执行python manage.py migration时请提供帮助，我会收到此错误
跟踪：
（FM）C：\ projects \ AM \ FM \ mysite> python manage.py将操作迁移到 执行：应用所有迁移：管理员，身份验证，内容类型，民意调查， 会话运行迁移：正在应用 polls.0009_auto_20200914_1002 ...回溯（最近一次通话过去）：
文件 “ C：\ projects \ AM \ FM \ lib \ site-packages \ django \ db \ models \ fields_ init _。py”， 第1774行，在get_prep_value中 返回int（value）ValueError：以10为底的int（）的无效文字：'choice'上述异常是以下异常的直接原因：
回溯（最近一次通话最后一次）：文件“ manage.py”，第22行，在 main（）main中的文件“ manage.py”，第18行 execute_from_command_line（sys.argv）文件“ C：\ projects \ AM \ FM \ lib \ site-packages \ django \ core \ management_ init _。py”， 第401行，在execute_from_command_line中 utility.execute（）文件“ C：\ projects \ AM \ FM \ lib \ site-packages \ django \ core \ management_ init _。py”， 执行中的第395行 self.fetch_command（subcommand）.run_from_argv（self.argv）文件“ C：\ projects \ AM \ FM \ lib \ site-packages \ django \ core \ management \ base.py”， 第330行，在run_from_argv中 self.execute（* args，** cmd_options）文件“ C：\ projects \ AM \ FM \ lib \ site-packages \ django \ core \ management \ base.py”， 行371，在执行 输出= self.handle（* args，** options）文件“ C：\ projects \ AM \ FM \ lib \ site-packages \ django \ core \ management \ base.py”， 第85行，包好 res = handle_func（* args，** kwargs）文件“ C：\ projects \ AM \ FM \ lib \ site-packages \ django \ core \ management \ commands \ migrate.py”， 第243行，在手柄中 post_migrate_state = executor.migrate（文件“ C：\ projects \ AM \ FM \ lib \ site-packages \ django \ db \ migrations \ executor.py”， 第117行，正在迁移 状态= self._migrate_all_forwards（状态，计划，完整计划，fake = fake，fake_initial = fake_initial）文件 “ C：\ projects \ AM \ FM \ lib \ site-packages \ django \ db \ migrations \ executor.py”， _migrate_all_forwards中的第147行 状态= self.apply_migration（状态，迁移，fake = fake，fake_initial = fake_initial）文件 “ C：\ projects \ AM \ FM \ lib \ site-packages \ django \ db \ migrations \ executor.py”， 第227行，位于apply_migration中 状态= migration.apply（状态，schema_editor）文件“ C：\ projects \ AM \ FM \ lib \ site-packages \ django \ db \ migrations \ migration.py”， 第124行，适用 operation.database_forwards（self.app_label，schema_editor，old_state，project_state）文件 “ C：\ projects \ AM \ FM \ lib \ site-packages \ django \ db \ migrations \ operations \ fields.py”， 第104行，在database_forwards中 schema_editor.add_field（文件“ C：\ projects \ AM \ FM \ lib \ site-packages \ django \ db \ backends \ sqlite3 \ schema.py”， 第328行，位于add_field中 自我。 remake_table（模型，create_field =字段）文件“ C：\ projects \ AM \ FM \ lib \ site-packages \ django \ db \ backends \ sqlite3 \ schema.py”， 第189行，在 remake_table中 self.effective_default（create_field）文件“ C：\ projects \ AM \ FM \ lib \ site-packages \ django \ db \ backends \ base \ schema.py”， 第303行，有效_默认 返回field.get_db_prep_save（self。 effective_default（field），self.connection）文件 “ C：\ projects \ AM \ FM \ lib \ site-packages \ django \ db \ models \ fields \ related.py”， 第971行，位于get_db_prep_save中 返回self.target_field.get_db_prep_save（value，connection = connection）文件 “ C：\ projects \ AM \ FM \ lib \ site-packages \ django \ db \ models \ fields_ init .py”， 第823行，在get_db_prep_save中 返回self.get_db_prep_value（值，连接=连接，准备=假）文件 “ C：\ projects \ AM \ FM \ lib \ site-packages \ django \ db \ models \ fields_ init .py”， 第2388行，在get_db_prep_value中 值= self.get_prep_value（值）文件“ C：\ projects \ AM \ FM \ lib \ site-packages \ django \ db \ models \ fields_ init .py”， 第1776行，在get_prep_value中 引发e。 class （ValueError：字段'id'需要一个数字但得到了'choice'。
