Django形式的参数类型为'；事件'；这是不可容忍的

你好，我正在为运动员设计一个注册系统来注册参加体育比赛。注册页面捕获运动员的所有信息，并将其保存在“运动员”模型的数据库中。然后运动员电子邮件地址（模型中的唯一字段）存储为会话变量，用户被重定向到支付页面。付款页面将从传递到页面的参数中获取事件信息，然后从会话变量中提取运动员的电子邮件地址，并使用该地址获取运动员信息。从那里，它使用运动员和赛事信息查询数据库，以查找成本并将其作为注册费呈现给用户

注册页面似乎一切正常，但是我在从注册页面重定向到付款页面时遇到了一个“类型为“Event”的参数不可编辑”错误

这是“付款”页面的视图

def payment(request, event_year, event_slug):

    event = Event.objects.get(event_date__year = event_year, event_slug = event_slug)

    athlete = Athlete.objects.get(email_address=request.session.get('user_email'))

    if request.method == 'POST':
        form = PaymentForm(data=request.POST)
        if form.is_valid():
            # process form payment data
            form.save()
            return redirect('home')
    else:
        form = PaymentForm(event, athlete)

    return render(request, 'events/event_payment.html', {
        'event': event,
        'athlete': athlete,
        'form': form
    })

付款表格和登记表格都是常规表格，而不是模型表格。这是付款单的模板。应该注意的是，如果{{form}}标记从模板中移除，那么页面呈现时不会出现错误，但是我需要{{form}来处理付款

{% extends "base.html" %}

{% block head %}
    <title>{{ event.event_date.year }} {{ event.event_name }} Payment</title>
{% endblock head %}

{% block content %}

<div class="row-fluid">
  <div class="span12">
    <h2>{{ event.event_date.year }} {{ event.event_name }} Entry Form for {{ athlete.first_name }} {{ athlete.last_name }}</h2>

    <form action="" method="post">
      {% csrf_token %}

      <p>Payment for {{ athlete.first_name }} {{ athlete.last_name }}

      {{ form }}

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

  </div>
</div>

{% endblock content %}

以下是完整的回溯：

Environment:


Request Method: GET
Request URL: http://127.0.0.1:8000/2014/bikini-figure-fitness-physique-championships/payment

Django Version: 1.5.1
Python Version: 2.7.6
Installed Applications:
('django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.sites',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'django.contrib.admin',
 'events')
Installed Middleware:
('django.middleware.common.CommonMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware')


Template error:
In template /home/nse/Development/Django/cbbf/events/templates/events/event_payment.html, error at line 17
   argument of type 'Event' is not iterable
   7 : {% block content %}


   8 : 


   9 :       <!-- Example row of columns -->


   10 :       <div class="row-fluid">


   11 :         <div class="span12">


   12 :           <h2>{{ event.event_date.year }} {{ event.event_name }} Entry Form for {{ athlete.first_name }} {{ athlete.last_name }}</h2>


   13 :           <p></p>


   14 :           <form action="" method="post">


   15 :             {% csrf_token %}


   16 :             <p>Payment for {{ athlete.first_name }} {{ athlete.last_name }}


   17 :              {{ form }} 


   18 :             <button type="submit">Register</button>


   19 :           </form>


   20 :         </div>


   21 :       </div>


   22 : 


   23 : {% endblock content %}


   24 : 

Traceback:
File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py" in get_response
  115.                         response = callback(request, *callback_args, **callback_kwargs)
File "/home/nse/Development/Django/cbbf/events/views.py" in payment
  164.      'form': form
File "/usr/local/lib/python2.7/dist-packages/django/shortcuts/__init__.py" in render
  53.     return HttpResponse(loader.render_to_string(*args, **kwargs),
File "/usr/local/lib/python2.7/dist-packages/django/template/loader.py" in render_to_string
  177.         return t.render(context_instance)
File "/usr/local/lib/python2.7/dist-packages/django/template/base.py" in render
  140.             return self._render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/base.py" in _render
  134.         return self.nodelist.render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/base.py" in render
  830.                 bit = self.render_node(node, context)
File "/usr/local/lib/python2.7/dist-packages/django/template/debug.py" in render_node
  74.             return node.render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/loader_tags.py" in render
  124.         return compiled_parent._render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/base.py" in _render
  134.         return self.nodelist.render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/base.py" in render
  830.                 bit = self.render_node(node, context)
File "/usr/local/lib/python2.7/dist-packages/django/template/debug.py" in render_node
  74.             return node.render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/loader_tags.py" in render
  63.             result = block.nodelist.render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/base.py" in render
  830.                 bit = self.render_node(node, context)
File "/usr/local/lib/python2.7/dist-packages/django/template/debug.py" in render_node
  74.             return node.render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/debug.py" in render
  87.             output = force_text(output)
File "/usr/local/lib/python2.7/dist-packages/django/utils/encoding.py" in force_text
  99.                 s = s.__unicode__()
File "/usr/local/lib/python2.7/dist-packages/django/forms/forms.py" in __str__
  100.         return self.as_table()
File "/usr/local/lib/python2.7/dist-packages/django/forms/forms.py" in as_table
  222.             errors_on_separate_row = False)
File "/usr/local/lib/python2.7/dist-packages/django/forms/forms.py" in _html_output
  145.         top_errors = self.non_field_errors() # Errors that should be displayed above all fields.
File "/usr/local/lib/python2.7/dist-packages/django/forms/forms.py" in non_field_errors
  248.         return self.errors.get(NON_FIELD_ERRORS, self.error_class())
File "/usr/local/lib/python2.7/dist-packages/django/forms/forms.py" in _get_errors
  117.             self.full_clean()
File "/usr/local/lib/python2.7/dist-packages/django/forms/forms.py" in full_clean
  272.         self._clean_fields()
File "/usr/local/lib/python2.7/dist-packages/django/forms/forms.py" in _clean_fields
  281.             value = field.widget.value_from_datadict(self.data, self.files, self.add_prefix(name))
File "/usr/local/lib/python2.7/dist-packages/django/forms/widgets.py" in value_from_datadict
  522.         if name not in data:

