我试图将添加和编辑表单合并为一个并收到错误'site_image'属性没有与之关联的文件。
我可以编辑文件，但无法添加文件，但现在当我加载网站文件页面时，我收到了以下错误，我没有更改模型，因此我不确定为什么我会收到此错误。
如果将site_image设置为空白并且为空，那么文件列表应该不关心吗？
我的文件模型：
class SiteFiles(models.Model):
site_data = models.ForeignKey(SiteData, verbose_name="Site", on_delete=models.PROTECT)
site_image = models.ImageField(upload_to='site_files/', blank=True, null=True)
site_image_thumbnail = ImageSpecField(source='site_image',
processors=[ResizeToFill(200, 150)],
format='JPEG',
options={'quality': 60})
site_file = models.FileField(blank=True, upload_to=site_files_path, \
validators=[validate_file_extension])
file_name = models.CharField(max_length=200, verbose_name="File Name")
file_type = models.CharField(max_length=100, verbose_name='File Type', \
choices=settings.FILE_TYPE)
class Meta:
verbose_name = "Site Files"
verbose_name_plural = "Site Files"
def __str__(self):
return '%s | %s | %s ' % (self.site_data.location, self.site_data.location, self.file_name)
my forms.py
class FileForm(forms.ModelForm):
class Meta:
model = SiteFiles
fields = ['site_image', 'site_file', 'file_name','file_type']
def __init__(self, *args, **kwargs):
super(FileForm, self).__init__(*args, **kwargs)
self.helper = FormHelper(self)
self.helper.form_id = 'file_form'
self.helper.form_method = 'POST'
self.helper.add_input(Submit('submit', 'Save', css_class='btn-primary'))
self.helper.layout = Layout(
Div(
Div(
Div(
Div(HTML('<i class="fa fa-camera-retro fa-fw"></i> Add File or Photo'), css_class='panel-heading'),
Div(
Field('site_image', placeholder='Image'),
Field('site_file', placeholder='File'),
Field('file_name', placeholder='Display Name'),
Div('file_type', title="File Type"),
css_class='panel-body'
),
css_class='panel panel-default',
),
css_class='col-lg-3'
),
css_class='row'
),
)
my views.py
@login_required
@user_passes_test(lambda u: u.has_perm('sites.add_sitefile'))
def add_edit_file(request, site_id, item_id=None):
from sites.forms import FileForm
from sites.models import SiteFiles
site_data = get_object_or_404(SiteData, pk=site_id)
# set edit values
if item_id:
item_data = get_object_or_404(SiteFiles, pk=item_id)
form_type = 'Edit'
form = FileForm(instance=item_data)
else:
# set add values
form = FileForm()
form_type = 'Add'
item_data = SiteFiles()
# set posting
if request.method == 'POST':
form = FileForm(request.POST,instance=item_data)
if form.is_valid():
form.instance.site_data = site_data
form.save()
return redirect('sites:site_detail_files', site_id)
return render(request, 'sites/add_edit_file.html', {
'add_edit_file_form': form,
'SiteName' : site_data.location,
'SiteID' : site_id,
'ItemID' : item_id,
'FormType' : form_type
})
错误：
Traceback:
File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in _resolve_lookup
882. current = current[bit]
During handling of the above exception ('ImageFieldFile' object is not subscriptable), another exception occurred:
File "/usr/local/lib/python3.6/site-packages/django/core/handlers/exception.py" in inner
41. response = get_response(request)
File "/usr/local/lib/python3.6/site-packages/django/core/handlers/base.py" in _legacy_get_response
249. response = self._get_response(request)
File "/usr/local/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
187. response = self.process_exception_by_middleware(e, request)
File "/usr/local/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
185. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/usr/local/lib/python3.6/site-packages/django/contrib/auth/decorators.py" in _wrapped_view
23. return view_func(request, *args, **kwargs)
File "/itapp/itapp/sites/views.py" in site_detail_files
311. 'active_files' : 'class="active"',
File "/usr/local/lib/python3.6/site-packages/django/shortcuts.py" in render
30. content = loader.render_to_string(template_name, context, request, using=using)
File "/usr/local/lib/python3.6/site-packages/django/template/loader.py" in render_to_string
68. return template.render(context, request)
File "/usr/local/lib/python3.6/site-packages/django/template/backends/django.py" in render
66. return self.template.render(context)
File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
207. return self._render(context)
File "/usr/local/lib/python3.6/site-packages/django/test/utils.py" in instrumented_test_render
107. return self.nodelist.render(context)
File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
990. bit = node.render_annotated(context)
File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render_annotated
957. return self.render(context)
File "/usr/local/lib/python3.6/site-packages/django/template/loader_tags.py" in render
177. return compiled_parent._render(context)
File "/usr/local/lib/python3.6/site-packages/django/test/utils.py" in instrumented_test_render
107. return self.nodelist.render(context)
File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
990. bit = node.render_annotated(context)
