在Django模板中显示两个表单
我的目标是把两个模型放在一个模板里。我尝试了很多方法，但都没有成功。最开始我有两个视图、两个模型和两个表单。后来我发现有人在用inlineformsets，所以我放弃了其中一个视图，设置了inlineformset。
现在我到了这个阶段，但似乎遇到了瓶颈。
模板在浏览器中正常显示，'object_list'部分能按预期显示数据库内容，而'form'部分也能正确渲染表单并验证/保存数据。问题出在'formset'上。没有任何字段被渲染（我本来期待看到一个下拉框，因为这个字段是外键），而当我按下'提交'按钮时，我得到了：
AttributeError at /settings/
'NoneType' object has no attribute 'save'
如果能帮我找到错误或者给我一些其他解决方案的建议，我将非常感激。
代码：
models.py
from django.db import models
class RevisionSettings(models.Model):
global_revision_type = models.CharField(max_length = 5, unique=True, blank = True)
global_revision_description = models.CharField(max_length = 300, unique=True, blank = True)
class Meta:
ordering = ["global_revision_type"]
def __unicode__(self):
return u'%s %s' % (self.global_revision_type, self.global_revision_description)
class RevisionDefaultType(models.Model):
defaultrevisiontype = models.ForeignKey(RevisionSettings)
class Meta:
ordering = ["defaultrevisiontype"]
def __unicode__(self):
return unicode(self.defaultrevisiontype)
views.py
class RevisionSettingsView(CreateView):
template_name = 'settings/revisionsettings_view.html'
model = RevisionSettings
form_class = SettingsForm
success_url = reverse_lazy('globalsettings')
success_message = 'Successfully added your new revision type'
def get(self, request, *args, **kwargs):
self.object = None
form_class = self.get_form_class()
form = self.get_form(form_class)
formset = SettingsFormSet(instance = RevisionSettings)
return self.render_to_response(
self.get_context_data(form=form,
formset=formset))
def post(self, request, *args, **kwargs):
self.object = None
form_class = self.get_form_class()
form = self.get_form(form_class)
formset = SettingsFormSet(self.request.POST)
if 'rev_settings_form_1' in self.request.POST:
if form.is_valid():
return self.form_valid(form)
else:
return self.form_invalid(form)
elif 'rev_settings_form_2' in self.request.POST:
if formset.is_valid():
return self.formset_valid(formset)
else:
return self.form_invalid(formset)
def form_valid(self, form):
self.object = form.save()
self.object.save()
return HttpResponseRedirect(self.get_success_url())
def formset_valid(self, formset):
self.object.save()
formset.instance = self.object
formset.save()
return HttpResponseRedirect(self.get_success_url())
def form_invalid(self, form, formset):
return self.render_to_response(self.get_context_data(form=form,formset=formset))
def get_context_data(self, **kwargs):
kwargs['object_list'] = RevisionSettings.objects.order_by('global_revision_type')
return super(RevisionSettingsView, self).get_context_data(**kwargs)
forms.py
from django import forms
from django.forms.models import inlineformset_factory
from .models import RevisionSettings, RevisionDefaultType
class SettingsForm(forms.ModelForm):
class Meta:
model = RevisionSettings
class DefaultSettingsForm(forms.ModelForm):
class Meta:
model = RevisionDefaultType
SettingsFormSet = inlineformset_factory(RevisionSettings, RevisionDefaultType)
revisionsettings_view.html
(我去掉了大部分HTML样式，以便信息更直接)
{% extends 'base_private.html' %}
{% block content %}
{% for object in object_list %}
<tr>
<td align="center">{{ object.global_revision_type }}</td>
<td align="center">{{ object.global_revision_description }}</td>
<td align="center"><a href="/settings/{{ object.id }}/delete" class="tooltip-test" title="" data-original-title="Delete selected revision type"><span class="glyphicon glyphicon-remove-circle"></span></a></td>
</tr>
{% endfor %}
<form action = '{{ action }}' method = 'POST' class="form-horizontal" role="form">
{% csrf_token %}
<tr>
<td align="center">
{{ formset.management_form }}
{% for form in formset %}
{{ form.id }}
{{ form.defaultrevisiontype.label_tag }}
{{ form.defaultrevisiontype }}
{% endfor %}
</td>
</tr>
<span class="input-group-addon">
<input type = 'submit' name = 'rev_settings_form_2' value = 'Update Default Revision Type' class = 'btn btn-success'>
</span>
<td align="center">{{ form.global_revision_type }}{{ form.global_revision_type.errors }}</td>
<td align="center">{{ form.global_revision_description }}{{ form.global_revision_description.errors }}</td>
</tr>
<span class="input-group-addon">
<input type = 'submit' name = 'rev_settings_form_1' value = 'Add Revision Type' class = 'btn btn-success'>
</span>
</form>
{% endblock %}
2 个回答
0
谢谢大家的帮助。你们的建议真的让我找到了这个解决办法。主要的改变是下面这个 'def get'。我去掉了原来的表单集合，改成这样传递表单。
def get(self, request, *args, **kwargs):
form = self.settings_form_class
formset = self.default_form_class
return self.render_to_response(self.get_context_data(form = form, formset = formset))
我之前不知道这样是可以的！再次感谢大家。
1
对于两个表单来说，使用表单集（formsets）其实有点过于复杂了。这其实并不难，但文档写得不太好。你可以把两个表单设置成同一种类型，只需要加个前缀就行。
def parent_apply(request):
if request.method == 'POST':
parent_form = SignupForm(request.POST, prefix="parent")
student_form = StudentApplyForm(request.POST, prefix="student")
if parent_form.is_valid() and student_form.is_valid():
parent = parent_form.save()
student = student_form.save(parent)
else: messages.error(request, "Please correct the errors marked in red.")
else:
parent_form = SignupForm(prefix="parent")
student_form = StudentApplyForm(prefix="student")
return render_to_response('template_path/forms.html', { 'parent_form':parent_form, 'student_form':student_form }, context_instance=RequestContext(request))
这些表单就是普通的Django表单，不需要什么特别的设置。你可以选择验证和保存的顺序，甚至可以在一个表单没有通过验证的情况下，仍然保存另一个表单。
在你的HTML模板中，把两个表单放在同一个标签里，这样它们就可以同时提交。如果你想让这两个表单分别去不同的处理函数，就要指定两个不同的元素。