FormView CBV根据请求更改ModelForm [英] FormView CBV change ModelForm per request

问题描述

我正在尝试建立一个向导来填充DataBase中的数据。
我尝试session.Wizard与成功加上我不认为这是ti需要。
如果我错了，请纠正我

所以基本上我的数据库有一些需要填写的表，
因为关节需要完成后，我想制作一个很棒的向导，让你一路走来。

所以我有一个基本的模板，它会有步骤，有时不需要创建一个新的数据，如果存在，所有就绪。
所以我已经在模板上显示了每个表格，所以用户可以检查表中是否包含他需要下一步或他需要创建的表。

我做了一个cbv FormView
，我试图从GET获取一步，并加载所需的ModelForm

model.py

  A类（models.Model）：
 user = CharField（）
 class B（models.Model）：
 pupy = CahrField（）
  

form.py

  AForm（forms.ModelForm）：
 class Meta：
 model = A 
 fields = ['user'] 
 
 BForm（forms.ModelForm）：
 class Meta：
 model = B 
 fields = ['pupy'] 
  

views.py

 类向导（FormView）
 template_name = 'test.html'
 def get（self，request，* args，** kwargs）：
 self.step = self.request.GET.get（'step'）
 self。 form_class = FORM [self.step]＃F ORM = dict {'step'：ModelForm} 
 def form_valid（self，form）：
 self.object = form.save（commit = False）
 self.object.save（）
  

我无法在这里输入所有已经尝试的一切，基本上我
确实得到我的通过叮叮叮叮叮叮ing cl to h h h uble uble uble uble uble uble uble uble uble uble，，，，，，if if if if if>>>>>>>>>>>>>> pre> def __init__
self.step ='first_step'


只是作为一个测试

解决方案

发现另一个帖子的答案是通过组合2个人回答
form_class和template_name的切换案例

@Denny Crane

  class Foo（FormView）：
 def dispatch ，request，* args，** kwargs）：
 self.var = request.session ['sessi onvar'] ['var'] 
如果self.var == some_value：
 form_class = form1 
 template_name = template1 
 elif self.var == another_value：
 form_class = form2 
 template_name = template2 
 [...] 
 return super（Foo，self）.dispatch（request，* args，** kwargs）
  

@Serafeim

需要重写get_form_class（）以及

  def get_form_class（s​​elf）：
 self.form_class = FORM [self.step] 
 return self.form_class 
  

I am trying to build a Wizard for populating data in to DataBase. I try the session.Wizard with out success plus I don't think this is what ti need. correct me if I am wrong.

so basically my database have some tables which needs to be fill, because of the joints need to be done, I wanted to make a nice wizard which takes you along the way.

so I have a base template which would have steps, sometimes there would be no need in creating a new data if exists all ready. so I have made a display of each table on template so user can check if the table contain what he needs for next step or he needs to create it.

I made a cbv FormView and I am trying to get the step from GET and load the needed ModelForm

model.py

Class A(models.Model):
    user = CharField()
class B(models.Model):
    pupy = CahrField()

form.py

AForm(forms.ModelForm):
    class Meta:
        model=A
        fields = ['user']

BForm(forms.ModelForm):
    class Meta:
        model=B
        fields = ['pupy']

views.py

class Wizard(FormView)
    template_name = 'test.html'
    def get(self, request, *args, **kwargs):
        self.step = self.request.GET.get('step')
        self.form_class = FORM[self.step] # FORM = dict {'step': ModelForm}
    def form_valid(self, form):
        self.object = form.save(commit=False)
        self.object.save()

I can't type here everything I have tried so far, basically I do get my form in to the html by clinking the links but I am having a truble saving them, I have manage to save the first form if I I do

def __init__
    self.step = 'first_step'

just as a test

解决方案

found an answer from another post that is working by combining 2 people answer Switch case for form_class and template_name

@Denny Crane

class Foo(FormView):
    def dispatch(self, request, *args, **kwargs):
        self.var = request.session['sessionvar']['var']
        if self.var == some_value:
            form_class = form1
            template_name = template1
        elif self.var == another_value:
            form_class = form2
            template_name = template2
        [...]
        return super(Foo, self).dispatch(request, *args, **kwargs)

@Serafeim

need to override get_form_class() as well

def get_form_class(self):
    self.form_class = FORM[self.step]
    return self.form_class

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