预填充 Django 表单 [英] Pre-populating Django Forms
问题描述
我正在尝试从查询中获取 Django 表单,但我一直以错误的方式进行操作.查看了几个例子,但我做的有点不同.这是我的代码,
I'm trying to have a Django Form from a query, but I keep doing it the wrong way. Checked out a few examples, but I'm doing it a bit different. Here's my code,
乐形
class ItemForm(ModelForm):
class Meta:
model = Item
exclude = ('deleted')
和部分视图
def index(request):
user = User
try:
last_modified_list = ShoppingList.objects.filter(deleted='0').filter(owner=user).latest('date_modified')
items = Item.objects.filter(shopping_list=last_modified_list).filter(deleted='0')
except ObjectDoesNotExist:
items = Item.objects.filter(deleted='0')
last_used_currency = ExtendedUser.objects.filter(owner=user)
#currency = forms.CharField(initial=last_used_currency.last_currency)
try:
last_used_shoppinglist = ShoppingList.objects.filter(deleted='0').filter(owner=user).latest('date_modified')
except ObjectDoesNotExist:
last_used_shoppinglist = datetime.datetime.now()
item_form = ItemForm (request.POST or None)
item_form.fields["shopping_list"]=last_used_shoppinglist
if item_form.is_valid():
name = item_form.cleaned_data['name']
bought = item_form.cleaned_data['bought']
currency = item_form.cleaned_data['currency']
price = item_form.cleaned_data['price']
date_added = item_form.cleaned_data['date_added']
date_modified = item_form.cleaned_data['date_modified']
date_bought = item_form.cleaned_data['date_bought']
shopping_list = item_form.cleaned_data['shopping_list']
quantity = item_form.cleaned_data['quantity']
deleted = item_form.cleaned_data['deleted']
return render_to_response ('base.html',{'user':user,'items':items,'item_form':item_form}, context_instance=RequestContext(request))
shopping_list
行确实会导致许多错误.
The shopping_list
line is really leading to many errors.
推荐答案
您希望将对象作为 "实例".如果我正确理解您的代码并且您有一个名为item"的项目:
You want to pass the object into the form as "instance". If I understand your code correctly and you had a single Item named "item":
ItemForm(request.POST or None, instance=item)
不过,在这种情况下,您似乎想要一个 模型表单集,因此您可以一次编辑多个项目.然后你将你的 items
变量作为queryset"参数传入.
In this case though, it looks like you want a model formset so you can edit multiple items at once. Then you would pass your items
variable in as the "queryset" parameter.
实际解决方案是针对不同的问题,
Actual solution is for a different problem,
item_form.fields["shopping_list"].initial = last_used_shoppinglist
这篇关于预填充 Django 表单的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!