我正在尝试在表单中实现django_select2，但是当我尝试呈现页面时，出现以下错误：
type object 'Select2Widget' has no attribute 'attrs'
小部件是这样声明的(它是一个模型形式(：
self.fields["prodotti_var"].widget = Select2Widget
以下是完整的回溯：
Environment:
Request Method: GET
Request URL: http://127.0.0.1:8000/magazzino/bolle_in/5/
Django Version: 2.0.6
Python Version: 3.6.5
Installed Applications:
['django_select2',
'actstream',
'amministrazione',
'clienti',
'fornitori',
'prodotti',
'documenti',
'fatture',
'admin_interface',
'colorfield',
'magazzino',
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'django.contrib.sites',
'django.contrib.humanize',
'widget_tweaks']
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/matteo/Naturelab/amministrazione/templates/base_site.html, error at line 0
type object 'Select2Widget' has no attribute 'attrs'
1 : {% load static %}
2 : {% load widget_tweaks %}
3 : <!DOCTYPE html>
4 : <!--
5 : Template Name: LuMa CMS
6 : Version: 1.0
7 : Author: LucyT & MatFire1999
8 : Contact: hello@lumacms.com
9 : -->
10 : <html lang="it">
Traceback:
File "/home/matteo/virtualenvs/Naturelab/lib/python3.6/site-packages/django/core/handlers/exception.py" in inner
35. response = get_response(request)
File "/home/matteo/virtualenvs/Naturelab/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
128. response = self.process_exception_by_middleware(e, request)
File "/home/matteo/virtualenvs/Naturelab/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
126. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/home/matteo/Naturelab/magazzino/views.py" in ddt_in_detail
76. return render(request, "ddt_in_mod.html", context)
File "/home/matteo/virtualenvs/Naturelab/lib/python3.6/site-packages/django/shortcuts.py" in render
36. content = loader.render_to_string(template_name, context, request, using=using)
File "/home/matteo/virtualenvs/Naturelab/lib/python3.6/site-packages/django/template/loader.py" in render_to_string
62. return template.render(context, request)
File "/home/matteo/virtualenvs/Naturelab/lib/python3.6/site-packages/django/template/backends/django.py" in render
61. return self.template.render(context)
File "/home/matteo/virtualenvs/Naturelab/lib/python3.6/site-packages/django/template/base.py" in render
175. return self._render(context)
File "/home/matteo/virtualenvs/Naturelab/lib/python3.6/site-packages/django/template/base.py" in _render
167. return self.nodelist.render(context)
File "/home/matteo/virtualenvs/Naturelab/lib/python3.6/site-packages/django/template/base.py" in render
943. bit = node.render_annotated(context)
File "/home/matteo/virtualenvs/Naturelab/lib/python3.6/site-packages/django/template/base.py" in render_annotated
910. return self.render(context)
File "/home/matteo/virtualenvs/Naturelab/lib/python3.6/site-packages/django/template/loader_tags.py" in render
155. return compiled_parent._render(context)
File "/home/matteo/virtualenvs/Naturelab/lib/python3.6/site-packages/django/template/base.py" in _render
167. return self.nodelist.render(context)
File "/home/matteo/virtualenvs/Naturelab/lib/python3.6/site-packages/django/template/base.py" in render
943. bit = node.render_annotated(context)
File "/home/matteo/virtualenvs/Naturelab/lib/python3.6/site-packages/django/template/base.py" in render_annotated
910. return self.render(context)
File "/home/matteo/virtualenvs/Naturelab/lib/python3.6/site-packages/django/template/loader_tags.py" in render
67. result = block.nodelist.render(context)
File "/home/matteo/virtualenvs/Naturelab/lib/python3.6/site-packages/django/template/base.py" in render
943. bit = node.render_annotated(context)
File "/home/matteo/virtualenvs/Naturelab/lib/python3.6/site-packages/django/template/base.py" in render_annotated
910. return self.render(context)
File "/home/matteo/virtualenvs/Naturelab/lib/python3.6/site-packages/django/template/defaulttags.py" in render
211. nodelist.append(node.render_annotated(context))
File "/home/matteo/virtualenvs/Naturelab/lib/python3.6/site-packages/django/template/base.py" in render_annotated
910. return self.render(context)
File "/home/matteo/virtualenvs/Naturelab/lib/python3.6/site-packages/widget_tweaks/templatetags/widget_tweaks.py" in render
197. return str(bounded_field)
File "/home/matteo/virtualenvs/Naturelab/lib/python3.6/site-packages/django/utils/html.py" in <lambda>
380. klass.__str__ = lambda self: mark_safe(klass_str(self))
File "/home/matteo/virtualenvs/Naturelab/lib/python3.6/site-packages/django/forms/boundfield.py" in __str__
36. return self.as_widget()
File "/home/matteo/virtualenvs/Naturelab/lib/python3.6/site-packages/widget_tweaks/templatetags/widget_tweaks.py" in as_widget
30. process(widget or self.field.widget, attrs, attribute, value)
File "/home/matteo/virtualenvs/Naturelab/lib/python3.6/site-packages/widget_tweaks/templatetags/widget_tweaks.py" in process
63. elif widget.attrs.get(attribute):
Exception Type: AttributeError at /magazzino/bolle_in/5/
Exception Value: type object 'Select2Widget' has no attribute 'attrs'
你们能帮我吗？
通过编写：
self.fields["prodotti_var"].widget = Select2Widget
您没有构造小部件，而是将对Select2Widget类的引用传递到self.fields中。
您需要调用构造函数，因此：
self.fields["prodotti_var"].widget = Select2Widget()