Crispy-formsを持つDjango VariableDoesNotExist

Question

私は約1週間はモーダルにフォームをロードしようとしていましたが、どういうことが間違っているのか分かりません。誰かが私に電子メールを送る単純なフォームです。フォームをモジュール化しようとしましたが、今はそれを直接base.htmlに直接ロードしようとしています。

マイモデル：

from django.db import models 

# Create your models here. 

class EmailMe(models.Model): 
    subject = models.CharField(max_length=63) 
    body = models.TextField(max_length=2047) 
    email = models.EmailField() 

    def __str__(self):#shows object title when called from command line 
     return self.name` 

私形式：

from django import forms 

from crispy_forms.helper import FormHelper 
from crispy_forms.layout import Submit, Layout 

from emailme.models import EmailMe 

class EmailMeForm(forms.ModelForm): 

    subject = forms.CharField(max_length=63) 
    body = forms.CharField(max_length=2047) 
    email = forms.EmailField() 

    class Meta: 
     model = EmailMe 
     fields = '__all__' 

    def __str__(self):#shows object title when called from command line 
     return self.name 

    def __init__(self, *args, **kwargs): 
     super(EmailMeForm, self).__init__(*args, **kwargs) 
     self.helper = FormHelper() 
     self.helper.form_id = 'myModal' 
     self.helper.form_class = 'form-horizontal' 
     self.helper.form_action = 'emailme' 
     self.helper.form_method = 'POST' 
     self.helper.layout = Layout(
      Fields(
       'subject', 
       'body', 
       'email', 
      ), 
      FormActions(
       Submit('submit', 'submit') 
      ) 
     ) 

マイビュー：

from mysite.forms import EmailMeForm 

def home(request): 
    return render_to_response('base.html') 

def emailme(request): 
    if request.POST: 
     form = EmailMeForm(request.POST) 
     if form.is_valid(): 
      return HttpResponseRedirect('home/')#reverse_lazy('home')) 
    else: 
     form = EmailMeForm() 


    ctx = {} 
    ctx.update(csrf(request)) 

    args['form'] = form 
    return render_to_response('emailme_form.html', 
       {'form': form}, 
       context_instance=ctx) 

のURL：

"""mysite URL Configuration 

""" 
from django.conf.urls import url, include 
from django.contrib import admin 

from mysite import views as mysite_views 
from emailme import views as emailme_views 

urlpatterns = [ 
url(r'^admin/', admin.site.urls), 
url(r'^emailme/', emailme_views.emailme, name='emailme'), 
url(r'^home/', mysite_views.home, name='home'), 
] 

base.html：

{% load crispy_forms_tags %} 

<div class="modal-content"> 
     {% csrf_token %} 
     {% crispy form form.helper %} 
</div> 

私はジャンゴ1.9、クリスピー・フォーム、およびブートストラップを使用しています。ここでエラーがある：

Environment: 


Request Method: GET 
Request URL: http://127.0.0.1:8000/home/ 

Django Version: 1.9.8 
Python Version: 3.5.2 
Installed Applications: 
['django.contrib.admin', 
'django.contrib.auth', 
'django.contrib.contenttypes', 
'django.contrib.sessions', 
'django.contrib.messages', 
'django.contrib.staticfiles', 
    'emailme', 
    'crispy_forms', 
'bootstrap3'] 
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.auth.middleware.SessionAuthenticationMiddleware', 
'django.contrib.messages.middleware.MessageMiddleware', 
'django.middleware.clickjacking.XFrameOptionsMiddleware'] 


Template error: 
In template /home/pi/Django-bootstrap/bin/mysite/templates/base.html, error at line 77 
    Failed lookup for key [%s] in %r 67 :  
    68 :  
69 :  
70 : <div class="container"> 
71 : <!-- Modal --> 
72 : <div class="modal fade" id="myModal" role="dialog"> 
73 : <div class="modal-dialog"> 





74 : <!-- Modal content--> 
75 :  <div class="modal-content"> 
76 :  {% csrf_token %} 
77 :  {% crispy form form.helper %} 
78 :  </div> 
79 : </div> 
80 : </div> 
81 : </div> 
82 : 
83 : 
84 : 
85 :  <div class="container"> 
86 :  <!-- Example row of columns --> 
87 :  <div class="row"> 