File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render_annotated
957. return self.render(context)
File "/usr/local/lib/python3.6/site-packages/django/template/loader_tags.py" in render
177. return compiled_parent._render(context)
File "/usr/local/lib/python3.6/site-packages/django/test/utils.py" in instrumented_test_render
107. return self.nodelist.render(context)
File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
990. bit = node.render_annotated(context)
File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render_annotated
957. return self.render(context)
File "/usr/local/lib/python3.6/site-packages/django/template/loader_tags.py" in render
72. result = block.nodelist.render(context)
File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
990. bit = node.render_annotated(context)
File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render_annotated
957. return self.render(context)
File "/usr/local/lib/python3.6/site-packages/django/template/defaulttags.py" in render
216. nodelist.append(node.render_annotated(context))
File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render_annotated
957. return self.render(context)
File "/usr/local/lib/python3.6/site-packages/django/template/library.py" in render
202. resolved_args, resolved_kwargs = self.get_resolved_arguments(context)
File "/usr/local/lib/python3.6/site-packages/django/template/library.py" in get_resolved_arguments
188. resolved_args = [var.resolve(context) for var in self.args]
File "/usr/local/lib/python3.6/site-packages/django/template/library.py" in <listcomp>
188. resolved_args = [var.resolve(context) for var in self.args]
File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in resolve
708. obj = self.var.resolve(context)
File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in resolve
849. value = self._resolve_lookup(context)
File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in _resolve_lookup
890. current = getattr(current, bit)
File "/usr/local/lib/python3.6/site-packages/django/db/models/fields/files.py" in url
69. self._require_file()
File "/usr/local/lib/python3.6/site-packages/django/db/models/fields/files.py" in _require_file
46. raise ValueError("The '%s' attribute has no file associated with it." % self.field.name)
Exception Type: ValueError at /sites/site/files/7
Exception Value: The 'site_image' attribute has no file associated with it.
编辑：
site_details_files：
@login_required
def site_detail_files(request, site_id):
files = SiteFiles.objects.filter(site_data__id=site_id)
try:
site = files[0].site_data
except:
site = get_object_or_404(SiteData, pk=site_id)
return render(request, 'sites/site_detail_files.html', {
'Files': files,
'SiteName' : site.location,
'SiteID' : site.id,
'PageType' : 'files',
'active_files' : 'class="active"',
})
模板：
{% block content %}
<div class="col-lg-9">
<div class="panel panel-default">
<div class="panel-heading">
<i class="fa fa-camera fa-fw"></i> Photos
</div>
<div class="panel-body">
{% get_file_type Files 'Cabinet Photo' as photos %}
{% for file in photos %}
<div class="img-item">
<div class="img">
<a class="image-float-left" id="" href="{% signed_url file.site_image.url %}" target="_blank">
<img src="{% signed_url file.site_image_thumbnail.url %}" alt="" />
</a>
</div>
<div class="img-text">
{{ file.file_name }}
<div class="img-edit" >
<a href="{% url 'sites:edit_file' SiteID file.id %}" class="edit-icon">
<i class="fa fa-edit"></i>
</a>
</div>
</div>
</div>
<!-- /.img-item-->
{% endfor %}
</div>
<!-- /.panel-body-->
</div>
<!-- /.panel-->
</div>
<!-- /.col-lg-9 -->
<div class="col-lg-3">
<div class="panel panel-default">
<div class="panel-heading">
<i class="fa fa-file-text-o fa-fw"></i> Files
</div>
<div class="panel-body">
{% exclude_file_type Files 'Cabinet Photo' as site_files %}
{% for file in site_files %}
<ul>
{% if file.file_type != "Cabinet Photo" %}
{% if file.site_file %}
<li>
<a href="{% url 'sites:edit_file' SiteID file.id %}" class="edit-icon">
<i class="fa fa-edit fa-1x"></i>
</a>
<a href="{% signed_url file.site_file.url %}" target="_blank">{{ file.file_name }}</a>
</li>
{% endif %}
{% if file.site_image %}
<li>
<a href="{{% url 'sites:edit_file' SiteID file.id %}" class="edit-icon">
<i class="fa fa-edit"></i>
</a>
<a href="{% signed_url file.site_image.url %}" target="_blank">{{ file.file_name }}</a>
</li>
{% endif %}
{% endif %}
</ul>
{% endfor %}
</div>
<!-- /.panel-body-->
</div>
<!-- /.panel-->
</div>
<!-- /.col-lg-9 -->
{% endblock %}
答案 0 :(得分：1)
上传文件时，您需要将request.FILES传递给表单。
form = FileForm(request.POST, request.FILES, instance=item_data)
确保您也在模板中设置enctype="multipart/form-data"。
有关详细信息，请参阅file uploads上的文档。
但是，这些更改不会解决您的错误，因为它来自不同的视图site_detail_files。您似乎在模板中使用file.site_image.url而未先检查file.site_image。你应该添加一个额外的if块：
{% for file in photos %}
...
{% if file.site_image %}
...
<a class="image-float-left" id="" href="{% signed_url file.site_image.url %}" target="_blank">
...
{% endif %}
{% endfor %}