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我有一个正在运行的Django站点和正在运行的管理员，但当我尝试使用管理站点从模型“Article”创建新对象时除外。当我尝试创建一个新的“文章”我得到这个错误：Django Admin：TypeError：__str__返回的非字符串（类型FieldFile）
TypeError at /admin/blog/article/add/
__str__ returned non-string (type FieldFile)
Exception Type: TypeError
Exception Value: __str__ returned non-string (type FieldFile)
Exception Location: /home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/utils/encoding.py in force_text, line 90
下面是奇怪的事情：这是今天上午的工作。我尝试安装django-markdown，并开始出现此错误。我无法让它工作，所以我卸载了django-markdown并将所有代码恢复为原来的（以前的功能），并进行了适当的迁移。
但我仍然收到错误。
这里的追溯和渲染错误：
Error during template rendering
In template /home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/contrib/admin/templates/admin/includes/fieldset.html, error at line 19
__str__ returned non-string (type FieldFile)
9 {% for field in line %}
10 <div{% if not line.fields|length_is:'1' %} class="field-box{% if field.field.name %} field-{{ field.field.name }}{% endif %}{% if not field.is_readonly and field.errors %} errors{% endif %}{% if field.field.is_hidden %} hidden{% endif %}"{% elif field.is_checkbox %} class="checkbox-row"{% endif %}>
11 {% if not line.fields|length_is:'1' and not field.is_readonly %}{{ field.errors }}{% endif %}
12 {% if field.is_checkbox %}
13 {{ field.field }}{{ field.label_tag }}
14 {% else %}
15 {{ field.label_tag }}
16 {% if field.is_readonly %}
17 <p>{{ field.contents }}</p>
18 {% else %}
19
{{ field.field }}
20 {% endif %}
21 {% endif %}
22 {% if field.field.help_text %}
23 <p class="help">{{ field.field.help_text|safe }}</p>
24 {% endif %}
25 </div>
26 {% endfor %}
27 </div>
28 {% endfor %}
29 </fieldset>
Traceback Switch to copy-and-paste view
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/core/handlers/base.py in get_response
response = response.render()
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/response.py in render
self.content = self.rendered_content
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/response.py in rendered_content
content = template.render(context, self._request)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/backends/django.py in render
return self.template.render(context)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/base.py in render
return self._render(context)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/base.py in _render
return self.nodelist.render(context)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/base.py in render
bit = self.render_node(node, context)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/debug.py in render_node
return node.render(context)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/loader_tags.py in render
return compiled_parent._render(context)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/base.py in _render
return self.nodelist.render(context)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/base.py in render
bit = self.render_node(node, context)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/debug.py in render_node
return node.render(context)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/loader_tags.py in render
return compiled_parent._render(context)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/base.py in _render
return self.nodelist.render(context)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/base.py in render
bit = self.render_node(node, context)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/debug.py in render_node
return node.render(context)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/loader_tags.py in render
result = block.nodelist.render(context)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/base.py in render
bit = self.render_node(node, context)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/debug.py in render_node
return node.render(context)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/loader_tags.py in render
result = block.nodelist.render(context)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/base.py in render
bit = self.render_node(node, context)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/debug.py in render_node
return node.render(context)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/defaulttags.py in render
nodelist.append(node.render(context))
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/loader_tags.py in render
return template.render(context)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/base.py in render
return self._render(context)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/base.py in _render
return self.nodelist.render(context)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/base.py in render
bit = self.render_node(node, context)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/debug.py in render_node
return node.render(context)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/defaulttags.py in render
nodelist.append(node.render(context))
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/defaulttags.py in render
nodelist.append(node.render(context))
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/defaulttags.py in render
return nodelist.render(context)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/base.py in render
bit = self.render_node(node, context)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/debug.py in render_node
return node.render(context)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/defaulttags.py in render
return nodelist.render(context)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/base.py in render
bit = self.render_node(node, context)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/debug.py in render_node
return node.render(context)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/template/debug.py in render
output = force_text(output)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/utils/encoding.py in force_text
s = six.text_type(s)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/utils/html.py in <lambda>
klass.__str__ = lambda self: mark_safe(klass_str(self))
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/forms/forms.py in __str__
return self.as_widget()
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/forms/forms.py in as_widget
return force_text(widget.render(name, self.value(), attrs=attrs))
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/contrib/admin/widgets.py in render
'widget': self.widget.render(name, value, *args, **kwargs),
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/forms/widgets.py in render
options = self.render_options(choices, value)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/forms/widgets.py in render_options
for option_value, option_label in chain(self.choices, choices):
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/forms/models.py in __iter__
yield self.choice(obj)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/forms/models.py in choice
return (self.field.prepare_value(obj), self.field.label_from_instance(obj))
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/forms/models.py in label_from_instance
return smart_text(obj)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/utils/encoding.py in smart_text
return force_text(s, encoding, strings_only, errors)
...
▶ Local vars
/home/USERNAME/webapps/APPNAME/lib/python3.4/Django-1.8.2-py3.4.egg/django/utils/encoding.py in force_text
s = six.text_type(s)
...
▶ Local vars
这里是我的第二条型号：
class Article(models.Model):
author = models.ForeignKey(Author, blank=True, null=True)
title = models.CharField(max_length=200)
slug = models.SlugField(max_length=200, blank=True, null=True)
article_category = models.OneToOneField(ArticleCategory, blank=True, null=True)
body_en = models.TextField(blank=True, null=True)
body_fr = models.TextField(blank=True, null=True)
is_review = models.BooleanField(default=False)
publish = models.BooleanField(default=True)
date_created = models.DateTimeField(blank=True, null=True)
modified = models.DateTimeField(auto_now=True)
tags = models.ManyToManyField(Tag, blank=True, null=True)
work_link = models.ForeignKey(Work, null=True, blank=True)
artist_link = models.ForeignKey(Artist, null=True, blank=True)
images = models.ManyToManyField(ArticleImage)
def __str__(self):
return self.title
class Meta:
ordering = ["-date_created"]
admin.py：
from django.contrib import admin
from blog.models import Article, Tag, Author, ArticleCategory, ArticleImage
# Register your models here.
admin.site.register(Article)
admin.site.register(Author)
admin.site.register(Tag)
admin.site.register(ArticleCategory)
admin.site.register(ArticleImage)
我几乎觉得自己卸载，然后就重新 - 用当前的设置开始整个事情，但我更愿意找出我搞砸了什么，然后解决它。
任何帮助，非常感谢。
马特
但错误说“FieldFile”，而不是“FileField”。它们是一样的吗？ –
“当您访问模型上的FileField时，将为您提供一个FieldFile实例作为访问基础文件的代理” – miyamoto
“修复此问题。它发生在我遇到由于Django降价安装而引起的错误时，我将其归因于此。我将字符串方法更改为图像标题，现在它工作正常。 –