我正在尝试采用一种使用Django-Crispy-Forms布局功能将嵌套表单集与主表单一起保存的方法，但是我无法保存它。我正在关注this代码示例项目，但无法验证表单集以保存数据。如果有人能指出我的错误，我将非常感激。我还需要在同一视图中为EmployeeForm添加三个内联。我尝试了Django-Extra-Views，但无法正常工作。如果您建议为同一视图（如5左右）添加多个内联，将不胜感激。我想实现一个页面来创建Employee及其内联，例如Education, Experience, Others。下面是代码：
型号：
class Employee(models.Model):
user = models.OneToOneField(User, on_delete=models.CASCADE, related_name='employees',
null=True, blank=True)
about = models.TextField()
street = models.CharField(max_length=200)
city = models.CharField(max_length=200)
country = models.CharField(max_length=200)
cell_phone = models.PositiveIntegerField()
landline = models.PositiveIntegerField()
def __str__(self):
return '{} {}'.format(self.id, self.user)
def get_absolute_url(self):
return reverse('bars:create', kwargs={'pk':self.pk})
class Education(models.Model):
employee = models.ForeignKey('Employee', on_delete=models.CASCADE, related_name='education')
course_title = models.CharField(max_length=100, null=True, blank=True)
institute_name = models.CharField(max_length=200, null=True, blank=True)
start_year = models.DateTimeField(null=True, blank=True)
end_year = models.DateTimeField(null=True, blank=True)
def __str__(self):
return '{} {}'.format(self.employee, self.course_title)
查看：
class EmployeeCreateView(CreateView):
model = Employee
template_name = 'bars/crt.html'
form_class = EmployeeForm
success_url = None
def get_context_data(self, **kwargs):
data = super(EmployeeCreateView, self).get_context_data(**kwargs)
if self.request.POST:
data['education'] = EducationFormset(self.request.POST)
else:
data['education'] = EducationFormset()
print('This is context data {}'.format(data))
return data
def form_valid(self, form):
context = self.get_context_data()
education = context['education']
print('This is Education {}'.format(education))
with transaction.atomic():
form.instance.employee.user = self.request.user
self.object = form.save()
if education.is_valid():
education.save(commit=False)
education.instance = self.object
education.save()
return super(EmployeeCreateView, self).form_valid(form)
def get_success_url(self):
return reverse_lazy('bars:detail', kwargs={'pk':self.object.pk})
表格：
class EducationForm(forms.ModelForm):
class Meta:
model = Education
exclude = ()
EducationFormset =inlineformset_factory(
Employee, Education, form=EducationForm,
fields=['course_title', 'institute_name'], extra=1,can_delete=True
)
class EmployeeForm(forms.ModelForm):
class Meta:
model = Employee
exclude = ('user', 'role')
def __init__(self, *args, **kwargs):
super(EmployeeForm, self).__init__(*args, **kwargs)
self.helper = FormHelper()
self.helper.form_tag = True
self.helper.form_class = 'form-horizontal'
self.helper.label_class = 'col-md-3 create-label'
self.helper.field_class = 'col-md-9'
self.helper.layout = Layout(
Div(
Field('about'),
Field('street'),
Field('city'),
Field('cell_phone'),
Field('landline'),
Fieldset('Add Education',
Formset('education')),
HTML("<br>"),
ButtonHolder(Submit('submit', 'save')),
)
)
根据示例的自定义布局对象：
from crispy_forms.layout import LayoutObject, TEMPLATE_PACK
from django.shortcuts import render
from django.template.loader import render_to_string
class Formset(LayoutObject):
template = "bars/formset.html"
def __init__(self, formset_name_in_context, template=None):
self.formset_name_in_context = formset_name_in_context
self.fields = []
if template:
self.template = template
def render(self, form, form_style, context, template_pack=TEMPLATE_PACK):
formset = context[self.formset_name_in_context]
return render_to_string(self.template, {'formset': formset})
Formset.html：
{% load static %}
{% load crispy_forms_tags %}
{% load staticfiles %}
<table>
{{ formset.management_form|crispy }}
{% for form in formset.forms %}
<tr class="{% cycle 'row1' 'row2' %} formset_row-{{ formset.prefix }}">
{% for field in form.visible_fields %}
<td>
{# Include the hidden fields in the form #}
{% if forloop.first %}
{% for hidden in form.hidden_fields %}
{{ hidden }}
{% endfor %}
{% endif %}
{{ field.errors.as_ul }}
{{ field|as_crispy_field }}
</td>
{% endfor %}
</tr>
{% endfor %}
</table>
<br>
<script src="//ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js">
</script>
<script src="{% static 'js/jquery.formset.js' %}">
</script>
<script type="text/javascript">
$('.formset_row-{{ formset.prefix }}').formset({
addText: 'add another',
deleteText: 'remove',
prefix: '{{ formset.prefix }}',
});
</script>
终端或其他方面没有错误。非常感谢您的帮助。
您目前不在CreateView中处理表单集。该视图中的form_valid将仅处理父表单，而不处理表单集。我认为您应该做的是重写post方法，在那里您需要验证表单和附加到它的任何表单集：
def post(self, request, *args, **kwargs):
form = self.get_form()
# Add as many formsets here as you want
education_formset = EducationFormset(request.POST)
# Now validate both the form and any formsets
if form.is_valid() and education_formset.is_valid():
# Note - we are passing the education_formset to form_valid. If you had more formsets
# you would pass these as well.
return self.form_valid(form, education_formset)
然后您像这样修改form_valid：
def form_valid(self, form, education_formset):
with transaction.atomic():
form.instance.employee.user = self.request.user
self.object = form.save()
# Now we process the education formset
educations = education_formset.save(commit=False)
for education in educations:
education.instance = self.object
education.save()
# If you had more formsets, you would accept additional arguments and
# process them as with the one above.
# Don't call the super method here - you will end up saving the form twice.
return HttpResponseRedirect(self.get_success_url())
他们目前正在使用get_context_data()的方式是不正确的。该方法仅应用于获取上下文数据以渲染模板。您不应该从form_valid()方法中调用它。相反，您需要如上所述从post()方法将表单集传递给此方法。