基于Django1.11和Python3
短信预约 -IT技能 免费直播动态提醒
一、创建一个VotingSystem项目以及polls应用
$ django-admin.py startproject VotingSystem
$ cd VotingSystem
$ python3 manage.py startapp polls注：如果使用Pycharm来创建的话，以上两步都可以省略
二、配置tempaltes路径（如果没有）
a. 先在VotingSystem项目目录下新建一个templates文件夹，注意文件夹权限和属组
$ sudo mkdir templatesb. 然后再setting.py文件中添加路径
TEMPLATES = [
{
...
'DIRS': [os.path.join(BASE_DIR, 'templates')]
...
},
]三、将应用名称添加到setting.py文件INSTALLED_APPS选项末尾（如果没有）
INSTALLED_APPS = [
...
'polls',
]注：以上两步如果用Pycharm都可以一步到位
四、编辑polls/model.py，创建数据库模型
from django.db import models
# 问题
class Question(models.Model):
question_text = models.CharField(max_length=200)
# 双引号中定义的是在admin页面显示的verbose_name
pub_date = models.DateTimeField("date published")
def __str__(self):
return self.question_text
# 问题选项
class Choice(models.Model):
question = models.ForeignKey("Question")
choice_text = models.CharField(max_length=200)
votes = models.IntegerField(default=0)
def __str__(self):
return self.choice_text五、同步数据库，生成数据库表（这里使用的是默认的sqlite3）
$ python3 manage.py makemigrations
$ python3 manage.py migrate六、生成admin管理账户
$ python3 manage.py createsuperuser七、将model注册到admin中
from django.contrib import admin
from .models import *
class ChoiceInline(admin.TabularInline):
model = Choice
extra = 3 # 在admin页面显示额外三个空白表单
class QuestionAdmin(admin.ModelAdmin):
fieldsets = [
(None, {'fields': ['question_text']}),
('Date information', {'fields': ['pub_date'], 'classes': ['collapse']}),
]
inlines = [ChoiceInline,] # 在admin页面显示内联
list_display = ('question_text', 'pub_date')
admin.site.register(Question, QuestionAdmin)
admin.site.register(Choice)八、启动server，进入admin页面，创建一些问题和选项
$ python3 manage.py runserver
九、编辑VotingSystem/urls.py，使用路由分发和命名空间
from django.conf.urls import url, include
from django.contrib import admin
urlpatterns = [
url(r'^admin/', admin.site.urls),
url(r'^polls/', include("polls.urls", namespace="polls")),
]十、编辑polls/urls.py
from django.conf.urls import url
from polls import views
urlpatterns = [
url(r'^$', views.index, name="index"),
url(r'^(?P<question_id>[0-9]+)/$', views.detail, name="detail"),
url(r'^(?P<question_id>[0-9]+)/results/$', views.results, name="results"),
url(r'^(?P<question_id>[0-9]+)/vote/$', views.vote, name="vote"),
]十一、编辑polls/views.py视图文件
from django.shortcuts import render, get_object_or_404, HttpResponseRedirect, reverse, redirect
from .models import *
# 首页，展示所有问题
def index(req):
lastest_question_list = Question.objects.all()
return render(req, "polls/index.html", locals())
# 展示单个问题的所有选项
def detail(req, question_id):
question = get_object_or_404(Question, pk=question_id)
return render(req, "polls/detail.html", locals())
# 查看投票结果，
def results(req, question_id):
question = get_object_or_404(Question, pk=question_id)
return render(req, "polls/results.html", locals())
# 选择投票，设置cookie验证
def vote(req, question_id):
p = get_object_or_404(Question, pk=question_id)
if req.COOKIES.get("is_vote", None):
return render(req, "polls/detail.html", {"question": p, "error_message": "你已经投过票了!"})
try:
selected_choice = p.choice_set.get(pk=req.POST['choice'])
except (KeyError, Choice.DoesNotExist):
return render(req, "polls/detail.html", {"question": p, "error_message": "You did't select a choice"})
else:
selected_choice.votes += 1
selected_choice.save()
rep = redirect(reverse("polls:results", args=(p.id,)))
rep.set_cookie("is_vote", True)
return rep十二、在templates目录下创建polls目录，在polls目录下创建index.html detail.html results.html三个HTML文件
index.html:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
{% if lastest_question_list %}
<ul>
{% for question in lastest_question_list %}
<li><a href="{% url 'polls:detail' question.id %}">{{ question.question_text }}</a></li>
{% endfor %}
</ul>
{% else %}
<p>No polls are avaiable.</p>
{% endif %}
</body>
</html>detail.html:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>{{ question.question_text }}</h1>
{% if error_message %}
<p><strong>{{ error_message }}</strong></p>
{% endif %}
<form action="{% url 'polls:vote' question.id %}" method="post">
{% csrf_token %}
{% for choice in question.choice_set.all %}
<input type="radio" name="choice" id="choice{{ forloop.counter }}" value="{{ choice.id }}"/>
<label for="choice{{ forloop.counter }}">{{ choice.choice_text }}</label><br/>
{% endfor %}
<input type="submit" value="提交"/>
</form>
</body>
</html>results.html:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>{{ question.question_text }}</h1>
<ul>
{% for choice in question.choice_set.all %}
<li>
{{ choice.choice_text }} --> {{ choice.votes }} vote{{ choice.votes|pluralize }}
</li>
{% endfor %}
</ul>
<a href="{% url 'polls:detail' question.id %}">再次投票</a>
<a href="{% url 'polls:index' %}">返回首页</a>
</body>
</html>十三、至此我们所有配置都已经配置完毕了，马上运行server，进行访问吧
http://127.0.0.1:8000/polls/
十四、githup源码地址: https://github.com/daibaiyang119/VotingSystem
免责声明：
① 本站未注明“稿件来源”的信息均来自网络整理。其文字、图片和音视频稿件的所属权归原作者所有。本站收集整理出于非商业性的教育和科研之目的，并不意味着本站赞同其观点或证实其内容的真实性。仅作为临时的测试数据，供内部测试之用。本站并未授权任何人以任何方式主动获取本站任何信息。
② 本站未注明“稿件来源”的临时测试数据将在测试完成后最终做删除处理。有问题或投稿请发送至: 邮箱/279061341@qq.com QQ/279061341
