python - 以表单传递数据库值(django)

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

“隶属关系”字段显示“红色”，但未保存，因为 Disabled controls cannot be successful 。 “隶属关系”字段实际上传递数据，但被隐藏。它们一起提供了我想要的(一个传递数据的禁用字段，以便用户可以看到该值但无法更改它)。

问题是我不喜欢对这些值进行硬编码(“red”和“id=1”)。我在模型中有“选项”类，我在其中选择要传递的值，但我不知道如何...我认为这是一个愚蠢的问题，抱歉，但有人可以帮助我吗？

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)

编辑。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

即使我不太明白您的表单的意图，但为了回答您的问题，您可以在初始化表单时从 View 中传递初始值，这将使值变得灵活:

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})