Question

我找到了一些方法，但在从表单中提取数据方面遇到了麻烦。下面是我的表单及其post（）方法。验证工作正常，但如何在app引擎的django版本中获取“清理”数据？

def get_type(): 
    return [(str(type.key()), type.name) for type in GreType.all()] 

class LatField(forms.Field):
    def clean(self,value):
        x = None
        try:
            x = float(value)
            if x > 90.0 or x < -90.0:
                x = None
        except:
            x = None
        if x is None:
            raise forms.ValidationError("Latitude should be a number between 90.00 and -90.00")

class LonField(forms.Field):
    def clean(self,value):
        x = None
        try:
            x = float(value)
            if x > 180.0 or x < -180.0:
                x = None
        except:
            x = None
        if x is None:
            raise forms.ValidationError("Longitude should be a number between 180.00 and -180.00")

class LocationForm(forms.Form):
    type = forms.ChoiceField(choices=get_type())
    name = forms.CharField(max_length=100)
    desc = forms.CharField(widget=forms.Textarea(), required=False)
    lat = LatField()
    lon = LonField()

class LocationHandler(webapp.RequestHandler):
  def get(self):
    template_data = { 'form' : LocationForm() }
    template_path = os.path.join(os.path.dirname(__file__), '../template/location.html')
    self.response.headers['Content-Type'] = 'text/html'
    self.response.out.write(template.render(template_path, template_data))

  def post(self):
    data = LocationForm(data=self.request.POST)
    if data.is_valid():
        # what to do here?
        self.redirect('/locations')

我的验证例程可能有一些冗余，但我不清楚python范围

我传递了一个基于模型的表单（earlier question）来获取单独的lat和lon字段。）

Answer 1

self.cleaned_data中提供的已清理数据。这个例子工作正常：

class BlogCreateForm(forms.ModelForm):
    class Meta:
        model   = Blog
        exclude = ('author',)

    def clean_slug(self):
        '''Prevent duplicate blogs with equal key names'''
        # blog with given url address already exists
        if self.Meta.model.get_by_key_name(self.cleaned_data['slug']):
            raise forms.ValidationError("Blog with url '%s' already exists" %
                                         self.cleaned_data['slug'])
        return self.cleaned_data['slug']

如果您使用内置版return self.cleaned_data['slug']，请将return self.clean_data['slug']替换为Django。

尝试使用专为 Google App Engine设计的http://gaeframework.com - Python 网络框架

在app引擎，嵌入式django中为myform（forms.Form）编写post（）

1 个答案: