Django MongoDB Django NoSQL议案

Django MongoDB Django NoSQL方案
1 安装MongoDB 

mongodb 主页 http://www.mongodb.org/

1，下载所需要的版本，地址：http://www.mongodb.org/display/DOCS/Downloads

（以windows为例,linux下应该比较简单）,可以参照官方文档：http://www.mongodb.org/display/DOCS/Home

2，将MongoDB加入环境变量

3，设定好放置数据库文件的路径，比如d:\db

4，打开CMD，不要关闭这个

<span style="font-family: 'Microsoft YaHei'; color: rgb(69, 69, 69); "> mongod --dbpath=d:\db\data</span>

5，开始mongo

<span style="font-family: 'Microsoft YaHei'; color: rgb(69, 69, 69); ">MongoDB shell version: 1.4.0 url: test connecting to: test type "exit" to exit type "help" for help ></span>如果出现这个就表示成功

不要关闭这个。

STEP 2 Django MongoDB

可参考的官方文档：http://django-mongodb.org/topics/setup.html

官方建议使用virtualenv，可以构建虚拟开发环境。（会创建独立目录的python环境）

另一原因，使用的是Django-nonrel。

<span style="font-family: 'Microsoft Yahei', 微软雅黑, Tahoma, Arial, Helvetica, STHeiti; color: rgb(69, 69, 69); ">pip install virtualenv</span>

创建环境
virtualenv myproject
linux的话,

<span style="font-family: 'Microsoft Yahei', 微软雅黑, Tahoma, Arial, Helvetica, STHeiti; color: rgb(69, 69, 69); ">source myproject/bin/activate </span>
windows需要打开Scripts 运行，再activate

安装django-nonrel

<span style="font-family: 'Microsoft Yahei', 微软雅黑, Tahoma, Arial, Helvetica, STHeiti; color: rgb(69, 69, 69); ">pip install hg+https://bitbucket.org/wkornewald/django-nonrel </span>安装djangotoolbox
pip install hg+https://bitbucket.org/wkornewald/djangotoolbox

安装mongodb-engine

pip install git+https://github.com/django-nonrel/mongodb-engine

windows的话，可以直接考虑(需要安装gitmecurial)和打开那三个网页然后下载文件，安装

<span style="font-family: 'Microsoft Yahei', 微软雅黑, Tahoma, Arial, Helvetica, STHeiti; color: rgb(69, 69, 69); ">python steup.py install</span>

安装完后，需要将djangotoolbox加入settings.py

修改settings.py

<span style="font-family: 'Microsoft Yahei', 微软雅黑, Tahoma, Arial, Helvetica, STHeiti; color: rgb(69, 69, 69); ">DATABASES = { 'default' : { 'ENGINE' : 'django_mongodb_engine', 'NAME' : 'my_database' } }</span>
更多的设置：http://django-mongodb.org/reference/settings.html

以及

<span style="font-family: 'Microsoft Yahei', 微软雅黑, Tahoma, Arial, Helvetica, STHeiti; color: rgb(69, 69, 69); ">manage.py syncdb</span>

STEP 3 测试

可参考的中文文档：http://cn.docs.mongodb.org/manual/tutorial/write-a-tumblelog-application-with-django-mongodb-engine/

创建一个新的app，然后修改models.py

<span style="font-family: 'Microsoft YaHei'; "><span style="font-size:12px;">from django.db import models from django.core.urlresolvers import reverse from djangotoolbox.fields import ListField, EmbeddedModelField class Post(models.Model): created_at = models.DateTimeField(auto_now_add=True, db_index=True) title = models.CharField(max_length=255) slug = models.SlugField() body = models.TextField() comments = ListField(EmbeddedModelField('Comment'), editable=False) def get_absolute_url(self): return reverse('post', kwargs={"slug": self.slug}) def __unicode__(self): return self.title class Meta: ordering = ["-created_at"] class Comment(models.Model): created_at = models.DateTimeField(auto_now_add=True) body = models.TextField(verbose_name="Comment") author = models.CharField(verbose_name="Name", max_length=255)</span></span>
 添加数据

<span style="font-family: 'Microsoft YaHei'; "><span style="font-size:12px;">manage.py shell</span></span>

创建帖子

<span style="font-family: 'Microsoft YaHei'; "><span style="font-size:12px;">>>> from tumblelog.models import * >>> post = Post( ... title="Hello World!", ... slug="hello-world", ... body = "Welcome to my new shiny Tumble log powered by MongoDB and Django-MongoDB!" ... ) >>> post.save()</span></span>
创建评论

<span style="font-family: 'Microsoft YaHei'; "><span style="font-size:12px;">>>> post.comments [] >>> comment = Comment( ... author="Joe Bloggs", ... body="Great post! I'm looking forward to reading your blog") >>> post.comments.append(comment) >>> post.save()</span></span>
检查帖子

<span style="font-family: 'Microsoft YaHei'; "><span style="font-size:12px;"></span></span><pre name="code" class="python"><span style="font-family: 'Microsoft YaHei'; "><span style="font-size:12px;">>>> post = Post.objects.get() >>> post <Post: Hello World!> >>> post.comments [<Comment: Comment object>]</span></span></pre>

总结：还是不想用，虽然一直想知道原理。但是和想象中的有差距。