如何将sqllite3数据库迁移到mysql数据库
一.安装python mysql module (OneDrive):
1.运行python D:\OneDrive\Work\django\mysqlregistry.py
2.http://www.dlldll.com/ 下载libguide40.dll和 libmmd.dll这两个文件,然后拷贝到C:\WINDOWS/system32/ 目录下
3.http://www.codegood.com/downloads 下载MySQL-python x64
二.准备好mysql数据库:
0.新建mgmt数据库:
CREATE DATABASE mgmt CHARACTER SET utf8 COLLATE utf8_general_ci; (注意字符格式)
1.编辑settings.py,添加要迁移到的新数据库:
DATABASES = { 'default': { 'ENGINE': 'django.db.backends.sqlite3', 'NAME': os.path.join(BASE_DIR, 'db.sqlite3'), }, 'mgmtdb':{ #配置第二个数据库节点名称 'ENGINE': 'django.db.backends.mysql', 'NAME': 'mgmt', #第二个数据库的名称 'USER': 'user', 'PASSWORD': 'pass', 'HOST':'10.16.2.1', 'PORT':'3306', } }
2.在新数据库mgmt中新建表(使用syncdb命令同步):
python manage.py syncdb --database mgmt
3.在项目根目录新建migratedb.py,如下:
#!/usr/bin/env python from django.contrib.contenttypes.models import ContentType def run(): def do(Table): if Table is not None: table_objects = Table.objects.all() for i in table_objects: i.save(using='mgmtdb') #注意修改数据库节点名称 ContentType.objects.using('mgmtdb').all().delete() #注意修改数据库节点名称 for i in ContentType.objects.all(): do(i.model_class())
4.同步表数据:
python manage.py shell
from migratedb import run
run()
之后在mysql中可以看到新建的表,表为空
5.将mgmt数据库更改为默认数据库:
DATABASES = { 'default': { 'ENGINE': 'django.db.backends.mysql', 'NAME': 'mgmt', #数据库名称 'USER': 'user', 'PASSWORD': 'pass', 'HOST':'10.16.2.1', 'PORT':'3306', } }
出现以下警告,有几个字段被截断(暂未理会):
C:\Python27\lib\site-packages\django-1.8.4-py2.7.egg\django\db\backends\mysql\base.py:124: Warning: Data truncated for column 'SN' at row 1 return self.cursor.execute(query, args) C:\Python27\lib\site-packages\django-1.8.4-py2.7.egg\django\db\backends\mysql\base.py:124: Warning: Data truncated for column 'publicPort' at row 1 return self.cursor.execute(query, args) C:\Python27\lib\site-packages\django-1.8.4-py2.7.egg\django\db\backends\mysql\base.py:124: Warning: Data truncated for column 'privatePort' at row 1 return self.cursor.execute(query, args)