这是modles.py：
from django.db import models
# Create your models here.
class Question(models.Model):
question_text = models.CharField(max_length=200)
pub_date = models.DateTimeField('date published')
class Choice(models.Model):
question = models.ForeignKey(Question, on_delete=models.CASCADE)
choice_text = models.CharField(max_length=200)
votes = models.IntegerField(default=0)
class Questionnaire(models.Model):
questions = models.ManyToManyField("Question", blank=True)
pub_date = models.DateTimeField(help_text='date published', auto_now_add=True)
def __str__(self):
return self.question_text
这是views.py：
from django.shortcuts import render, get_object_or_404
from django.template import loader
# Create your views here.
from django.views import generic
from django.http import Http404
from django.http import HttpResponse ,HttpResponseRedirect
from polls.models import Question ,Choice
from django.urls import reverse
class IndexView(generic.ListView):
template_name = 'polls/index.html'
context_object_name = 'latest_question_list'
def get_queryset(self):
return Question.objects.order_by('-pub_date')[:5]
class DetailView(generic.DetailView):
model = Question
template_name = 'polls/detail.html'
class ResultsView(generic.DetailView):
model = Question
template_name = 'polls/results.html'
def vote(request, question_id):
question = get_object_or_404(Question, pk=question_id)
try:
selected_choice = question.choice_set.get(pk=request.POST['choice'])
except (KeyError, Choice.DoesNotExist):
return render(request, 'polls/detail.html', {'question': question,'error_message': "You didn't select a choice.",})
else:
selected_choice.votes += 1
selected_choice.save()
return HttpResponseRedirect(reverse('polls:results', args=(question.id,)))
这是模板：
detail.html：
> <html lang="en">
>
> <head>
> <meta charset="UTF-8">
> <meta name="viewport" content="width=device-width, initial-scale=1.0">
> <title>Document</title>
> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css"
> integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm"
> crossorigin="anonymous">
>
> </head>
>
> <body>
> <h1>{{ question.question_text }}</h1>
> {% if error_message %}
> <p><strong>{{ error_message }}</strong></p>{% endif %}
> <form action="{% url 'polls:vote' question.id %}" method="post">
> {% csrf_token %} {% for choice in question.choice_set.all %}
> <input type="radio" name="choice" id="choice{{ forloop.counter }}" value="{{choice.id }}">
> <label for="choice{{ forloop.counter }}">{{ choice.choice_text }}</label><br> {% endfor %}
> <input type="submit" value="Vote">
> </form>
> <script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN"
> crossorigin="anonymous"></script>
> <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"
> integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q"
> crossorigin="anonymous"></script>
> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl"
> crossorigin="anonymous"></script> </body>
>
> </html>
index.html：
> <html lang="en">
>
> <head>
> <meta charset="UTF-8">
> <meta name="viewport" content="width=device-width, initial-scale=1.0">
> <title>Document</title>
> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css"
> integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm"
> crossorigin="anonymous">
>
> </head>
>
> <body>
> {% if latest_question_list %}
>
>
>
> <div class="list-group">
> <a href="#" class="list-group-item list-group-item-action active">
> Questions
> </a> {% for question in latest_question_list %}
>
> <a href="{% url 'polls:detail' question.id %}">{{ question.question_text }}</a> {% endfor %}
> </div>
> {% else %}
> <p>No polls are available.</p>
> {% endif %}
> <script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN"
> crossorigin="anonymous"></script>
> <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"
> integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q"
> crossorigin="anonymous"></script>
> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl"
> crossorigin="anonymous"></script> </body>
>
> </html>
results.html：
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
</head>
<body>
<h1>{{ question.question_text }}</h1>
<ul class="list-group list-group-flush">
{% for choice in question.choice_set.all %}
<li class="list-group-item">{{ choice.choice_text }} -- {{ choice.votes }} vote{{ choice.votes|pluralize }}</li>
{% endfor %}
</ul>
<a href="{% url 'polls:detail' question.id %}">Vote again?</a>
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
</body>
</html>