如何避免在ModelForm和CreateView类中重复字段列表？ [英] How to avoid repeating field list in ModelForm and CreateView class?

问题描述

我正在使用 django.forms.ModelForm 和 django.views.generic.CreateView 创建一个创作查看我的模型。

我发现我最终得到这个代码：

forms.py： / p>

  class ScenarioForm（forms.ModelForm）：
 class Meta：
 model = Scenario 
 fields = ['scenario_name'，'description'，
'scenario_file'，'preview'] 
  

views.py：

  class ScenarioUpload（generic.CreateView）：
 model = Scenario 
 fields = ['scenario_name'，'description'，
'scenario_file'，'preview'] 
 form_class = ScenarioForm 
  

似乎真的很糟糕的重复。有没有什么我做错了，还是有些方法可以避免这种情况？

解决方案

Tony的回答有正确的想法，但是它实际上必须被编码的方式是使用新风格类，混合列表首先列在派生类中：

  class MetaScenario（object）：
 model = Scenario 
 fields = ['scenario_name'，'description'，
'scenario_file'，'preview'] 
 
 class ScenarioForm （forms.ModelForm）：
 Meta = MetaScenario 
 
 class ScenarioUpload（MetaScenario，generic.CreateView）：
 form_class = ScenarioForm 
  / pre> 
I'm using django.forms.ModelForm and django.views.generic.CreateView to create a creation view for my model.

I find that I end up with this code:

forms.py:
class ScenarioForm(forms.ModelForm):
    class Meta:
        model = Scenario
        fields = ['scenario_name', 'description',
                  'scenario_file', 'preview']     
views.py:
class ScenarioUpload(generic.CreateView):
    model = Scenario
    fields = ['scenario_name', 'description',
              'scenario_file', 'preview']     
    form_class = ScenarioForm
It seems like really bad repetition.  Is there something I'm doing wrong, or some way I can avoid this?
解决方案
Tony's answer has the right idea, but the way it actually has to be coded is using "new style" classes, with the mixin listed first in the derived class:
class MetaScenario(object):   
    model = Scenario
    fields = ['scenario_name', 'description',
              'scenario_file', 'preview']

class ScenarioForm(forms.ModelForm):
    Meta = MetaScenario

class ScenarioUpload(MetaScenario, generic.CreateView):
    form_class = ScenarioForm


                        
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