Django Adminを使用して画像をアップロードしているときのTemplateSyntaxError

Question

"Uploading images using Django Admin?"の例を試しましたが、残念ながら常に失敗しています。

モデルは次のとおりです。

from django.db import models 
from django.contrib import admin 

class Celebrity(models.Model): 
    name = models.CharField(max_length=200) 

    def __unicode__(self): 
     return self.name 


class Image(models.Model): 
    celebrity = models.ForeignKey(Celebrity) 
    image = models.ImageField('Bild', upload_to="files/") 

    def __unicode__(self): 
     return self.image 

class InlineImage(admin.TabularInline): 
    model = Image 

class CelebrityAdmin(admin.ModelAdmin): 
    inlines = [InlineImage] 

admin.site.register(Celebrity, CelebrityAdmin) 

MEDIA_ROOTは次のとおりです。

MEDIA_ROOT = 'c:/python/django/apps/af/neu/images/media/' 

これはURLです：

url(r'^media/(?P<path>.*)$', 'django.views.static.serve', 
{ 'document_root': 'c:/python/django/apps/af/neu/images/media/files' }), 

# Uncomment the next line to enable the admin: 
url(r'^admin/', include(admin.site.urls)), 

この構成アップロード作品でが、私はその後、私は、次のトレースバックを得る編集しようとしています：

Environment: 


Request Method: GET 
Request URL: http://localhost:8000/admin/image/celebrity/3/ 

Django Version: 1.3 
Python Version: 2.6.6 
Installed Applications: 
['django.contrib.auth', 
'django.contrib.contenttypes', 
'django.contrib.sessions', 
'django.contrib.sites', 
'django.contrib.messages', 
'django.contrib.staticfiles', 
'django.contrib.admin', 
'debug_toolbar', 
'images.image'] 
Installed Middleware: 
('debug_toolbar.middleware.DebugToolbarMiddleware', 
'django.middleware.common.CommonMiddleware', 
'django.contrib.sessions.middleware.SessionMiddleware', 
'django.middleware.csrf.CsrfViewMiddleware', 
'django.contrib.auth.middleware.AuthenticationMiddleware', 
'django.contrib.messages.middleware.MessageMiddleware') 


Template error: 
In template c:\python\lib\site-packages\django\contrib\admin\templates\admin\edit_inline\tabular.html, error at line 27 
    Caught TypeError while rendering: coercing to Unicode: need string or buffer, ImageFieldFile found 
    17 : 


    18 :  <tbody> 


    19 :  {% for inline_admin_form in inline_admin_formset %} 


    20 :   {% if inline_admin_form.form.non_field_errors %} 


    21 :   <tr><td colspan="{{ inline_admin_form|cell_count }}">{{ inline_admin_form.form.non_field_errors }}</td></tr> 


    22 :   {% endif %} 


    23 :   <tr class="{% cycle "row1" "row2" %} {% if inline_admin_form.original or inline_admin_form.show_url %}has_original{% endif %}{% if forloop.last %} empty-form{% endif %}" 


    24 :    id="{{ inline_admin_formset.formset.prefix }}-{% if not forloop.last %}{{ forloop.counter0 }}{% else %}empty{% endif %}"> 


    25 :   <td class="original"> 


    26 :   {% if inline_admin_form.original or inline_admin_form.show_url %}<p> 


    27 :   {% if inline_admin_form.original %} {{ inline_admin_form.original }} {% endif %} 


    28 :   {% if inline_admin_form.show_url %}<a href="../../../r/{{ inline_admin_form.original_content_type_id }}/{{ inline_admin_form.original.id }}/">{% trans "View on site" %}</a>{% endif %} 


    29 :    </p>{% endif %} 


    30 :   {% if inline_admin_form.has_auto_field %}{{ inline_admin_form.pk_field.field }}{% endif %} 


