Django 1.5.4 专题11 file uploading and updating database schema
一.修改settings.py 的内容如下
二.修改article/models.py的内容如下
from django.db import models
from time import time
def get_upload_file_name(instance,filename):
return "upload_files/%s_%s" % (str(time()).replace('.','_'),filename)
# 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()
thumbnail =models.FileField(upload_to=get_upload_file_name)
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)
三.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','thumbnail')
class CommentForm(forms.ModelForm):
class Meta:
model=Comment
fields=('name','body')
四.修改article/templates/article.html
{% 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>
{% if artilce.thumbnail %}
<p><img src="/static/assets/{{article.thumbnail}}" width="200"></p>
{% endif %}
<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 %}
五.修改article/templates/create_article.html的内容如下
{% extends "base.html" %}
{% block sidebar %}
<ul>
<li><a href="/articles/all">Cancel</a></li>
</ul>
{% endblock %}
{% block content %}
<form action="/articles/create/" method="post" enctype="multipart/form-data">{% csrf_token %}
<ul> {{ form.as_ul}} </ul>
<input type="submit" name="submit" value="Create Article">
</form>
{% endblock %}
六.修改article/views.py的内容如下
def create(request):
if request.POST:
form=ArticleForm(request.POST,request.FILES)
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)
七.转换数据库后端时导入初始数据执行
syncdb 并 不能将模型的修改或删除同步到数据库；如果你修改或删除了一个模型，并想把它提交到数据库，syncdb并不会做出任何处理,所以要导出数据,再导入数据
python manage.py dumpdata article --indent=4 >article.json
python manage.py reset article; 清除数据
八.最终效果如下
