How to Create Django Form Choice List from Query in View?

Question

I have a Django form where I would like to use dynamic choice list from a query in my view.

Here is what I'm trying to do:

views.py

 getdata = MyModel.objects.filter(filter=filter)

 form = MyForm(request.POST or None,
              mylist=[( (getdata.id), (getdata.name) ) for choice in getdata]

when I run that I get 'QuerySet' object has no attribute 'id' error.

I know I can use ModelChoiceField and do the query in my form but for this specific case I would rather use the list generated in my view.

Answer 1

choice是每次迭代中的单个项目，而不是getdata 。

mylist=[( (choice.id), (choice.name) ) for choice in getdata]

Answer 2

try:

form = MyForm(request.POST or None,
          mylist=[( (choice.id), (choice.name) ) for choice in getdata]

when you iterate like that be it in list comprehension, here or dict comprehension you need to think the same way you do when you write a for loop:

for choice in getdata:
    #do something