Django Tables2を動作させるには

Question

django_tables2を動作させようとしていますが、エラーが発生しています。私はすでにそれをインストールして、それはすでに私の設定になっています。

models.py

class Schedules(models.Model): 
    course_name = models.CharField(max_length=128, choices=COURSE_NAME_CHOICES, default='a-plus') 
    location = models.CharField(max_length=128, choices=LOCATION_CHOICES, default='south_plainfield') 
    room = models.CharField(max_length=128, choices=ROOM_CHOICES, default='A') 
    start_date = models.DateField(auto_now=False, auto_now_add=False, default=datetime.date.today) 
    start_time = models.CharField(max_length=128, choices=START_TIME_CHOICES, default='eight-thirty am') 
    end_time = models.CharField(max_length=128, choices=END_TIME_CHOICES, default='eight-thirty am') 
    instructor = models.CharField(max_length=128, choices=INSTRUCTOR_CHOICES, default='adewale') 
    total_hours = models.CharField(max_length=128, choices=TOTAL_HOURS_CHOICES, default='six') 
    hours_per_class = models.CharField(max_length=128, choices=HOURS_PER_CLASS_CHOICES, default='four_and_half') 
    frequency = models.CharField(max_length=128) 
    status = models.CharField(max_length=128, choices=STATUS_CHOICES) 
    interval = models.CharField(max_length=128, choices=INTERVAL_CHOICES, default='1 day') 
    initiated_by = models.CharField(max_length=128, null=True) 
    schedule_id = models.IntegerField(default=0) 

    def save(self, flag=True, *args, **kwargs): 
     super(Schedules, self).save() 
     if flag: 
      self.schedule_id = self.id + 10000 
      self.save(flag=False, *args, **kwargs) 

tables.py

import django_tables2 as tables 
from schedule.models import Schedules 

class ScheduleTable(tables.Table): 
    class Meta: 
     model = Schedules 

views.py

from schedule.models import Schedules 
from schedule.tables import ScheduleTable 

def search_Schedule(request): 
    context_dict = {} 
    if request.method == 'POST': 
     query = request.POST['course_name_search'] 
     results = Schedules.objects.filter(course_name=query) 
     table = ScheduleTable(results) 
     if query: 
      context_dict['table'] = table 
     else: 
      context_dict['no_results'] = query 
    return render(request, "schedule/search_schedule.html", context_dict) 

search_schedule.html

{% extends 'base.html' %} 

{% load django_tables2 %} 

{% block main_content %} 
<form method="post" action=""> 
    {% csrf_token %} 
    <label for="course_name_search">Course Name:</label> 
    <input type="text" name="course_name_search" id="course_name_search"> 
    <input type="submit" name="submit"> 
</form> 
<div id="result_panel"> 
    {% if no_results %} 
     No results returned for <q>{{ no_results }}</q> 
    {% else %} 
     {% render_table table %} 
    {% endif %} 
</div> 
{% endblock %} 

私は 'ValueError at/schedule/search_schedule /：期待されるテーブルまたはクエリセットではなく、strです。私は手紙の手順を踏んだと確信しています。私は間違って何をしていますか？

編集：ここではトレースバックです：GET要求については

Environment: 


Request Method: GET 
Request URL: http://127.0.0.1:8000/schedule/search_schedule/ 

Django Version: 1.10 
Python Version: 3.6.1 
Installed Applications: 
['django.contrib.admin', 
'django.contrib.auth', 
'django.contrib.contenttypes', 
'django.contrib.sessions', 
'django.contrib.messages', 
'django.contrib.staticfiles', 
'registration', 
'django_countries', 
'localflavor', 
'django_tables2', 
'avtechpassport', 
'students', 
'billing', 
'timesheet', 
'wai_wdp', 
'jobs', 
'schedule'] 
Installed Middleware: 
['django.middleware.security.SecurityMiddleware', 
'django.contrib.sessions.middleware.SessionMiddleware', 
'django.middleware.common.CommonMiddleware', 
'django.middleware.csrf.CsrfViewMiddleware', 
'django.contrib.auth.middleware.AuthenticationMiddleware', 
'django.contrib.messages.middleware.MessageMiddleware', 
'django.middleware.clickjacking.XFrameOptionsMiddleware'] 


Template error: 
In template /home/jerry22/PycharmProjects/avtechpassport_proj1/templates/schedule/search_schedule.html, error at line 38 
    Expected table or queryset, not str 28 :  <form method="post" action=""> 
    29 :   {% csrf_token %} 
    30 :   <label for="course_name_search">Course Name:</label> 
    31 :   <input type="text" name="course_name_search" id="course_name_search"> 
    32 :   <input type="submit" name="submit"> 
    33 :  </form> 
    34 :  <div id="result_panel"> 
    35 :   {% if no_results %} 
    36 :    No results returned for <q>{{ no_results }}</q> 
    37 :   {% else %} 
    38 :    {% render_table table %} 
    39 :   {% endif %} 
    40 :  </div> 
    41 : {% endblock %} 