    31 :   {{ inline_admin_form.fk_field.field }} 


    32 :   {% spaceless %} 


    33 :   {% for fieldset in inline_admin_form %} 


    34 :    {% for line in fieldset %} 


    35 :    {% for field in line %} 


    36 :     {% if field.is_hidden %} {{ field.field }} {% endif %} 


    37 :    {% endfor %} 


Traceback: 
File "C:\Python\lib\site-packages\django\core\handlers\base.py" in get_response 
    111.       response = callback(request, *callback_args, **callback_kwargs) 
File "C:\Python\lib\site-packages\django\contrib\admin\options.py" in wrapper 
    307.     return self.admin_site.admin_view(view)(*args, **kwargs) 
File "C:\Python\lib\site-packages\django\utils\decorators.py" in _wrapped_view 
    93.      response = view_func(request, *args, **kwargs) 
File "C:\Python\lib\site-packages\django\views\decorators\cache.py" in _wrapped_view_func 
    79.   response = view_func(request, *args, **kwargs) 
File "C:\Python\lib\site-packages\django\contrib\admin\sites.py" in inner 
    197.    return view(request, *args, **kwargs) 
File "C:\Python\lib\site-packages\django\utils\decorators.py" in _wrapper 
    28.    return bound_func(*args, **kwargs) 
File "C:\Python\lib\site-packages\django\utils\decorators.py" in _wrapped_view 
    93.      response = view_func(request, *args, **kwargs) 
File "C:\Python\lib\site-packages\django\utils\decorators.py" in bound_func 
    24.     return func(self, *args2, **kwargs2) 
File "C:\Python\lib\site-packages\django\db\transaction.py" in inner 
    217.     res = func(*args, **kwargs) 
File "C:\Python\lib\site-packages\django\contrib\admin\options.py" in change_view 
    1030.   return self.render_change_form(request, context, change=True, obj=obj) 
File "C:\Python\lib\site-packages\django\contrib\admin\options.py" in render_change_form 
    708.   ], context, context_instance=context_instance) 
File "C:\Python\lib\site-packages\django\shortcuts\__init__.py" in render_to_response 
    20.  return HttpResponse(loader.render_to_string(*args, **kwargs), **httpresponse_kwargs) 
File "C:\Python\lib\site-packages\django\template\loader.py" in render_to_string 
    188.   return t.render(context_instance) 
File "C:\Python\lib\site-packages\django\template\base.py" in render 
    123.    return self._render(context) 
File "C:\Python\lib\site-packages\django\test\utils.py" in instrumented_test_render 
    57.  return self.nodelist.render(context) 
File "C:\Python\lib\site-packages\django\template\base.py" in render 
    744.     bits.append(self.render_node(node, context)) 
File "C:\Python\lib\site-packages\django\template\debug.py" in render_node 
    73.    result = node.render(context) 
File "C:\Python\lib\site-packages\django\template\loader_tags.py" in render 
    127.   return compiled_parent._render(context) 
File "C:\Python\lib\site-packages\django\test\utils.py" in instrumented_test_render 
    57.  return self.nodelist.render(context) 
File "C:\Python\lib\site-packages\django\template\base.py" in render 
    744.     bits.append(self.render_node(node, context)) 
File "C:\Python\lib\site-packages\django\template\debug.py" in render_node 
    73.    result = node.render(context) 
File "C:\Python\lib\site-packages\django\template\loader_tags.py" in render 
    127.   return compiled_parent._render(context) 
File "C:\Python\lib\site-packages\django\test\utils.py" in instrumented_test_render 
    57.  return self.nodelist.render(context) 
File "C:\Python\lib\site-packages\django\template\base.py" in render 
    744.     bits.append(self.render_node(node, context)) 
File "C:\Python\lib\site-packages\django\template\debug.py" in render_node 
    73.    result = node.render(context) 
File "C:\Python\lib\site-packages\django\template\loader_tags.py" in render 
    64.    result = block.nodelist.render(context) 
File "C:\Python\lib\site-packages\django\template\base.py" in render 
    744.     bits.append(self.render_node(node, context)) 
File "C:\Python\lib\site-packages\django\template\debug.py" in render_node 
    73.    result = node.render(context) 
File "C:\Python\lib\site-packages\django\template\defaulttags.py" in render 
    227.     nodelist.append(node.render(context)) 
File "C:\Python\lib\site-packages\django\template\loader_tags.py" in render 
    170.    return self.render_template(template, context) 
File "C:\Python\lib\site-packages\django\template\loader_tags.py" in render_template 
    141.   output = template.render(context) 
File "C:\Python\lib\site-packages\django\template\base.py" in render 
    123.    return self._render(context) 
File "C:\Python\lib\site-packages\django\test\utils.py" in instrumented_test_render 
    57.  return self.nodelist.render(context) 
File "C:\Python\lib\site-packages\django\template\base.py" in render 
    744.     bits.append(self.render_node(node, context)) 
File "C:\Python\lib\site-packages\django\template\debug.py" in render_node 
    73.    result = node.render(context) 
File "C:\Python\lib\site-packages\django\template\defaulttags.py" in render 
    227.     nodelist.append(node.render(context)) 
File "C:\Python\lib\site-packages\django\template\defaulttags.py" in render 
    311.    return self.nodelist_true.render(context) 
File "C:\Python\lib\site-packages\django\template\base.py" in render 
    744.     bits.append(self.render_node(node, context)) 
File "C:\Python\lib\site-packages\django\template\debug.py" in render_node 
    73.    result = node.render(context) 
File "C:\Python\lib\site-packages\django\template\defaulttags.py" in render 
    311.    return self.nodelist_true.render(context) 
File "C:\Python\lib\site-packages\django\template\base.py" in render 
    744.     bits.append(self.render_node(node, context)) 
File "C:\Python\lib\site-packages\django\template\debug.py" in render_node 
    73.    result = node.render(context) 
File "C:\Python\lib\site-packages\django\template\debug.py" in render 
    92.    output = force_unicode(output) 
File "C:\Python\lib\site-packages\django\utils\encoding.py" in force_unicode 
    71.     s = unicode(s) 

Exception Type: TemplateSyntaxError at /admin/image/celebrity/3/ 
Exception Value: Caught TypeError while rendering: coercing to Unicode: need string or buffer, ImageFieldFile found 

私も同じようMEDIA_ROOTを試してみました：

MEDIA_ROOT = os.path.join(os.path.dirname(file), "media").replace(r"\\", "//"), 

または

MEDIA_ROOT = os.path.join(os.path.dirname(file), "media").replace("\\", "//"), 

をアップロードしてもアップロードできません。

だから私は本当に無知です。どんな助けも高く評価されています。

Answer 1

はちょうどこのエラーの理由を引用しています

class Image(models.Model): 
    celebrity = models.ForeignKey(Celebrity) 
    image = models.ImageField('Bild', upload_to="files/") 

    def __unicode__(self): 
     return self.image.name 

あなたもreference.Iためthis議論を参照Imageクラスのごユニコード機能を変更します

def __unicode__(self): 
    return self.file.name 

to achieve the same result.

Answer 2

トレースバックは何が起こっているかを正確に伝えます。エラーは、Imageクラスの__unicode__メソッドにあります。imageプロパティを返していますが、これは文字列ではないため、ユニコードとして出力することはできません。

代わりにimage.urlを返送してください。

The problem with this issue finally had nothing to do with the forms themselves, but the unicode method of the Image-model. Older implementations of ImageField had a unicode method of their own so

def __unicode__(self): 
    return self.file 

worked fine. Now this needs to be

：