Question

我试图将动态选择列表绑定到ModelForm。表单正确呈现。但是，当使用带有POST请求的表单时，我会返回一个空表单。我的目标是将该表单保存到数据库中（form.save（））。任何帮助将不胜感激。

型号

我使用了多项选择字段（https://github.com/goinnn/django-multiselectfield）

from django.db import models
from multiselectfield import MultiSelectField

class VizInfoModel(models.Model):

     tog = MultiSelectField()
     vis = MultiSelectField()

表单

class VizInfoForm(forms.ModelForm):

    class Meta:
        model = VizInfoModel
        fields = '__all__'

    def __init__(self,choice,*args,**kwargs):
        super(VizInfoForm, self).__init__(*args,**kwargs)
        self.fields['tog'].choices = choice 
        self.fields['vis'].choices = choice

查看

在实例化表单时从视图中传递选项。

def viz_details(request):

    options = []
    headers = request.session['headers']
    for header in headers :
        options.append((header, header))

    if request.method == 'POST':
        form = VizInfoForm(options, request.POST)
        #doesnt' get into the if statement since form is empty! 
        #choices are not bounded to the model although the form is perfectly rendered           
        if form.is_valid():
            form.save()
            return HttpResponseRedirect('/upload')
    else:
        #this works just fine
        form = VizInfoForm(options) 
        return render(request, 'uploads/details.html', {'form': form})

模板

  <form method="post" enctype="multipart/form-data">
        {% csrf_token %}

         <p>Choose variables to toggle between</p>
        {{ form.tog }}

        <br></br>
        <p>Choose variable to be visualized</p>
        {{ form.vis }}

        <br></br>

        <button type="submit">Submit</button>
    </form>

Answer 1

你说Django没有进入你的ParseAnonymousUtils.logIn(new LogInCallback() { @Override public void done(ParseUser user, ParseException e) { if (e != null) { Log.d("MyApp", "Anonymous login failed."); } else { Log.d("MyApp", "Anonymous user logged in."); } } });区块。

这告诉我们您没有通过POST方法发送请求。你的模板可能有错误，也许你没有在if request.method == 'POST'上指定方法，或者你的按钮只是一个链接而不是提交？

显示您的模板，以便我们可以说更多，除非这足以解决您的问题！

将动态选择绑定到Django中的ModelForm

1 个答案: