Question

您好我正在进行djangogirls教程并且遇到了OperationalError没有这样的表：blog_post。这在我的虚拟环境中工作得很好，但在推送到heroku之后我得到了OperationalError。

我正在使用Django 1.7.7。有关错误的更多信息，请访问：https://girlsblog.herokuapp.com/

我做到了 python manage.py makemigrations python manage.py migrate 最初在本教程的开头。然后我尝试再次执行此操作，并且“未检测到任何更改”和“无需迁移”

这是我的post_list.html

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

{% block content %}
    {% for post in posts %}
        <div class="post">
            <div class="date">
                {{ post.published.date }}
            </div>
            <h1><a href="{% url 'blog.views.post_detail' pk=post.pk %}">{{ post.title }}</a></h1>
            <p> {{ post.text|linebreaks }}</p>
        </div>
    {% endfor %}
{% endblock content %}

这是我的.gitignore

myvenv
__pycache__
staticfiles
local_settings.py
db.sqlite3

Models.py

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

# Create your models here.

class Post(models.Model):
    author = models.ForeignKey('auth.User')
    title = models.CharField(max_length=200)
    text = models.TextField()
    created_date = models.DateTimeField(
            default=timezone.now)
    published_date = models.DateTimeField(
            blank=True, null=True)

    def publish(self):
        self.published_date = timezone.now()
        self.save()

    def __str__(self):
        return self.title

Settings.py

"""
Django settings for mysite project.

For more information on this file, see
https://docs.djangoproject.com/en/1.7/topics/settings/

For the full list of settings and their values, see
https://docs.djangoproject.com/en/1.7/ref/settings/
"""

# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
import os
BASE_DIR = os.path.dirname(os.path.dirname(__file__))


# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/1.7/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = '1l8)#&q8r_wwev1r9mm8q5ezz8p#)rvg(l4%(t^-t8s4bva2+r'

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True

TEMPLATE_DEBUG = True

ALLOWED_HOSTS = []


# Application definition

INSTALLED_APPS = (
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'blog',
)

MIDDLEWARE_CLASSES = (
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
)

ROOT_URLCONF = 'mysite.urls'

WSGI_APPLICATION = 'mysite.wsgi.application'


# Database
# https://docs.djangoproject.com/en/1.7/ref/settings/#databases

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
    }
}

# Internationalization
# https://docs.djangoproject.com/en/1.7/topics/i18n/

LANGUAGE_CODE = 'en-us'

TIME_ZONE = 'America/Chicago'

USE_I18N = True

USE_L10N = True

USE_TZ = False


# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/1.7/howto/static-files/

STATIC_URL = '/static/'

import dj_database_url
DATABASES['default'] = dj_database_url.config()

SECURE_PROXY_SSL_HEADER = ('HTTP_X_FORWARDED_PROTO', 'https')

ALLOWED_HOSTS = ['*']

STATIC_ROOT = 'staticfiles'

DEBUG = False

try:
    from .local_settings import *
except ImportError:
    pass

STATICFILES_DIRS = (
    os.path.join(BASE_DIR, "static"),
)

博客/ views.py

from django.shortcuts import render, get_object_or_404
from django.utils import timezone
from .models import Post
from .forms import PostForm

# Create your views here.

def post_list(request):
    posts = Post.objects.filter(published_date__lte=timezone.now()).order_by('published_date')
    return render(request, 'blog/post_list.html', {'posts': posts})

def post_detail(request, pk):
    post = get_object_or_404(Post, pk=pk)
    return render(request, 'blog/post_detail.html', {'post': post})

def post_new(request):
    form = PostForm()
    return render(request, 'blog/post_edit.html', {'form': form})

我真的很陌生，所以请原谅“简单”的错误。

Answer 1

老帖子，但似乎没有回答，所以我会开枪。在遇到类似问题之后，我通过谷歌被带到了这里。

这个问题可能是heroku方面缺少的数据库。如果你是通过git推送的，并且db.sqlite3在你的.gitignore中，它肯定会在那里丢失，需要在那里创建。当摆弄一个预先制作的例子（尚未创建数据库）时，这正是我的问题。

$ python manage.py migrate

你的heroku环境中的

应该修复它。

Answer 2

我做了两件事来解决这个问题：

如上文的David Nugent所述，在服务器控制台中键入python3 manage.py migrate。
在.gitignore文件中，我不得不注释掉db.sqlite3。然后，我提交并推送了此更改，然后又回到了我的服务器（在我的示例中为pythonanywhere，而不是heroku），并执行了git pull。

Answer 3

在models.py中包含此声明：

from django.contrib.auth.models import User

Answer 4

这是因为在Heroku上你很可能安装了postgresql后端，而不是sqlite。您需要配置您的生产部署以正确使用postgresql ...我会给出相关说明，但我现在必须弄清楚...

Answer 5

我遇到了同样的问题，并在reddit上找到了解决方案。使用

git add -f db.sqlite3

然后提交，推送，最后拉上pythonanywhere.com。

对reddit用户的信用elbuckez＆amp; jeans_and_a_t恤

Answer 6

在这些命令之后运行此命令python manage.py migrate --run-syncdb

python manage.py migrate
python manage.py makemigrations

操作错误没有这样的表Django

6 个答案: