Django读取条目的时候提示Exception Value: no such column: learning_logs_entry.date_added

问题遇到的现象和发生背景
这是h5页面代码
{% extends 'learning_logs/base.html' %}
{% block content %}
<p>Topic:{{ topic }}</p>
<p>Entries:</p>
<ul>
  {% for entry in entries %}
  <li>
    <p>{{ entry.date_added|date:'M d, Y H:i' }}</p>
    <p>{{ entry.text|linebreaks }}</p>
  </li>
  {% empty %}
  <li>There are no entries for this topic yet</li>
  {% endfor %}

</ul>
{% endblock content %}


这是view配置
from django.shortcuts import render
from .models import Topic

# 在这里创建视图

def index(request):
    """学习笔记主页"""
    return render(request,'learning_logs/index.html')

def topics(request):
    """显示所有主题"""
    topics = Topic.objects.order_by('date_added')
    context = {'topics':topics}
    return render(request,'learning_logs/topics.html',context)

def topic(request,topic_id):
    """显示主题对于的条目"""
    topic = Topic.objects.get(id=topic_id)
    entries = topic.entry_set.order_by('-date_added')
    context = {'topic':topic,'entries':entries}
    return render(request,'learning_logs/topic.html',context)

这是模型
from django.db import models
#在这里创建模型
class Topic(models.Model):
    """用户学习的主题"""
    text = models.CharField(max_length=200)
    date_added = models.DateTimeField(auto_now_add=True)

    def __str__(self):
        """返回模型字符串的表示"""
        return self.text

class Entry(models.Model):
    topic = models.ForeignKey(Topic,on_delete=models.CASCADE)
    text = models.TextField()
    date_added = models.DateTimeField(auto_now_add=True)

    class Mate:
        verbose_name_plural = 'entries'

    def __str__(self):

        if (len(self.text)) > 50:
            return f"{self.text[:50]}..."
        else:
            return self.text

这是urls
from django.urls import path,re_path
from . import views

app_name = 'learning_logs'

urlpatterns=[
    # 主页面
    path('',views.index,name='index'),
    #显示所有主题的页面
    path('topics/',views.topics,name='topics'),
    #特定主题的详情页面
    path('topics/<int:topic_id>/',views.topic,name='topic')
]

运行结果及报错内容

Django Version: 4.0.2
Exception Type: OperationalError
Exception Value: no such column: learning_logs_entry.date_added

有没有什么解决办法

no such column是没有这个列,应该是你数据读取方式错了,在视图函数确认一下有没有entry.date_added这个数据

topic = Topic.objects.get(id=topic_id)

entries = topic.entry_set.order_by('-date_added')

我建议你打印一下这两个变量,看看取值是不是符合你得要求

应该是你之前修改了entry里的东西,但没有迁移到数据库中

请问你这个问题解决了吗,我遇到了类似的问题,我为每个topic都添加了entry,但是页面仍然显示There are no entries for this topic yet