", "credits" or "license" for more information.

IPython 1.2.1 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object', use 'object??' for extra details.



In [1]: from main.models import Jd

In [2]: Jd.objects.all()
Out[2]: [, , , , , , , , , , , , , , , , , , , , '...(remaining elements truncated)...']