Question

我正在尝试将Backbone.js模型作为POST发送到Piston并且收到错误：

Piston / 0.2.2（Django 1.3）崩溃报告：

Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/piston/handler.py",
    line 81, in create inst = self.model.objects.get(**attrs)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/manager.py",
    line 132, in get return self.get_query_set().get(*args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/query.py",
    line 341, in get clone = self.filter(*args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/query.py",
    line 550, in filter return self._filter_or_exclude(False, *args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/query.py",
    line 568, in _filter_or_exclude clone.query.add_q(Q(*args, **kwargs))
File "/usr/local/lib/python2.7/dist-packages/django/db/models/sql/query.py",
    line 1172, in add_q can_reuse=used_aliases, force_having=force_having)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/sql/query.py",
    line 1060, in add_filter negate=negate, process_extras=process_extras)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/sql/query.py",
    line 1238, in setup_joins "Choices are: %s" % (name, ", ".join(names)))
FieldError: Cannot resolve keyword 'model' into field.
    Choices are: calendar, date, id, name, priority

代码：

$(function() {
Backbone.emulateJSON = true;
$('form').submit(function() {

    formdict = jsonform($("form#add_task :input"));


   var new_task = new Task({
    calendar: formdict.calendar,
    date: formdict.date,
    name: formdict.name,
    priority: formdict.priority});
    console.log("new _task: " + new_task);
     new_task.save();


    return false;
});

});

});

回复和请求信息：

Request URL:http://localhost:8000/api/task/
Request Method:POST
Status Code:500 INTERNAL SERVER ERROR
Request Headersview source
Accept:application/json, text/javascript, */*; q=0.01
Accept-Charset:ISO-8859-1,utf-8;q=0.7,*;q=0.3
Accept-Encoding:gzip,deflate,sdch
Accept-Language:en-US,en;q=0.8
Cache-Control:no-cache
Connection:keep-alive
Content-Length:156
Content-Type:application/x-www-form-urlencoded
X-Requested-With:XMLHttpRequest
Form Dataview URL encoded
model:{"date":"2012-03-10T01:12:43.876Z","name":"New event","priority":0,"id":1,"calendar":"null"}

响应标题查看源

Access-Control-Allow-Headers:Origin,Content-Type,Accept
Access-Control-Allow-Methods:POST,GET,OPTIONS,PUT,DELETE
Access-Control-Allow-Origin:*
Content-Type:text/html; charset=utf-8
Date:Sat, 10 Mar 2012 01:12:44 GMT
Server:WSGIServer/0.1 Python/2.7.2+
Vary:Authorization

如何让活塞接受该模型？

Answer 1

您的错误代码显示：

FieldError: Cannot resolve keyword 'model' into field.
   Choices are: calendar, date, id, name, priority

显然您发送错误的POST数据。打开调试控制台并检查save（）函数发布的内容，看看是否匹配Piston所期望的内容。您可以在firebug / chrome控制台的网络选项卡中查看POST网址和参数。

Answer 2

很明显你发了

{model:{"date":"2012-03-10T01:12:43.876Z","name":"New event","priority":0,"id":1,"calendar":"null"}}

而您的服务器端期望：

{“date”：“2012-03-10T01：12：43.876Z”，“name”：“新事件”，“优先级”：0，“id”：1，“calendar”：“null”}

因此，您要么将Backbone的sync()更改为在JSON或服务器端不包含model。我不使用Django，只是简单地看https://bitbucket.org/jespern/django-piston/wiki/Documentation#!working-with-models给我的印象就是：它很简单：

class ModelHandler(BaseHandler):
   fields = (('model', ('id', 'name', 'date', 'priority', 'calendar'),))

无法将关键字“模型”解析为字段。活塞与Backbone.js

2 个答案: