学习go语言，官网golang，官网文档写的非常全面，我这里只是记录自己的一个学习过程
搭建本地开发环境
安装golang
easy_install django
下载安装本地开发环境
git clone https://github.com/SAEPython/saepythondevguide.git
cd dev_server
python setup.py install
创建python项目
到sae.sina.com.cn下创建一个python项目
进入管理面板创建版本，版本号为1
使用svn下载代码
svn co https://svn.sinaapp.com/xxxxx/
进入主目录，发现一个1的文件夹，这个就是对应的django的工程目录
django-admin.py start project mysite
mv mysite/* 1
在1下创建配置文件config.yaml，并写入如下内容
libraries:
- name: "django"
version: "1.4"
在1下创建index.wsgi，内容如下
import sae
from mysite import wsgi
application = sae.create_wsgi_app(wsgi.application)
项目创建完毕，在1中执行dev_server.py来启动sae项目，默认localhost:8080访问
我在这里遇到一个问题，我是用Windows虚拟的Linux，所以我在Windows下无法通过ip:8080访问到linux。看了d>ev_server.py的代码发现这里host是写死为localhost的，所以我将代码小改动了一下
#/usr/local/lib/python2.7/dist-packages/sae_python_dev.../EGG-INFO/scripts/dev_server.py
run_simple(option.host, options.port...)
if __name__ == '__main__':
parser = Option.Parser()
parser.add_option("--host",dest="host",default="localhost")
这样就能通过增加--host，将外部访问的ip设定好了
实现一个简单的投票应用
在1目录下，创建应用
python manage.py startapp polls
修改配置文件settings
import os
if 'SERVER_SOFTWARE' in os.environ:
from sae.const import(
MYSQL_HOST,
MYSQL_PORT,
MYSQL_USER,
MYSQL_PASS,
MYSQL_DB
)
else:
MYSQL_HOST = "localhost"
MYSQL_PORT = "3306"
MYSQL_USER = "root"
MYSQL_PASS = "xxxxx"
MYSQL_DB = "app_polls"
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.mysql',
'NAME': MYSQL_DB,
'USER': MYSQL_USER,
'PASSWORD': MYSQL_PASS,
'HOST': MYSQL_HOST,
'PORT': MYSQL_PORT,
}
}
...
TEMPLATE_DIRS = (
# Put strings here, like "/home/html/django_templates" or "C:/www/django/templates".
# Always use forward slashes, even on Windows.
# Don't forget to use absolute paths, not relative paths.
os.path.join(os.path.dirname(__file__), 'templates'),
)
INSTALLED_APPS = (
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.sites',
'django.contrib.messages',
'django.contrib.staticfiles',
# Uncomment the next line to enable the admin:
'django.contrib.admin',
# Uncomment the next line to enable admin documentation:
# 'django.contrib.admindocs',
'polls'
)
这里的配置项主要是将SAE和本地开发环境区分开，在SAE环境下使用它们提供的变量就可以直接连接数据库了，不过记得要在SAE控制面板进行初始化
配置主urls，即mysite下的urls
from django.conf.urls import patterns, include, url
from django.contrib import admin
admin.autodiscover()
urlpatterns = patterns('',
url(r'^admin/', include(admin.site.urls)),
url(r'^polls/', include('polls.urls')),
)
在polls文件夹下修改urls
from django.conf.urls import patterns, url
urlpatterns = patterns('polls.views',
url(r'^$', 'index'),
url(r'^(?P<poll_id>\d+)/$', 'detail'),
url(r'^(?P<poll_id>\d+)/results/$', 'results'),
url(r'^(?P<poll_id>\d+)/vote/$', 'vote'),
)
在polls文件夹下创建model.py
from django.db import models
class Poll(models.Model):
question = models.CharField(max_length=200)
pub_date = models.DateTimeField('date published')
class Choice(models.Model):
poll = models.ForeignKey(Poll)
choice = models.CharField(max_length=200)
votes = models.IntegerField()
然后在mysql中创建一个add_polls数据库，使用
python manage.py syncdb
同步数据库，这个仅限本地，如果要在sae使用的话，需要本地生成后导入到sae上。
在polls文件夹下创建view视图文件
from django.shortcuts import render_to_response, get_object_or_404
from django.template import RequestContext
from django.http import HttpResponseRedirect
from django.core.urlresolvers import reverse
from polls.models import Poll, Choice
#主页显示最新的5条投票列表
def index(request):
latest_poll_list = Poll.objects.all().order_by('-pub_date')[:5]
return render_to_response('index.html', {'latest_poll_list': latest_poll_list})
#获得某条信息详细情况
def detail(request, poll_id):
p = get_object_or_404(Poll, pk=poll_id)
return render_to_response('detail.html', {'poll': p},
context_instance=RequestContext(request))
#投票
def vote(request, poll_id):
p = get_object_or_404(Poll, pk=poll_id)
try:
selected_choice = p.choice_set.get(pk=request.POST['choice'])
except (KeyError, Choice.DoesNotExist):
return render_to_response('detail.html', {
'poll': p,
'error_message': "You didn't select a choice.",
}, context_instance=RequestContext(request))
else:
selected_choice.votes += 1
selected_choice.save()
return HttpResponseRedirect(reverse('polls.views.results', args=(p.id,)))
#显示投票结果
def results(request, poll_id):
p = get_object_or_404(Poll, pk=poll_id)
return render_to_response('results.html', {'poll': p})
在polls下创建templates文件夹，并创建以下三个文件
detail.html
<h1>{{ poll.question }}</h1>
{% if error_message %}<p><strong>{{ error_message }}</strong></p>{% endif %}
<form action="/polls/{{ poll.id }}/vote/" method="post">
{% csrf_token %}
{% for choice in poll.choice_set.all %}
<input type="radio" name="choice" id="choice{{ forloop.counter }}" value="{{ choice.id }}" />
<label for="choice{{ forloop.counter }}">{{ choice.choice }}</label><br />
{% endfor %}
<input type="submit" value="Vote" />
</form>
index.html
{% if latest_poll_list %}
<ul>
{% for poll in latest_poll_list %}
<li><a href="/polls/{{ poll.id }}/">{{ poll.question }}</a></li>
{% endfor %}
</ul>
{% else %}
<p>No polls are available.</p>
{% endif %}
results.html
<h1>{{ poll.question }}</h1>
<ul>
{% for choice in poll.choice_set.all %}
<li>{{ choice.choice }} -- {{ choice.votes }} vote{{ choice.votes|pluralize }}</li>
{% endfor %}
</ul>
<a href="/polls/{{ poll.id }}/">Vote again?</a>
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