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我正在通过以下方式基于元数据生成表单

class MeasureForm(forms.Form):
    def __init__(self,measure_id,*args,**kwrds):
        super(MeasureForm,self).__init__(*args,**kwrds)
        m = Measure.objects.get(pk=measure_id);
        if (m):
            self.fields["measure_id"] = forms.IntegerField(initial = m.id , widget=forms.HiddenInput())
            for mp in MeasureParameters.objects.filter(measure = m):
                # get the NVL'ed copy of the parameter
                p = mp.get_parameter_for_measure()
                if not p.is_modifiable:
                    # the file has a constant value
                    if (p.values and p.default): # contant must have both values and default index
                        value_ = p.values[p.values.keys()[p.default-1]];
                        self.fields[p.name] = forms.IntegerField(label = p.description , initial = value_);
                        self.fields[p.name].widget.attrs['readonly'] = True;
                    else:
                        raise Exception("Parameter set as unmodifiable but has no value. [measure: %s, parameter: %s, measureparameter %s]"
                                        % (measure_id , p.id , mp.__unicode__()))
                elif (p.values):
                    # convert hstore dict to list of tuples for the choices to read
                    values_ = [(v, k) for k, v in p.values.iteritems()];
                    # set default if exists , else take the first item
                    default_ = values_[p.default-1][0] if p.default else values_[0][0]
                    self.fields[p.name] = forms.ChoiceField(label = p.description , choices = values_ , initial = default_)
                else:
                    self.fields[p.name] = forms.IntegerField(label = p.description)
                if (not p.is_visible):
                    self.fields[p.name].widget = forms.HiddenInput()
        else:
            raise Exception ("Could not find measure. [measure %s]" % (measure_id));

这是我的看法

def index(request,measure_id = None):

    owners = Owner.objects.all()    
    form = None
    result = None
    title = None

    # handle the form
    if request.method == 'POST': # the form has been submitted
        form = MeasureForm(request.POST)
        if form.is_valid(): # All validation rules pass    
            result = 100; 
    else:
        if (measure_id):
            title = Measure.objects.get(pk=measure_id).name;
            # make an unbound form
            form = MeasureForm(measure_id) 

    return render(request, 'calc/index.html' ,
            {'owners' : owners, 
             'form'   : form , 
             'title'  : title , 
             'result' : result})

我按照本教程进行操作。当我发出提交回索引视图时遇到问题。我收到以下错误

int() argument must be a string or a number, not 'QueryDict'

我可以在转储中看到它在这一行中失败

m = Measure.objects.get(pk=measure_id);

所以我环顾四周，发现了这篇文章。我试图将调用更改为这样的表单

form = MeasureForm(request.POST, measure_id = request.POST.get('measure_id'))

我收到以下错误

__init__() got multiple values for keyword argument 'measure_id'

我的第一个问题是 - 为什么 django 再次执行 init。已经创建了一个表单对象 - 字段只需要从发布数据中获取绑定。

第二，我怎样才能克服这个？

**django 新手。谢谢。

4

1 回答 1

0

从 init 方法中删除 measure_id 并改为kwrds['measure_id']在内部检索它，然后将它们适当地用于关键字参数：

MeasureForm(request.POST, measure_id=measure_id)
MeasureForm(measure_id=measure_id)
于 2013-08-30T07:49:33.207 回答