1

我正在尝试instance使用 ajax 从服务器渲染/获取表单字段，并希望在某个位置显示该字段，所以

视图.py

def edit_book_email(request, book_id):
    book = Book.objects.get(id=book_id)
    form = BookEmailForm(instance = book)
    result = {
    'email_field':form.fields['email'],
    }
    print result,">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>"
    report_json = json.dumps(result, cls = DjangoJSONEncoder) 
    return HttpResponse(report_json, mimetype='application/json')

因此，从上面的代码中，我试图从表单中获取电子邮件字段并希望将其作为 json reposnse 发送，这样我就可以在需要的任何地方在模板中使用它

<html>
<head>
  <script>
    $.ajax({
                      type: "POST",
                              url: action,
                              data: form_data,
                              success: function(response)
                                {
                                   var form_field = '{{response.email_field}}' 
                                   $('.custom_design').html()   
   }
                      });        


      });

   });
  <script> 
</head>
<div>
   <span id="custom_design"><span>
</div>
</html>

但我面临以下错误

Traceback (most recent call last):
  File "/home/user/Envs/app/local/lib/python2.7/site-packages/django/core/handlers/base.py", line 115, in get_response
    response = callback(request, *callback_args, **callback_kwargs)
  File "/home/user/app/apps/apps-web_nw/projsite/apps/website/views.py", line 665, in edit_book_email
    report_json = json.dumps(result, cls = DjangoJSONEncoder)
  File "/usr/lib/python2.7/json/__init__.py", line 238, in dumps
    **kw).encode(obj)
  File "/usr/lib/python2.7/json/encoder.py", line 201, in encode
    chunks = self.iterencode(o, _one_shot=True)
  File "/usr/lib/python2.7/json/encoder.py", line 264, in iterencode
    return _iterencode(o, 0)
  File "/home/apps/Envs/apps/local/lib/python2.7/site-packages/django/core/serializers/json.py", line 103, in default
    return super(DjangoJSONEncoder, self).default(o)
  File "/usr/lib/python2.7/json/encoder.py", line 178, in default
    raise TypeError(repr(o) + " is not JSON serializable")
TypeError: <django.forms.fields.EmailField object at 0xb24a066c> is not JSON serializable

谁能告诉我如何避免此错误并在 html 上呈现电子邮件？

4

1 回答 1

0

如果你想要字段的 html，你需要BoundField像这样渲染：

result = {
    'email_field': str(form['email']),
}

它有点不清楚你想在你的 javascript 中做什么。如果您的 html 是 django 模板，则此行将是一个问题：

var form_field = '{{response.email_field}}'

这仅在response传递给模板上下文时才有效。否则，您不能在 javascript 中使用 django 标签。如果您只想获取在 ajax 视图中返回的字段的 html，请执行以下操作：

var form_field = response.email_field;
于 2013-11-12T21:33:19.803 回答