Django 1.5.4 专题十 database relationships
一.修改article/models.py的内容如下
from django.db import models
# Create your models here.
class Article(models.Model):
title =models.CharField(max_length=200)
body =models.TextField()
pub_date =models.DateTimeField('date published')
likes =models.IntegerField()
def __unicode__(self):
return self.title
class Comment(models.Model):
name =models.CharField(max_length=200)
body =models.TextField()
pub_date = models.DateTimeField('date published')
article = models.ForeignKey(Article)
二.修改article/forms.py的内容如下
from django import forms
from models import Article,Comment
class ArticleForm(forms.ModelForm):
class Meta:
model=Article
fields=('title','body','pub_date')
class CommentForm(forms.ModelForm):
class Meta:
model=Comment
fields=('name','body')
三.修改article/urls.py的内容如下
from django.conf.urls import patterns,include,url
urlpatterns = patterns('',
url(r'^all/$','article.views.articles'),
url(r'^get/(?P<article_id>\d+)/$','article.views.article'),
url(r'^language/(?P<language>[a-z\-]+)/$','article.views.language'),
url(r'^create/$','article.views.create'),
url(r'^like/(?P<article_id>\d+)/$','article.views.like_article'),
url(r'^add_comment/(?P<article_id>\d+)/$','article.views.add_comment'),
)
四.修改article/views.py的内容如下
from django.http import HttpResponse
from django.shortcuts import render_to_response
from article.models import Article,Comment
from forms import ArticleForm,CommentForm
from django.http import HttpResponseRedirect
from django.core.context_processors import csrf
from django.utils import timezone
def hello(request):
name ="Mike"
html =" <html> <body> Hi %s,this seems to have worked! </body> </html> " % name
return HttpResponse(html)
def hello_template_simple(request):
name ="Mike"
return render_to_response('hello.html',{'name':name})
def articles(request):
language ='en-gb'
session_language ='en-gb'
if 'lang' in request.COOKIES:
language = request.COOKIES['lang']
if 'lang' in request.session:
session_language =request.session['lang']
return render_to_response('articles.html',
{'articles':Article.objects.all(),'language':language,'session_language':session_language})
def article(request,article_id=1):
return render_to_response('article.html',
{'article':Article.objects.get(id=article_id)})
def language(request,language='en-gb'):
response =HttpResponse("setting language to %s" % language)
response.set_cookie('lang',language)
request.session['lang']=language
return response
def create(request):
if request.POST:
form=ArticleForm(request.POST)
if form.is_valid():
form.save()
return HttpResponseRedirect('/articles/all')
else:
form=ArticleForm()
args={}
args.update(csrf(request))
args['form']=form
return render_to_response('create_article.html',args)
def like_article(request,article_id):
if article_id:
a=Article.objects.get(id=article_id)
count=a.likes
count+=1
a.likes=count
a.save()
return HttpResponseRedirect('/articles/get/%s' % article_id)
def add_comment(request,article_id):
a=Article.objects.get(id=article_id)
if request.method == "POST":
f=CommentForm(request.POST)
if f.is_valid():
c=f.save(commit=False)
c.pub_date=timezone.now()
c.article=a
c.save()
return HttpResponseRedirect('/articles/get/%s' % article_id)
else:
f=CommentForm()
args={}
args.update(csrf(request))
args['article']=a
args['form']=f
return render_to_response('add_comment.html',args)
五.修改aritlce/templates/add_comment.html的内容如下
{% extends "base.html" %}
{% block sidebar %}
<ul>
<li><a href="/articles/get/{{article.id}}">Cancel</a></li>
</ul>
{% endblock %}
{% block content %}
<form action="/articles/add_comment/{{article.id}}/" method="post">{% csrf_token %}
<ul> {{form.as_ul}} </ul>
<input type="submit" name="submit" value="Post Comment">
</form>
{% endblock %}
六.运行python manage.py syncdb,修改article/templates/article.html的内容如下
{% extends "base.html" %}
{% block sidebar %}
<ul>
<li><a href="/articles/all">Articles</a></li>
</ul>
{% endblock %}
{% block content %}
<h1> {{ article.title }} </h1>
<p> {{ article.body }} </p>
<p> <a> {{ article.likes }} people liked this article </a> </p>
<p><a href="/articles/like/{{article.id}}">Like</a></p>
<h2>Comment</h2>
{% for c in article.comment_set.all %}
<p>{{c.name}}:{{c.body}}</p>
{% endfor %}
<p><a href="/articles/add_comment/{{article.id}}">Add Comment</a></p>
{% endblock %}
七.最终运行效果如下