Exception Type: TypeError at /2014/bikini-figure-fitness-physique-championships/payment
Exception Value: argument of type 'Event' is not iterable

环境：
请求方法：获取
请求URL:http://127.0.0.1:8000/2014/bikini-图健身健美锦标赛/付款
Django版本：1.5.1
Python版本：2.7.6
已安装的应用程序：
（“django.contrib.auth”，
“django.contrib.contenttypes”，
“django.contrib.sessions”，
“django.contrib.sites”，
“django.contrib.messages”，
“django.contrib.staticfiles”，
“django.contrib.admin”，
"活动")
已安装的中间件：
（'django.middleware.common.CommonMiddleware'，
“django.contrib.sessions.middleware.SessionMiddleware”，
“django.middleware.csrf.CsrfViewMiddleware”，
'django.contrib.auth.middleware.AuthenticationMiddleware'，
'django.contrib.messages.middleware.MessageMiddleware'）
模板错误：
在template/home/nse/Development/Django/cbbf/events/templates/events/events\u payment.html中，第17行出现错误
类型为“Event”的参数不可编辑
7:{%block content%}
8 : 
9 :       
10 :       
11 :         
12:{{event.event_date.year}{{{event.event_name}}{{{atternate.first_name}}{{atternate.last_name}参赛表格
13:

14 :           
15:{%csrf_令牌%}
16:支付{{运动员.名字}{{运动员.姓氏}
17:{{form}
18：登记册
19 :           
20 :         
21 :       
22 : 
23:{%endblock内容%}
24 : 
回溯：
get_响应中的文件“/usr/local/lib/python2.7/dist packages/django/core/handlers/base.py”
115响应=回调（请求，*回调参数，**回调参数）
付款中的文件“/home/nse/Development/Django/cbbf/events/views.py”
164.      '表格：表格
render中的文件“/usr/local/lib/python2.7/dist packages/django/shortcuts/\uuuu init\uuuu.py”
53返回HttpResponse（loader.render_to_string（*args，**kwargs），
render_to_字符串中的文件“/usr/local/lib/python2.7/dist packages/django/template/loader.py”
177.返回t.render（上下文_实例）
render中的文件“/usr/local/lib/python2.7/dist packages/django/template/base.py”
140.返回自渲染（上下文）
文件“/usr/local/lib/python2.7/dist packages/django/template/base.py”
134.返回self.nodelist.render（上下文）
render中的文件“/usr/local/lib/python2.7/dist packages/django/template/base.py”
830.bit=self.render\u节点（节点，上下文）
render_节点中的文件“/usr/local/lib/python2.7/dist packages/django/template/debug.py”
74.返回节点.render（上下文）
render中的文件“/usr/local/lib/python2.7/dist packages/django/template/loader_tags.py”
124.返回编译的\u父对象。\u呈现（上下文）
文件“/usr/local/lib/python2.7/dist packages/django/template/base.py”
134.返回self.nodelist.render（上下文）
render中的文件“/usr/local/lib/python2.7/dist packages/django/template/base.py”
830.bit=self.render\u节点（节点，上下文）
render_节点中的文件“/usr/local/lib/python2.7/dist packages/django/template/debug.py”
74.返回节点.render（上下文）
render中的文件“/usr/local/lib/python2.7/dist packages/django/template/loader_tags.py”
63.result=block.nodelist.render（上下文）
render中的文件“/usr/local/lib/python2.7/dist packages/django/template/base.py”
830.bit=self.render\u节点（节点，上下文）
render_节点中的文件“/usr/local/lib/python2.7/dist packages/django/template/debug.py”
74.返回节点.render（上下文）
render中的文件“/usr/local/lib/python2.7/dist packages/django/template/debug.py”
87.输出=力_文本（输出）
文件“/usr/local/lib/python2.7/dist packages/django/utils/encoding.py”，格式为force_text
99.s=s.\uuuuuuUnicode\uuuuuuu（）
文件“/usr/local/lib/python2.7/dist packages/django/forms/forms.py”位于__
100.返回self.as_table（）
as_表中的文件“/usr/local/lib/python2.7/dist packages/django/forms/forms.py”
222.错误（在单独的行上=错误）
html\u输出中的文件“/usr/local/lib/python2.7/dist packages/django/forms/forms.py”
145top_errors=self.non_field_errors（）#应显示在所有字段上方的错误。
非字段错误中的文件“/usr/local/lib/python2.7/dist packages/django/forms/forms.py”
248返回self.errors.get（非字段错误，self.error\u类（））
文件“/usr/local/lib/python2.7/dist packages/django/forms/forms.py”中的“获取错误”
117self.full_clean（）
文件“/usr/local/lib/python2.7/dist-packages/django/forms/forms.py”的全文
272self._clean_fields（）
文件“/usr/local/lib/python2.7/dist-packages/
Environment:


