我假设您希望第一个表单的结果确定第二个表单的字段数及其标签，您可能需要查看Django form wizards。但这是一种简单的非表单向导（可能不太理想/可维护）的方法，利用表单集的__init__ 方法来修改表单标签*：
forms.py：
# File: forms.py
from django import forms
from django.forms.formsets import BaseFormSet
# What you've called 'GetMachine'
class MachineForm(forms.Form):
no_of_lines = forms.IntegerField(max_value=4)
# What you've called 'GetLine'
class LineForm(forms.Form):
beamline_name = forms.CharField(max_length=15, label='Name of Beamline')
# Create a custom formset and override __init__
class BaseLineFormSet(BaseFormSet):
def __init__(self, *args, **kwargs):
super(BaseLineFormSet, self).__init__(*args, **kwargs)
no_of_forms = len(self)
for i in range(0, no_of_forms):
self[i].fields['beamline_name'].label += "-%d" % (i + 1)
views.py：
# File: views.py
from django.forms.formsets import formset_factory
from django.shortcuts import render_to_response
from django.template import RequestContext
from django.http import HttpResponseRedirect
from django.core.urlresolvers import reverse
from forms import MachineForm, LineForm, BaseLineFormSet
def get_no_of_lines(request):
if request.method == 'POST':
machine_form = MachineForm(request.POST)
if machine_form.is_valid():
# At this point, form fields have already been
# converted to Python data types :)
# so no need to convert `line_no` to an integer
no_of_lines = machine_form.cleaned_data['no_of_lines']
return HttpResponseRedirect(reverse('line_form', kwargs={'no_of_lines': no_of_lines}))
else:
# It looks to me like you probably don't mean to
# use formsets here (but a form instead)
machine_form = MachineForm()
c = RequestContext(request, {
'machine_form': machine_form,
})
return render_to_response('get_no_of_lines.html', c)
def line_form(request, no_of_lines):
# You probably should validate this number (again).
# In fact, you probably need to validate first form (MachineForm).
# ...But I'm assuming it'll be valid in this example.
no_of_lines = int(no_of_lines)
LineFormSet = formset_factory(LineForm, extra=no_of_lines, formset=BaseLineFormSet)
if request.method == "POST":
formset = LineFormSet(request.POST, request.FILES)
if formset.is_valid():
pass
# Do stuff with form submission
# Redirect
else:
formset = LineFormSet()
c = RequestContext(request, {
'formset': formset,
})
return render_to_response('line_form.html', c)
urls.py:
from django.conf.urls import url, patterns
from views import get_no_of_lines, line_form
urlpatterns = patterns('',
url(r'^$', get_no_of_lines, name='get_no_of_lines'),
url(r'^line_form/(?P<no_of_lines>\d{1})$', line_form, name='line_form'),
)
get_no_of_lines.html：
<form method="POST">
{% csrf_token %}
{{ machine_form }}
</form>
line_form.html：
<form method="POST">
{% csrf_token %}
{{ formset.as_p }}
我之所以说这种方法可能不是最好的方法是因为你必须验证 no_of_lines 被传递给 line_form 视图（可能 > 4，所以你必须执行验证在这里并介绍验证逻辑，而不是把它放在一个地方——表单）。如果您需要在第一个表单中添加一个新字段，您可能最终不得不修改代码。因此，为什么我建议您查看form wizards。