python - 没有这样的列 : chat_conversation. 创建日期

Question

我正在尝试查看我使用 Django 在 Python 3.7 中创建的对话模型。我是 Python、Django 和 Web 应用程序开发新手。我已经完成了 makemigrations 和 migrate 命令，但仍然收到“没有这样的列:chat_conversation.created_date”错误:

Output from running migrations

这是模型.py

from django.db import models
from django.utils import timezone
import uuid

class Conversation(models.Model):#keeps track of conversation id
    id = models.UUIDField(primary_key=True, default=uuid.uuid4)
    created_date = models.DateTimeField(default=timezone.now)

这就是我的views.py

from django.shortcuts import redirect
from django.shortcuts import render
from django.http import HttpResponse
from django.utils import timezone
from .models import Conversation
from django.shortcuts import render, get_object_or_404
from django.http import HttpResponseRedirect

def con_list(request):
    con = Conversation.objects.filter(created_date__lte=timezone.now()).order_by('created_date')
    return render(request, 'chat/con_list.html', {'con': con})

def con_new(request, pk):
    if request.method == "CONVERSATION":
        #form = ConversationForm(request.CONVERSATION)
        if form.is_valid():
            #conversation = form.save(commit=False)
            conversation.created_date = timezone.now()
            conversation.save()
            return redirect('con_list')
    #else:
        #form = ConversationForm()
    return render(request, 'chat/post_list.html' )#{'form': form})

def con_edit(request, pk):
    conversation = get_object_or_404(Conversation, pk=pk)
    if request.method == "CONVERSATION":
        #form = ConversationForm(request.CONVERSATION, instance=conversation)
        if form.is_valid():
            #conversation = form.save(commit=False)
            conversation.created_date = timezone.now()
            conversation.save()
            return redirect('con_list')
    #else:
        #form = ConversationForm(instance=conversation)
    return render(request, 'chat/con_edit.html' )#{'form': form})

我已经评论了一些我想添加回来的部分，但是在我掌握了基础知识之后。这是 url.py

from django.urls import path
from . import views

urlpatterns = [
    path('conversations', views.con_list, name='con_list'),
    path('conversation/new/', views.con_new, name='con_new'),
    path('conversation/<int:pk>/edit/', views.con_edit, name='con_edit'),
]

最后这是我的 con_list.html

{% extends 'chat/base.html' %}

{% block content %}
    {% for conversation in con %}
        <div class="conversation">
            <p><b>{{ conversation.id }}</b> <b>&middot;</b> <i>{{ 
                 conversations.created_date }}</i> <br/></p>
            <a href="{% url 'con_new' %}" >
                <button type="submit" style="background-color:rgb(255, 148, 26); border-radius: 10px">
                <font color="white"><b>New Chat Room</b></font>
                </button>
            </a>
            <a href="{% url 'post_list' %}" >
                <button type="submit" style="background-color:rgb(255, 148, 26); border-radius: 10px">
                <font color="white"><b>{{ conversation.id }}</b></font>
                </button>
            </a>
        <br/><br/><br/>
        <hr style="border-color:orange;" />
        </div>
    {% endfor %}

    {% if user.is_authenticated %}
        Click the button below to logout
        <p><a href="{% url 'logout' %}">logout</a></p>
        {% endif %}
{% endblock %}

Answer 1

您似乎更改了 user 表的名称。

转到“聊天”应用中的 migrations 目录，并在文件中:0005....py 添加 atomic = False 。您应该能够重命名表并最终迁移。