【发布时间】：2013-08-02 12:32:27
【问题描述】：
我正在 python/django 中创建一个表单集，并且需要在单击按钮时向表单集动态添加更多字段。我正在处理的表格是针对我的学校询问学生他们想向谁披露某些学术信息的，这里的按钮允许他们添加更多字段以输入他们想向其披露的家庭成员/人。
我的按钮工作到显示额外字段的位置，您可以添加任意数量的字段。问题是，之前输入到现有字段中的数据被删除了。但是，只有表单集中的内容会被删除。之前在表单中填写的所有其他内容都将保持不变。
有什么方法可以让表单集保留按下按钮之前输入的数据？
form.py:
from django import forms
from models import Form, ParentForm, Contact
from django.core.exceptions import ValidationError
def fff (value):
if value == "":
raise ValidationError(message = 'Must choose a relation', code="a")
# Create your forms here.
class ModelForm(forms.ModelForm):
class Meta:
model = Form
exclude = ('name', 'Relation',)
class Parent(forms.Form):
name = forms.CharField()
CHOICES3 = (
("", '-------'),
("MOM", 'Mother'),
("DAD", 'Father'),
("GRAN", 'Grandparent'),
("BRO", 'Brother'),
("SIS", 'Sister'),
("AUNT", 'Aunt'),
("UNC", 'Uncle'),
("HUSB", 'Husband'),
("FRIE", 'Friend'),
("OTHE", 'Other'),
("STEP", 'Stepparent'),
)
Relation = forms.ChoiceField(required = False, widget = forms.Select, choices = CHOICES3, validators = [fff])
models.py
from django.db import models
from django import forms
from content.validation import *
from django.forms.models import modelformset_factory
class Contact(models.Model):
name = models.CharField(max_length=100)
class Form(models.Model):
CHOICES1 = (
("ACCEPT", 'I agree with the previous statement.'),
)
CHOICES2 = (
("ACADEMIC", 'Academic Records'),
("FINANCIAL", 'Financial Records'),
("BOTH", 'I would like to share both'),
("NEITHER", 'I would like to share neither'),
("OLD", "I would like to keep my old sharing settings"),
)
Please_accept = models.CharField(choices=CHOICES1, max_length=200)
Which_information_would_you_like_to_share = models.CharField(choices=CHOICES2, max_length=2000)
Full_Name_of_Student = models.CharField(max_length=100)
Carthage_ID_Number = models.IntegerField(max_length=7)
I_agree_the_above_information_is_correct_and_valid = models.BooleanField(validators=[validate_boolean])
Date = models.DateField(auto_now_add=True)
name = models.ManyToManyField(Contact, through="ParentForm")
class ParentForm(models.Model):
student_name = models.ForeignKey(Form)
name = models.ForeignKey(Contact)
CHOICES3 = (
("MOM", 'Mother'),
("DAD", 'Father'),
("GRAN", 'Grandparent'),
("BRO", 'Brother'),
("SIS", 'Sister'),
("AUNT", 'Aunt'),
("UNC", 'Uncle'),
("HUSB", 'Husband'),
("FRIE", 'Friend'),
("OTHE", 'Other'),
("STEP", 'Stepparent'),
)
Relation = models.CharField(choices=CHOICES3, max_length=200)
def __unicode__(self):
return 'name: %r, student_name: %r' % (self.name, self.student_name)
和views.py
from django.shortcuts import render
from django.http import HttpResponse
from form import ModelForm, Parent
from models import Form, ParentForm, Contact
from django.http import HttpResponseRedirect
from django.forms.formsets import formset_factory
def create(request):
ParentFormSet = formset_factory(Parent, extra=1)
if request.POST:
Parent_formset = ParentFormSet(request.POST, prefix='Parent_or_Third_Party_Name')
if 'add' in request.POST:
list=[]
for kitties in Parent_formset:
list.append({'Parent_or_Third_Party_Name-0n-ame': kitties.data['Parent_or_Third_Party_Name-0-name'], 'Parent_or_Third_Party_Name-0-Relation': kitties.data['Parent_or_Third_Party_Name-0-Relation']})
Parent_formset = ParentFormSet(prefix='Parent_or_Third_Party_Name', initial= list)
form = ModelForm(request.POST)
if form.is_valid() and Parent_formset.is_valid():
form_instance = form.save()
for f in Parent_formset:
if f.clean():
(obj, created) = ParentForm.objects.get_or_create(name=f.cleaned_data['name'], Relation=f.cleaned_data['Relation'])
return HttpResponseRedirect('http://Google.com')
else:
form = ModelForm()
Parent_formset = ParentFormSet(prefix='Parent_or_Third_Party_Name')
return render(request, 'content/design.html', {'form': form, 'Parent_formset': Parent_formset})
def submitted(request):
return render(request, 'content/design.html')
提前谢谢你！
【问题讨论】：
标签： python database django django-forms