Request Method: GET
Request URL: http://127.0.0.1:8000/2014/bikini-figure-fitness-physique-championships/payment

Django Version: 1.5.1
Python Version: 2.7.6
Installed Applications:
('django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.sites',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'django.contrib.admin',
 'events')
Installed Middleware:
('django.middleware.common.CommonMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware')


Template error:
In template /home/nse/Development/Django/cbbf/events/templates/events/event_payment.html, error at line 17
   argument of type 'Event' is not iterable
   7 : {% block content %}


   8 : 


   9 :       <!-- Example row of columns -->


   10 :       <div class="row-fluid">


   11 :         <div class="span12">


   12 :           <h2>{{ event.event_date.year }} {{ event.event_name }} Entry Form for {{ athlete.first_name }} {{ athlete.last_name }}</h2>


   13 :           <p></p>


   14 :           <form action="" method="post">


   15 :             {% csrf_token %}


   16 :             <p>Payment for {{ athlete.first_name }} {{ athlete.last_name }}


   17 :              {{ form }} 


   18 :             <button type="submit">Register</button>


   19 :           </form>


   20 :         </div>


   21 :       </div>


   22 : 


   23 : {% endblock content %}


   24 : 

Traceback:
File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py" in get_response
  115.                         response = callback(request, *callback_args, **callback_kwargs)
File "/home/nse/Development/Django/cbbf/events/views.py" in payment
  164.      'form': form
File "/usr/local/lib/python2.7/dist-packages/django/shortcuts/__init__.py" in render
  53.     return HttpResponse(loader.render_to_string(*args, **kwargs),
File "/usr/local/lib/python2.7/dist-packages/django/template/loader.py" in render_to_string
  177.         return t.render(context_instance)
File "/usr/local/lib/python2.7/dist-packages/django/template/base.py" in render
  140.             return self._render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/base.py" in _render
  134.         return self.nodelist.render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/base.py" in render
  830.                 bit = self.render_node(node, context)
File "/usr/local/lib/python2.7/dist-packages/django/template/debug.py" in render_node
  74.             return node.render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/loader_tags.py" in render
  124.         return compiled_parent._render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/base.py" in _render
  134.         return self.nodelist.render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/base.py" in render
  830.                 bit = self.render_node(node, context)
File "/usr/local/lib/python2.7/dist-packages/django/template/debug.py" in render_node
  74.             return node.render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/loader_tags.py" in render
  63.             result = block.nodelist.render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/base.py" in render
  830.                 bit = self.render_node(node, context)
File "/usr/local/lib/python2.7/dist-packages/django/template/debug.py" in render_node
  74.             return node.render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/debug.py" in render
  87.             output = force_text(output)
File "/usr/local/lib/python2.7/dist-packages/django/utils/encoding.py" in force_text
  99.                 s = s.__unicode__()
File "/usr/local/lib/python2.7/dist-packages/django/forms/forms.py" in __str__
  100.         return self.as_table()
File "/usr/local/lib/python2.7/dist-packages/django/forms/forms.py" in as_table
  222.             errors_on_separate_row = False)
File "/usr/local/lib/python2.7/dist-packages/django/forms/forms.py" in _html_output
  145.         top_errors = self.non_field_errors() # Errors that should be displayed above all fields.
File "/usr/local/lib/python2.7/dist-packages/django/forms/forms.py" in non_field_errors
  248.         return self.errors.get(NON_FIELD_ERRORS, self.error_class())
File "/usr/local/lib/python2.7/dist-packages/django/forms/forms.py" in _get_errors
  117.             self.full_clean()
File "/usr/local/lib/python2.7/dist-packages/django/forms/forms.py" in full_clean
  272.         self._clean_fields()
File "/usr/local/lib/python2.7/dist-packages/django/forms/forms.py" in _clean_fields
  281.             value = field.widget.value_from_datadict(self.data, self.files, self.add_prefix(name))
File "/usr/local/lib/python2.7/dist-packages/django/forms/widgets.py" in value_from_datadict
  522.         if name not in data:

Exception Type: TypeError at /2014/bikini-figure-fitness-physique-championships/payment
Exception Value: argument of type 'Event' is not iterable