我有一个中间模型的模型formset，我用它来将用户分配给另一个模型。当我尝试生成视图时，我得到'StaffAssignmentForm' object has no attribute 'forms'。
模型
class StaffAssignment(models.Model):
study = models.ForeignKey(Study, related_name='study_set', null=True, on_delete=models.CASCADE)
staff = models.ForeignKey(User, related_name='assigned_to_set', null=True, on_delete=models.CASCADE)
role = models.CharField(max_length=100, null=True)
assigned_on = models.DateTimeField(auto_now_add=True)
class Meta:
ordering = ('-role',)
def __str__(self):
return '{} is assigned to {}'.format(self.staff, self.study)
表格
class AddStaff(forms.ModelForm):
model = StaffAssignment
fields = ('staff',)
def __init__(self, *args, **kwargs):
super(AddStaff, self).__init__(*args, **kwargs)
for form in self.forms:
for field in form.fields:
form.fields[field].widget.attrs.update({'class': 'form-control'})
视图
def add_staff(request, study_slug):
study = get_object_or_404(Study, slug=study_slug)
staff_formset = modelformset_factory(StaffAssignment, form=AddStaff, fields=('staff',), extra=5)
if request.method == 'POST':
staffList = staff_formset(request.POST, request.FILES)
if staffList.is_valid():
for assignment in staffList:
assigned = assignment.save(commit=False)
assigned.study = study
assigned.save()
return HttpResponseRedirect(reverse('studies:studydashboard'))
else:
pass
else:
staffList = staff_formset(queryset=StaffAssignment.objects.none())
return render(request, 'studies/addstaff.html', {'staffList': staffList, 'study': study})
追溯
Environment:
Request Method: GET
Request URL: http://127.0.0.1:8000/studies/add-staff/lilly-a4/
Django Version: 1.8.7
Python Version: 3.5.0
Installed Applications:
('django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'studies',
'account')
Installed Middleware:
('django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
'django.middleware.security.SecurityMiddleware')
Template error:
In template /Users/RickyD/PycharmProjects/StudyTrack/studies/templates/studies/addstaff.html, error at line 20
'StaffAssignmentForm' object has no attribute 'forms'
10 : {% block content %}
11 : <div class="row">
12 : <div class="col-md-8">
13 : <div class="box box-primary">
14 : <div class="box-header with-border">
15 : <h3 class="box-title">Add new study </h3>
16 : </div>
17 : <form action="{% url 'studies:addstaff' study.slug %}" method="post" enctype="multipart/form-data">
18 : {% csrf_token %}
19 : <div class="box-body">
20 : {{ staffList.as_p }}
21 : </div>
22 : <div class="box-footer">
23 : <button type="submit" class="btn btn-primary">Submit</button>
24 : </div>
25 : </form>
26 : </div>
27 : </div>
28 : </div>
29 :
30 : <div class="col-md-4">
Traceback:
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/core/handlers/base.py" in get_response
132. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/Users/RickyD/PycharmProjects/StudyTrack/studies/views.py" in add_staff
87. return render(request, 'studies/addstaff.html', {'staffList': staffList, 'study': study})
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/shortcuts.py" in render
67. template_name, context, request=request, using=using)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/template/loader.py" in render_to_string
99. return template.render(context, request)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/template/backends/django.py" in render
74. return self.template.render(context)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/template/base.py" in render
210. return self._render(context)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/template/base.py" in _render
202. return self.nodelist.render(context)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/template/base.py" in render
905. bit = self.render_node(node, context)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/template/debug.py" in render_node
79. return node.render(context)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/template/loader_tags.py" in render
135. return compiled_parent._render(context)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/template/base.py" in _render
202. return self.nodelist.render(context)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/template/base.py" in render
905. bit = self.render_node(node, context)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/template/debug.py" in render_node
79. return node.render(context)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/template/loader_tags.py" in render
65. result = block.nodelist.render(context)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/template/base.py" in render
905. bit = self.render_node(node, context)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/template/debug.py" in render_node
79. return node.render(context)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/template/debug.py" in render
89. output = self.filter_expression.resolve(context)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/template/base.py" in resolve
648. obj = self.var.resolve(context)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/template/base.py" in resolve
789. value = self._resolve_lookup(context)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/template/base.py" in _resolve_lookup
849. current = current()
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/forms/formsets.py" in as_p
406. forms = ' '.join(form.as_p() for form in self)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/forms/formsets.py" in __iter__
73. return iter(self.forms)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/utils/functional.py" in __get__
59. res = instance.__dict__[self.name] = self.func(instance)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/forms/formsets.py" in forms
142. forms = [self._construct_form(i) for i in range(self.total_form_count())]
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/forms/formsets.py" in <listcomp>
142. forms = [self._construct_form(i) for i in range(self.total_form_count())]
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/forms/models.py" in _construct_form
596. return super(BaseModelFormSet, self)._construct_form(i, **kwargs)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/forms/formsets.py" in _construct_form
167. form = self.form(**defaults)
File "/Users/RickyD/PycharmProjects/StudyTrack/studies/forms.py" in __init__
69. for form in self.forms:
Exception Type: AttributeError at /studies/add-staff/lilly-a4/
Exception Value: 'StaffAssignmentForm' object has no attribute 'forms'
答案 0 :(得分：1)
您正在表单中迭代表单，但表单没有任何表单属性。
class AddStaff(forms.ModelForm):
model = StaffAssignment
fields = ('staff',)
def __init__(self, *args, **kwargs):
super(AddStaff, self).__init__(*args, **kwargs)
#for form in self.forms:
#for field in form.fields:
for field in self.fields:
self.fields[field].widget.attrs.update({'class': 'form-control'})