我有一个基于类的 View ,它应该根据动物的名称动态选择一个表单。
UpdateAnimalView(FormMixin, DetailView):
def get_form_class(self):
SOME_FORMS = {
"Dog" : "UpdateDogForm",
"Cat" : "UpdateCatForm",
"Frog" : "UpdateFrogForm",
}
animal = object
animal_type = object.type #returns "Dog", "Cat" or "Frog"
form_class_name = SOME_FORMS[animal_type]
#form_class_name now takes the values "UpdateDogForm"
#, "UpdateCatForm" or "UpdateFrogFrom"
return form_class_name
但是,当我运行它时,它似乎不是读取 form_class
而是作为 string
并且 Django 抛出此错误:
'str' 对象不可调用
回溯来自 get_context_data
。我推断调用堆栈如下:
def get_form(self, form_class=None):
form = super(UpdateAnimalView, self).get_form()
return form
def get_context_data(self, **kwargs):
context = super(UpdateAnimalView, self).get_context_data(**kwargs)
context['form'] = self.get_form()
return context
如何将 form_class
作为其正确的数据类型而不是字符串返回?
最佳答案
get_form_class
应该返回实际的类,而不是它的名字:
# import the form classes from wherever they live
from .forms import UpdateDogForm, UpdateCatForm, UpdateFrogForm
...
SOME_FORMS = {
"Dog": UpdateDogForm, # <- no string values here!
"Cat": UpdateCatForm, # <-
"Frog": UpdateFrogForm, # <-
}
关于python - 覆盖 Django 的 get_form_class() 方法抛出字符串错误,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/37511232/