Traceback: 

File "/home/jerry22/.virtualenvs/jerry_avtechpassport_project/lib/python3.6/site-packages/django/core/handlers/exception.py" in inner 
    39.    response = get_response(request) 

File "/home/jerry22/.virtualenvs/jerry_avtechpassport_project/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response 
    187.     response = self.process_exception_by_middleware(e, request) 

File "/home/jerry22/.virtualenvs/jerry_avtechpassport_project/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response 
    185.     response = wrapped_callback(request, *callback_args, **callback_kwargs) 

File "/home/jerry22/PycharmProjects/avtechpassport_proj1/schedule/views.py" in search_Schedule 
    81.  return render(request, "schedule/search_schedule.html", context_dict) 

File "/home/jerry22/.virtualenvs/jerry_avtechpassport_project/lib/python3.6/site-packages/django/shortcuts.py" in render 
    30.  content = loader.render_to_string(template_name, context, request, using=using) 

File "/home/jerry22/.virtualenvs/jerry_avtechpassport_project/lib/python3.6/site-packages/django/template/loader.py" in render_to_string 
    68.  return template.render(context, request) 

File "/home/jerry22/.virtualenvs/jerry_avtechpassport_project/lib/python3.6/site-packages/django/template/backends/django.py" in render 
    66.    return self.template.render(context) 

File "/home/jerry22/.virtualenvs/jerry_avtechpassport_project/lib/python3.6/site-packages/django/template/base.py" in render 
    208.      return self._render(context) 

File "/home/jerry22/.virtualenvs/jerry_avtechpassport_project/lib/python3.6/site-packages/django/template/base.py" in _render 
    199.   return self.nodelist.render(context) 

File "/home/jerry22/.virtualenvs/jerry_avtechpassport_project/lib/python3.6/site-packages/django/template/base.py" in render 
    994.     bit = node.render_annotated(context) 

File "/home/jerry22/.virtualenvs/jerry_avtechpassport_project/lib/python3.6/site-packages/django/template/base.py" in render_annotated 
    961.    return self.render(context) 

File "/home/jerry22/.virtualenvs/jerry_avtechpassport_project/lib/python3.6/site-packages/django/template/loader_tags.py" in render 
    174.   return compiled_parent._render(context) 

File "/home/jerry22/.virtualenvs/jerry_avtechpassport_project/lib/python3.6/site-packages/django/template/base.py" in _render 
    199.   return self.nodelist.render(context) 

File "/home/jerry22/.virtualenvs/jerry_avtechpassport_project/lib/python3.6/site-packages/django/template/base.py" in render 
    994.     bit = node.render_annotated(context) 

File "/home/jerry22/.virtualenvs/jerry_avtechpassport_project/lib/python3.6/site-packages/django/template/base.py" in render_annotated 
    961.    return self.render(context) 

File "/home/jerry22/.virtualenvs/jerry_avtechpassport_project/lib/python3.6/site-packages/django/template/loader_tags.py" in render 
    70.     result = block.nodelist.render(context) 

File "/home/jerry22/.virtualenvs/jerry_avtechpassport_project/lib/python3.6/site-packages/django/template/base.py" in render 
    994.     bit = node.render_annotated(context) 

File "/home/jerry22/.virtualenvs/jerry_avtechpassport_project/lib/python3.6/site-packages/django/template/base.py" in render_annotated 
    961.    return self.render(context) 

File "/home/jerry22/.virtualenvs/jerry_avtechpassport_project/lib/python3.6/site-packages/django/template/defaulttags.py" in render 
    323.     return nodelist.render(context) 

File "/home/jerry22/.virtualenvs/jerry_avtechpassport_project/lib/python3.6/site-packages/django/template/base.py" in render 
    994.     bit = node.render_annotated(context) 

File "/home/jerry22/.virtualenvs/jerry_avtechpassport_project/lib/python3.6/site-packages/django/template/base.py" in render_annotated 
    961.    return self.render(context) 

File "/home/jerry22/.virtualenvs/jerry_avtechpassport_project/lib/python3.6/site-packages/django_tables2/templatetags/django_tables2.py" in render 
    132.    raise ValueError('Expected table or queryset, not {}'.format(klass)) 

Exception Type: ValueError at /schedule/search_schedule/ 
    Exception Value: Expected table or queryset, not str 

Answer 1

Djangoは{% else %}ブロック内に存在しないテーブルをレンダリングしようとするので、{% if no_results %}は、Falseに評価されます。

代わりにこのようなことを行うことができます。

{% if table %} 
    {% render_table table %} 
{% else %} 
    {% if no_results %} 
     No results returned for <q>{{ no_results }}</q> 
    {% else %} 
     Please enter a search 
    {% endif %} 
{% endif %}