函数未从python中的视图文件获取类调用
当我从views.py调用该类时,它不会调用该类的函数。我正在调用函数latest\u question\u list=question.get\u poll\u question from views.py,但它不会打印在我的模型函数中 这是我的密码: views.py函数未从python中的视图文件获取类调用,python,django,Python,Django,当我从views.py调用该类时,它不会调用该类的函数。我正在调用函数latest\u question\u list=question.get\u poll\u question from views.py,但它不会打印在我的模型函数中 这是我的密码: views.py from django.shortcuts import render # Create your views here. from django.http import HttpResponse, HttpRespon
from django.shortcuts import render
# Create your views here.
from django.http import HttpResponse, HttpResponseRedirect
from django.template import loader
from .models import Choice, Question
from django.urls import reverse
from django.shortcuts import get_object_or_404, render
def index(request):
latest_question_list = Question.get_poll_question()
context = {'latest_question_list': latest_question_list}
return render(request, 'polls/index.html', context)
def detail(request, question_id):
try:
question = Question.objects.get(pk=question_id)
except Question.DoesNotExist:
raise Http404("Question does not exist")
return render(request, 'polls/detail.html', {'question': question})
def results(request, question_id):
question = get_object_or_404(Question, pk=question_id)
return render(request, 'polls/results.html', {'question': question})
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):
# Redisplay the question voting form.
return render(request, 'polls/detail.html', {
'question': question,
'error_message': "You didn't select a choice.",
})
else:
selected_choice.votes += 1
selected_choice.save()
# Always return an HttpResponseRedirect after successfully dealing
# with POST data. This prevents data from being posted twice if a
# user hits the Back button.
return HttpResponseRedirect(reverse('polls:results', args=(question.id,)))
models.py
import datetime
from django.utils import timezone
from django.db import connection
global cursor
cursor = connection.cursor()
class Question():
print(123)
def get_poll_question():
print(456)
db_table = "polls_question"
cursor.execute('SELECT * FROM '+db_table)
return allquestions
class Choice():
def __str__(self):
db_table = "polls_choice"
cursor.execute("SELECT * FROM "+ db_table+" WHERE question_id = '1' ")
choice_text = cursor.fetchall();
return self.choice_text
您需要将该方法标记为classmethod。也可以使用全局游标 IMO是一个非常糟糕的主意 课堂问题: @类方法 def get_poll_questioncls: 使用connection.cursor作为游标: db_table=民意测验_问题 cursor.executefSELECT*来自{db_table} 返回cursor.fetchall 另一个最好的方法可能是创建一个模型。如果你不
控制表格,您可以在get_poll_question中创建一个,返回所有问题,但您从未在任何地方定义此变量。为什么要编写自己的问题类和原始SQL查询?如果您正在学习Django,请使用Django模型,例如类Questionmodels。模型:。我的问题是为什么我没有打印:456,为什么它没有调用该函数?我尝试了您的代码,但它仍然没有在我的cli控制台中打印456