我使用formset生成额外的字段,但我不知道如何更改formset生成的额外字段的标签。
我的代码:
class GetMachine(forms.Form):
Number_of_Lines = forms.IntegerField(max_value=4)
class GetLine(forms.Form):
beamline_name = forms.CharField(max_length=15, label='Name of Beamline-%i')
def install(request):
MachineFormSet = formset_factory(GetMachine, extra=1)
formset = MachineFormSet()
if request.method == 'POST':
# formset = MachineFormSet(request.POST)
# if formset.is_valid(): # All validation rules pass
line_no = request.POST['form-0-Number_of_Lines']
GetLineFormSet = formset_factory(GetLine, extra=int(line_no))
formset = GetLineFormSet()
return render_to_response('install.html', { 'formset': formset, 'action': 'step1'})
return render_to_response('install.html', { 'formset': formset, })
install.html模板:
{% for form in formset.forms %}
{% for field in form %}
<tr>
<td>{{ field.label_tag }}</td> <td>{{ field }}</td><td>{{ field.errors }}</td>
</tr>
{% endfor %}
{% endfor %}
例如,如果“Number_of_Lines”= 2,那么我希望下一个带有标签的表单,
Name of Beamline-1:
Name of Beamline-2:
答案 0 :(得分:4)
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。但这是一个简单的,非形式向导(可能不太理想/可维护)的方法,利用formset的__init__
方法修改表单标签*:
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
传递给line_form
视图(可能是&gt; 4,所以你'我必须在这里执行验证并引入验证逻辑,而不是将它放在一个地方 - 表格。如果您需要在第一个表单中添加新字段,您可能最终必须修改代码。因此,为什么我建议调查form wizards。
答案 1 :(得分:0)
我能想到,实现此行为的唯一方法是在视图传递到模板之前调整视图中的FormSet。
您可以迭代不同的表单和标签,并相应地更改其值。
另一种可能的解决方案是将默认标签设置为“Beamline的名称 - ”。 在您的模板中执行类似
的操作{% for field in form %}
<td>{{ field.label_tag }}{{ forloop.counter1 }}</td>
{% endfor %}