Traceback: 

File "/home/pi/Django-bootstrap/lib/python3.5/site-packages/django/template/base.py" in _resolve_lookup 
883.      current = current[bit] 

File "/home/pi/Django-bootstrap/lib/python3.5/site-packages/django/template/context.py" in __getitem__ 
77.   raise KeyError(key) 

During handling of the above exception ('form'), another exception occurred: 

File "/home/pi/Django-bootstrap/lib/python3.5/site-packages/django/template/base.py" in _resolve_lookup 
889.       if isinstance(current, BaseContext) and getattr(type(current), bit): 

During handling of the above exception (type object 'Context' has no attribute 'form'), another exception occurred: 

File "/home/pi/Django-bootstrap/lib/python3.5/site-packages/django/template/base.py" in _resolve_lookup 
898.        current = current[int(bit)] 

During handling of the above exception (invalid literal for int() with base 10: 'form'), another exception occurred: 

File "/home/pi/Django-bootstrap/lib/python3.5/site-packages/django/core/handlers/base.py" in get_response 
149.      response = self.process_exception_by_middleware(e, request) 

File "/home/pi/Django-bootstrap/lib/python3.5/site-packages/django/core/handlers/base.py" in get_response 
147.      response = wrapped_callback(request, *callback_args, **callback_kwargs) 

File "/home/pi/Django-bootstrap/bin/mysite/mysite/views.py" in home 
13.  return render_to_response('base.html') 

File "/home/pi/Django-bootstrap/lib/python3.5/site-packages/django/shortcuts.py" in render_to_response 
39.   content = loader.render_to_string(template_name, context, using=using) 

File "/home/pi/Django-bootstrap/lib/python3.5/site-packages/django/template/loader.py" in render_to_string 
97.   return template.render(context, request) 

File "/home/pi/Django-bootstrap/lib/python3.5/site-packages/django/template/backends/django.py" in render 
95.    return self.template.render(context) 

File "/home/pi/Django-bootstrap/lib/python3.5/site-packages/django/template/base.py" in render 
206.      return self._render(context) 

File "/home/pi/Django-bootstrap/lib/python3.5/site-packages/django/template/base.py" in _render 
197.   return self.nodelist.render(context) 

File "/home/pi/Django-bootstrap/lib/python3.5/site-packages/django/template/base.py" in render 
992.     bit = node.render_annotated(context) 

File "/home/pi/Django-bootstrap/lib/python3.5/site-packages/django/template/base.py" in render_annotated 
959.    return self.render(context) 

File "/home/pi/Django-bootstrap/lib/python3.5/site-packages/crispy_forms/templatetags/crispy_forms_tags.py" in render 
214.   c = self.get_render(context) 

File "/home/pi/Django-bootstrap/lib/python3.5/site-packages/crispy_forms/templatetags/crispy_forms_tags.py" in get_render 
107.   actual_form = form.resolve(context) 

File "/home/pi/Django-bootstrap/lib/python3.5/site-packages/django/template/base.py" in resolve 
850.    value = self._resolve_lookup(context) 

File "/home/pi/Django-bootstrap/lib/python3.5/site-packages/django/template/base.py" in _resolve_lookup 
905.              (bit, current)) # missing attribute 

Exception Type: VariableDoesNotExist at /home/ 
Exception Value: Failed lookup for key [form] in "[{'False': False, 'None': None, 'True': True}]" 

Answer 1

問題は、あなたがあなたのbase.html（のためのすべてのビュー）でformを使用しようとしているということです。ただし、フォームはemailmeビューのコンテキストにのみ追加されます。ホームページビュー（home）はformを提供しないため、ホームページをロードしようとするとエラーが発生します。

def home(request): 
    return render_to_response('base.html', {'form': EmailMeForm()}) 

またはグローバルテンプレートのコンテキストににフォームを挿入するためにcontext processorを使用します。

あなたはどちらかは、ホームページビュー（とbase.htmlを使用し、他のビュー）にフォームを追加する必要があります。