變化形式動態地在Django

Question

有一種方式來加載一個Django成槽AJAX？比方說，用戶需要根據自己需要更改表單。首先出現帶有選擇字段和小數字段的表單。然後，取決於choicefield的價值，在視圖中的Ajax請求可以將其更改爲另一種形式或保持不變：

forms.py

a_choices = (
("a", "A"), 
("b", "B"), 
("c", "C"), 
) 

d_choices = (
("d", "D"), 
("e", "E"), 
) 


class simpleForm(forms.Form): 
    #this is the first form 
    def __init__(self, *args, **kwargs): 
     choices = kwargs.pop('method') 
     super(simpleForm, self).__init__(*args, **kwargs) 
     self.fields["chosen_method"].choices = choices 

    chosen_method = forms.ChoiceField(label="Método") 
    simple_variable = forms.DecimalField() 

class complexForm(simpleForm): 

    second_variables = forms.DecimalField() 
    third_variable = forms.DecimalField() 

我試着像這樣的AJAX的方式，誰手錶的變化choicefield值（#id_chosen_method）：

ajax_form.js

(function ($) { 
explanation = function() { 
    $("#id_chosen_method").change(function() { 
     var election = $("#id_chosen_method").val(); 
     // Add or remove fields depending of method chosen 
     $.getJSON("/form2/" + election + "/", function (data) { 
      if (data) 
      { 
       $("#form_fields").html(data.form); 
       $("#explanation_text").html(data.explanation); 
      } 
      else 
      { 
       $("#form_fields").html("no form!"); 
       $("#explanation_text").html("no explanation!"); 
      } 
     }); 
    }); 
}; 
})(jQuery); 

最後的URL和視圖誰得到由javascri通過了「法」的說法PT功能：

#url.py 
url(r'^/form2/(?P<method>\w+)/$', ajax_form, name='ajax_form'), 

#views.py 
def ajax_form(request, method): 

    import json 
    from app.forms import simpleForm, complexForm 
    from app.otherFile import explanations 

    if request.is_ajax: 
     form_choices = (("a", "b", "c",),("f", "g")) 
     if method in form_choices[0]: 
      if method == form_choices[0][-1]: 
       form = simpleForm(method=a_choices) 
      else: 
       form = simpleForm(method=d_choices) 
     else: 
      if method == form_choices[1][1]: 
       form = complexForm(method=a_choices) 
      else: 
       form = complexForm(method=d_choices) 

     explanation = explanations[method] 
     data = {"form": form, "explanation": explanation} 
     return HttpResponse(json.dumps(data), mimetype="application/javascript") 
    else: 
     raise Http404 

所以最終的想法是用戶選擇都想取決於choicefield的VAL顯示在第一位什麼樣的形式。但我無法得到這個工作。我錯過了什麼嗎？有更好的方法來處理這樣的事情嗎？

Answer 1

我會用一個鹼形式的類，並具有兩種不同的形式從所述基部一個繼承。您可以根據用戶輸入通過ajax加載不同的表單。你甚至可以使用相同的模板來表格。您的觀點將有類似

form=simpleFormA() 

和

form=simpleFormB() 

基於什麼 '方法' 是。 forms.py會改變爲這樣的：

_a_choices = (
("a", "A"), 
("b", "B"), 
("c", "C"), 
) 

_d_choices = (
("d", "D"), 
("e", "E"), 
) 


class simpleForm(forms.Form): 
    # this is the first form 
    # all other fields here 
    simple_variable = forms.DecimalField() 

class simpleFormA(simpleForm): 
    chosen_method = forms.ChoiceField(label="Método", choices=_a_choices) 

class simpleFormB(simpleForm): 
    chosen_method = forms.ChoiceField(label="Método", choices=_b_choices) 

有意義嗎？