以表單（django）傳遞數據庫值

Question

我的form.py ：

class BannerForm(forms.ModelForm):
    name = forms.CharField(max_length=32)
    #Affiliazione = forms.CharField(disabled = True, initial='red') #in original question
    #affiliation = forms.ModelChoiceField(Affiliation.objects.all(),
    #widget=forms.HiddenInput(), initial=Affiliation.objects.get(id=1))  #in original question
    Affiliazione = forms.CharField(disabled = True, required=False) #added after first answer
    affiliation = forms.ModelChoiceField(Affiliation.objects.all(),
    widget=forms.HiddenInput()) #added after first answer

“ Affiliazione”字段顯示為“紅色”，但未保存，因為Disabled控件無法成功執行 。 “從屬關系”字段實際上傳遞數據，但被隱藏。 它們一起提供了我想要的內容（一個禁用的字段，用於傳遞數據，以便用戶可以看到該值但不能更改它）。

問題是我不喜歡對值（“ red”和“ id = 1”）進行硬編碼。 我在模型中選擇了要傳遞的值的“選項”類，但我不知道如何……我認為這是一個愚蠢的問題，對不起，但是有人可以幫助我嗎？

我的models.py ：

class Options(models.Model):
    new_affiliation = models.ForeignKey('Affiliation')

class Affiliation(models.Model):
    name = models.CharField(max_length=32, unique=True)
    def __str__(self):
        return self.name

class Banner(models.Model):
    name = models.CharField(max_length=32, unique=True)
    affiliation = models.ForeignKey(Affiliation)

編輯。 我的View.py ：

def add_banner(request):
    # A HTTP POST?
    if request.method == 'POST':
        form = BannerForm(request.POST)
        print('form is post') #control
        # Have we been provided with a valid form?
        if form.is_valid():
            print('form is valid') #control
            # Save the new banner to the database.
            banner = form.save(commit=False)
            #some irrilevant code here
            form.save(commit=True)
            print('form salvato') #control
            # Now call the homepage() view.
            # The user will be shown the homepage.
            return homepage(request)
        else:
            # The supplied form contained errors - just print them to the terminal
            print (form.errors)
    else:
        # If the request was not a POST, display the form to enter details
        #form = BannerForm(request.POST) #in original question
        #initial_value = 'red' #added after first answer
        #init = Affiliation.objects.get(id=1) #added after first answer
        form = BannerForm(request.POST or None, initial={
        'affiliation': Campaign_Options.new_regent_affiliation}) #added after first answer
    # Bad form (or form details), no form supplied...
    # Render the form with error messages (if any).
    print ('fine')
    return render(request, 'core/add_banner.html', {'form': form})

我的add_banner.html ：

  {% csrf_token %}
  {% for hidden in form.hidden_fields %}
  {{ hidden }}
  {% endfor %}

  {% for field in form.visible_fields %}
    {{ field.errors }}
    {{ field.label }}
    {{ field }}
    {{ field.help_text }}
    <br />
  {% endfor %}

Answer 1

即使我不太了解表單的意圖，但是為了回答您的問題，您可以在初始化表單時從視圖中傳遞初始值，這將使值變得靈活：

def your_view(request):
    # get the string for affilizione by applying your logic here
    # initial_value = 'red'
    form = BannerForm(request.POST or None, initial={'Affiliazione': initial_value})