Question

我使用Django 1.9。我创建了一个视图来添加一个新对象并且它可以工作，但是当创建一个视图来编辑对象时，我有两个不同的问题：

当我想要编辑相册时，我点击指向要查看整个相册列表的页面的链接进行编辑，但我收到错误Exception Type: NameError和Exception Value: name 'album' is not defined相关的错误 - ＆gt ; mod_artist form = AlbumForm(instance=album)
相反，当我想要编辑艺术家时，我会像以前一样查看能够编辑的整个艺术家列表，但我收到错误Exception Type: UnboundLocalError和Exception Value: local variable 'artist' referenced before assignment涉及 - ＆gt; mod_artist form = ArtistForm(instance=artist)

我的views.py文件是

from django.shortcuts import render, redirect, get_object_or_404
from .forms import *
from .models import *

def mod_album(request):
if request.method == "POST":
    form = AlbumForm(request.POST, instance=album)
    if form.is_valid():
        post = form.save(commit=False)
        post.author = request.user
        post.save()
        return redirect('http://127.0.0.1:8000/')
else:
    form = AlbumForm(instance=album)
return render(request,'polls/mod_album.html',{'form':form})

def mod_artist(request):
if request.method == 'POST':
    form = ArtistForm(request.POST, instance=artist)
    if form.is_valid():
        artist = form.save(commit=False)
        artist.author = request.user
        artist.save()
        return redirect('http://127.0.0.1:8000/')
else:
    form = ArtistForm(instance=artist)
return render(request,'polls/mod_artist.html',{'form':form})

我的index.html文件是

...
<body>
    <div class="container-fluid">

        <div class="header">
            <div>
                <h1>personal library</h1>
            </div>
            <div id="wrap-nav">
                <nav class="navbar navbar-inverse">
                    <div class="container-fluid">
                        <div class="collapse navbar-collapse" id="myNavbar">
                            <ul class="nav navbar-nav">
                                <li class="active"><a href="new_album" class="navbar-link">+ add album</a></li>
                                <li class="active"><a href="mod_album" class="navbar-link">- edit album</a></li>
                                <li class="active"><a href="new_artist" class="navbar-link">+ add artist</a></li>
                                <li class="active"><a href="mod_artist" class="navbar-link">- edit artist</a></li>
                                <li class="active"><a href="result" class="navbar-link">view the list of albums</a></li>
                            </ul>
                        </div>
                    </div>
                </nav>
            </div>

        </div>

        <div class="row">
            <div class="col-xs-12 col-sm-6 col-md-6">
                {% for album in albums %}
                <ul>
                    <li>Album name: {{album.name}}</li>
                    <li>Artist: {{album.artist}}</li>
                    <li>Genre: {{album.genre}}</li>
                    <li>Songs: , </li>
                    <li>Vote: {{album.vote}}</li>
                </ul>
                <hr />
                {% endfor %}
            </div>

            <div class="col-xs-6 col-md-6">
                {% for artist in artists %}
                <ul>
                    <li>Artist name: {{artist.name}}</li>
                </ul>
                <hr />
                {% endfor %}
            </div>
        </div>
    </div>
</body>
...

我的urls.py文件是

from django.conf.urls import url
from . import views

urlpatterns=[
     ...
     url(r'^new_album/$', views.new_album, name='new_album'),
     url(r'^mod_album/$', views.mod_album, name='mod_album'),
     url(r'^new_artist/$', views.new_artist, name='new_artist'),
     url(r'^mod_artist/$', views.mod_artist, name='mod_artist'),
]

和我的forms.py文件是

from django import forms
from .models  import *

class AlbumForm(forms.ModelForm):
    class Meta:
        model = Album
        fields = ['name','artist','year','genre','vote']

class ArtistForm(forms.ModelForm):
    class Meta:
        model = Artist
        fields = ['name']

感谢我们的时间。

编辑表单/视图的问题

0 个答案: