給一個參數爲對象

我怎麼可以給一個額外的參數到的ModelForm對象喜歡這裏： initail的的ModelForm對象給一個參數爲對象

form = ChangeProfile(request.POST, initial={'first_name':costumer.first_name, 'last_name':costumer.last_name}, extraParameter)

，我怎麼能得到extraParameter在這個類：

class ChangeProfile(ModelForm):

它不是這樣的神的想法來創建這樣

def __init__(self, request, initial, extraParamter):

什麼個構造器我應該在這裏嗎？

來源

2013-04-23 hln

對於這種情況，您需要覆蓋__init__。

但是您的__init__的簽名有一個錯誤。

你應該這樣做：

class ChangeProfile(ModelForm): 
    def __init__(self, *args, **kwargs): 
     self.extraParameter = kwargs.pop("extraParameter") 
     super(ChangeProfile, self).__init__(*args, **kwargs) 
     #any other thing you want

從視圖：

extraParameter = "hello" 

#GET request 
form=ChangeProfile(initial={'first_name':costumer.first_name, 'last_name':costumer.last_name}, extraParameter=extraParameter) 

#POST request 
form=ChangeProfile(request.POST ,initial={'first_name':costumer.first_name, 'last_name':costumer.last_name}, extraParameter=extraParameter)

來源

2013-04-23 06:10:06

您可以傳遞參數在很多方面，比如一個簡單的Python類，你必須小心，只是爲了不打破的默認行爲的Django Forms/ModelForms。

class YourForm(forms.Form): 
    def __init__(self, custom_arg=None, *args, **kwargs): 
     # We have to pop the 'another_arg' from kwargs, 
     # because the __init__ from 
     # forms.Form, the parent class, 
     # doesn't expect him in his __init__. 
     self.another_arg = kwargs.pop('another_arg', None) 

     # Calling the __init__ from the parent, 
     # to keep the default behaviour 
     super(YourForm, self).__init__(*args, **kwargs) 

     # In that case, just our __init__ expect the custom_arg 
     self.custom_arg = custom_arg 

     print "Another Arg: %s" % self.another_arg 
     print "Custom Arg: %s" % self.custom_arg 


# Initialize a form, without any parameter 
>>> YourForm() 
Another Arg: None 
Custom Arg: None 
<YourForm object at 0x102cc6dd0> 

# Initialize a form, with a expected parameter 
>>> YourForm(custom_arg='Custom arg value') 
Another Arg: None 
Custom Arg: Custom arg value 
<YourForm object at 0x10292fe50> 

# Initialize a form, with a "unexpected" parameter 
>>> YourForm(another_arg='Another arg value') 
Another Arg: Another arg value 
Custom Arg: None 
<YourForm object at 0x102945d90> 

# Initialize a form, with both parameters 
>>> YourForm(another_arg='Another arg value', 
      custom_arg='Custom arg value') 
Another Arg: Another arg value 
Custom Arg: Custom arg value 
<YourForm object at 0x102b18c90>

來源

2013-04-23 06:10:33

給一個參數爲對象

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