從Django中的User模型創建用戶名列表

Question

我正在嘗試為我的multiselectfield創建用戶列表。

class Question(models.Model):
        question_text = models.CharField(max_length=200)
        pub_date = models.DateTimeField('date published')
        users = User.objects.values_list('id','username')
        authorized = MultiSelectField(choices=users, null=True)

但是問題是，稍后在我的html文件中，我無法將這些值與登錄的用戶ID進行比較

{% if latest_question_list %}
  <ul>
  {% for question in latest_question_list %}
        {% for person in question.authorized %}
            {% ifequal person request.user.id %}
            <li><a href="/polls/{{ question.id }}/">{{ question.question_text }}</a></li>
            {% endifequal %}
        {% endfor %}
        </ul>
  {% endfor %}

提前致謝

編輯：這是我在使用only（）而不是values_list（）之后的回溯調用：

Traceback (most recent call last):
  File "/home/ab/.local/lib/python3.6/site-packages/django/utils/autoreload.py", line 225, in wrapper
    fn(*args, **kwargs)
  File "/home/ab/.local/lib/python3.6/site-packages/django/core/management/commands/runserver.py", line 112, in inner_run
    autoreload.raise_last_exception()
  File "/home/ab/.local/lib/python3.6/site-packages/django/utils/autoreload.py", line 248, in raise_last_exception
    raise _exception[1]
  File "/home/ab/.local/lib/python3.6/site-packages/django/core/management/__init__.py", line 327, in execute
    autoreload.check_errors(django.setup)()
  File "/home/ab/.local/lib/python3.6/site-packages/django/utils/autoreload.py", line 225, in wrapper
    fn(*args, **kwargs)
  File "/home/ab/.local/lib/python3.6/site-packages/django/__init__.py", line 24, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "/home/ab/.local/lib/python3.6/site-packages/django/apps/registry.py", line 112, in populate
    app_config.import_models()
  File "/home/ab/.local/lib/python3.6/site-packages/django/apps/config.py", line 198, in import_models
    self.models_module = import_module(models_module_name)
  File "/usr/lib/python3.6/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 994, in _gcd_import
  File "<frozen importlib._bootstrap>", line 971, in _find_and_load
  File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 665, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/ab/Documents/szkieletowe/projectmaster/DjangoPollsApp/PollsApp/polls/models.py", line 8, in <module>
    class Question(models.Model):
  File "/home/ab/Documents/szkieletowe/projectmaster/DjangoPollsApp/PollsApp/polls/models.py", line 12, in Question
    authorized = MultiSelectField(choices=users, null=True)
  File "/home/ab/.local/lib/python3.6/site-packages/multiselectfield/db/fields.py", line 69, in __init__
    self.max_length = get_max_length(self.choices, self.max_length)
  File "/home/ab/.local/lib/python3.6/site-packages/multiselectfield/utils.py", line 31, in get_max_length
    return len(','.join([string_type(key) for key, label in choices]))
  File "/home/ab/.local/lib/python3.6/site-packages/multiselectfield/utils.py", line 31, in <listcomp>
    return len(','.join([string_type(key) for key, label in choices]))
TypeError: 'User' object is not iterable

和我的views.py：

class VotesView(generic.ListView):
    template_name = 'polls/votes.html'
    model = Question
    context_object_name = 'latest_question_list'

Answer 1

class Question(models.Model):
        question_text = models.CharField(max_length=200)
        pub_date = models.DateTimeField('date published')
        users = User.objects.values_list('id','username')
        authorized = MultiSelectField(choices=users, null=True)

編輯

我only再次更改為values_list ，我明白了您正在填充所有用戶ID和用戶名並將其存儲為元組以做出選擇列表。

現在在您的模板中，您應該這樣做

{% if latest_question_list %}
  <ul>
  {% for question in latest_question_list %}
        {% for person in question.authorized %}
            {% ifequal person request.user.username %}
            <li><a href="/polls/{{ question.id }}/">{{ question.question_text }}</a></li>
            {% endifequal %}
        {% endfor %}
        </ul>
  {% endfor %}