一视图多表单的实现    作者:zjxplq发表于2009-05-20 18:58:15

	   

	   书pro django的学习笔记，下面的例子引用于pro django的第10章

一视图多表单功能在做东西时要用，想了两种替代方案：

1、用两个视图，每个视图各一个表单，一个视图提交后自动重定向到另一个视图，此时用的是HttpResponseRedirect

2、在应用中提交第一个视图时，需要显示一个提交成功的信息，所以又使用session，来传递第二个视图的url

但这两种方案总感觉不好，结果在pro_django书中找到了解决方案。



两个model:

[b]models.py[/b][code]from django.db import models

from django.contrib.auth.models import User

from django.contrib.localflavor.us import models as us_models



from chapter11.history import models as history_models



class Contact(models.Model):

    user = models.OneToOneField(User)

    phone_number = us_models.PhoneNumberField()

    address = models.CharField(max_length=255)

    city = models.CharField(max_length=255)

    state = us_models.USStateField()

    zip_code = models.CharField(max_length=255)[/code]两个forms

[b]forms.py[/b][code]from django import forms

from django.contrib.localflavor.us import forms as us_forms

from django.contrib.auth.models import User



from chapter10.contacts.models import Contact



class UserEditorForm(forms.ModelForm):

    class Meta:

        model = User

        fields = ('username', 'first_name', 'last_name', 'email')



class ContactEditorForm(forms.ModelForm):

    phone_number = us_forms.USPhoneNumberField(required=False)

    state = us_forms.USStateField(widget=us_forms.USStateSelect, required=False)

    zip_code = us_forms.USZipCodeField(label='ZIP Code', required=False)



    class Meta:

        model = Contact

        exclude = ('user',)

[/code]一个视图

[b]views.py[/b][code]from django.shortcuts import render_to_response, get_object_or_404

from django.template import RequestContext

from django.http import HttpResponseRedirect

from django.core.urlresolvers import reverse



from chapter10.contacts import forms, models



def edit_contact(request, username=None, template_name='contacts/editor_form.html'):

    # Set up some default objects if none were defined.

   # 如果username不为空，则从User库中获取相关信息，实现了编辑功能

  # 如username为空，实现创建功能

    if username:

        user = get_object_or_404(models.User, username=username)

        try:

            contact = user.contact

        except models.Contact.DoesNotExist:

            contact = models.Contact(user=user)

    else:

        user = models.User()

        contact = models.Contact(user=user)



    if request.method == 'POST':

        user_form = forms.UserEditorForm(request.POST, instance=user)

        contact_form = forms.ContactEditorForm(request.POST, instance=contact)

        if user_form.is_valid() and contact_form.is_valid():

            user = user_form.save()



           # 下面这句话相当重要，设置contact的user属性

            contact_form.cleaned_data['user'] = user

            contact = contact_form.save()

            return HttpResponseRedirect(reverse('contact_detail',

                                                kwargs={'slug': user.username}))

    else:

        user_form = forms.UserEditorForm(instance=user)

        contact_form = forms.ContactEditorForm(instance=contact)

    return render_to_response(template_name, {

        'username': username,

        'user_form': user_form,

        'contact_form': contact_form,

    }, context_instance=RequestContext(request))[/code]

[[i] 本帖最后由 zjxplq 于 2009-5-20 19:09 编辑 [/i]]