python

Question

我正在学习django，我真的无法解决这个错误，我尝试修改每个文件，但我找不到问题所在。

错误： /topics/ 处的操作错误没有这样的 table: pizzas_topic

我不得不提一下，这个练习来自 Python 速成班第 2 版

谢谢

这是我项目中的代码：

base.html:

<p>
    <a href="{% url 'pizzas:index' %}">Pizzeria</a> -
    <a href="{% url 'pizzas:topics' %}">Pizzas</a>
</p>


{% block content %}{% endblock content %}

index.html

{% extends "pizzas/base.html"%}

{% block content %}
<p>Pizzeria</p>
<p>Hi</p>
{% endblock content%}

topic.html

{% extends 'pizzas/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 %}

topics.html

{% extends "pizzas/base.html" %}

{% block content %}

    <p> Topics</p>
<ul>
    {% for topic in topics %}
    <li>
        <a href="{% url 'pizzas:topic' topic.id %}">{{ topic }}</a>
    </li>
    {% empty %}
    <li>No topics have been addet yet.</li>
    {% endfor %}
</ul>

{% endblock content %}

urls.py

"""Defines URL patterns for pizzeria."""

from django.urls import path

from . import views

app_name = 'pizzas'
urlpatterns = [
    # Home page
    path('',views.index, name='index'),
    # Page that shows all pizzas.
    path('topics/', views.topics, name='topics'),
    # Detail page for a single topic.
    path('topics/<int:topic_id>/', views.topic, name='topic'),
]

views.py

from django.shortcuts import render

from .models import Topic

def index(request):
    """The home page for Learning Log."""
    return render(request, 'pizzas/index.html')

def topics(request):
    """Show all topics."""
    topics = Topic.objects.order_by('date_added')
    context = {'topics': topics}
    return render(request,'pizzas/topics.html',context)

def topic(request, topic_id):
    """Show a single topic and all its entries."""
    topic = Topic.objects.get(id=topic_id)
    entries = topic.entry_set.order_by('-date_added')
    context = {'topic': topic, 'entries': entries}
    return render(request, 'pizzas/topic.html', context)

Answer 1

运行:

python manage.py migrate
python manage.py makemigrations
python manage.py migrate

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