我假设您希望第一个表单的结果来确定第二个表单的字段数量及其标签，您可能需要查看Django 表单向导。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*：
表格.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)
视图.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)
网址.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 }}
The reason why I say this approach is probably not the best way to do this is because you have to validate no_of_lines being passed to line_form view (which could be > 4, so you'll have to perform validation here and introduce validation logic rather than having it one place — the form). And if you need to add a new field to the first form, you'll likely end up having to modify the code. So hence why I'd recommend looking into form wizards.