Django：操作错误没有这样的表

我正在使用 Django-CMS 的 Django 项目中构建一个相当简单的应用程序 Research。 （这是我对项目/应用程序的第一次尝试。）它的主要目的是存储各种知识资产（即研究人员撰写的文章、书籍等）。

问题是当我将浏览器指向/research/我收到一条错误消息说table 'research_journal' doesn't exist ("no such table").

我正在使用 Django 1.6.5 和 sqlite3 数据库。

看着python manage.py sql research yields:

BEGIN;
CREATE TABLE "research_researchbase" (
    "id" integer NOT NULL PRIMARY KEY,
    "pub_date" datetime NOT NULL,
    "authors" varchar(200) NOT NULL,
    "year" varchar(25) NOT NULL,
    "title" varchar(200) NOT NULL,
    "subtitle" varchar(200) NOT NULL,
    "image_id" integer NOT NULL REFERENCES "filer_image" ("file_ptr_id"),
    "link" varchar(200) NOT NULL
)
;
CREATE TABLE "research_journal" (
    "researchbase_ptr_id" integer NOT NULL PRIMARY KEY REFERENCES "research_researchbase" ("id"),
    "journal" varchar(200) NOT NULL,
    "abstract" text NOT NULL,
    "citation" varchar(200) NOT NULL
)
;
CREATE TABLE "research_encyclopedia_chapter" (
    "researchbase_ptr_id" integer NOT NULL PRIMARY KEY REFERENCES "research_researchbase" ("id"),
    "encyclopedia" varchar(200) NOT NULL,
    "publisher" varchar(200) NOT NULL,
    "summary" varchar(200) NOT NULL
)
;
CREATE TABLE "research_book" (
    "researchbase_ptr_id" integer NOT NULL PRIMARY KEY REFERENCES "research_researchbase" ("id"),
    "publisher" varchar(200) NOT NULL,
    "summary" varchar(200) NOT NULL
)
;

COMMIT;

我已经跑了python manage.py migrate research并得到：

/Users/XXX/Documents/repos/sfs/env/lib/python2.7/site-packages/app_data/fields.py:2: DeprecationWarning: django.utils.simplejson is deprecated; use json instead.
  from django.utils import simplejson as json

Running migrations for research:
- Nothing to migrate.
 - Loading initial data for research.
Installed 0 object(s) from 0 fixture(s)

我已经跑了python manage.py syncdb并得到以下内容：

Syncing...
Creating tables ...
Installing custom SQL ...
Installing indexes ...
Installed 0 object(s) from 0 fixture(s)

Synced:
 > djangocms_admin_style
 > django.contrib.auth
 > django.contrib.contenttypes
 > django.contrib.sessions
 > django.contrib.admin
 > django.contrib.sites
 > django.contrib.sitemaps
 > django.contrib.staticfiles
 > django.contrib.messages
 > mptt
 > south
 > sekizai
 > django_select2
 > hvad

Not synced (use migrations):
 - djangocms_text_ckeditor
 - cms
 - menus
 - djangocms_style
 - djangocms_column
 - djangocms_file
 - djangocms_flash
 - djangocms_googlemap
 - djangocms_inherit
 - djangocms_link
 - djangocms_picture
 - djangocms_teaser
 - djangocms_video
 - reversion
 - polls
 - djangocms_polls
 - aldryn_blog
 - easy_thumbnails
 - filer
 - taggit
 - research
(use ./manage.py migrate to migrate these)

这是models.py:

from django.db import models
from django.utils import timezone
from filer.fields.image import FilerImageField

import datetime

class ResearchBase(models.Model):
    pub_date = models.DateTimeField('date published')
    authors = models.CharField(max_length=200)
    year = models.CharField(max_length=25)
    title = models.CharField(max_length=200)
    subtitle = models.CharField(max_length=200, blank=True)
    image = FilerImageField()
    link = models.CharField(max_length=200, blank=True)
    
    def __unicode__(self):
        return self.title
    
    def was_published_recently(self):
        return self.pub_date >= timezone.now() - datetime.timedelta(days=1)
        

class Journal(ResearchBase):
    journal = models.CharField(max_length=200)
    abstract = models.TextField()
    citation = models.CharField(max_length=200)
    
    
class Encyclopedia_Chapter(ResearchBase):
    encyclopedia = models.CharField(max_length=200)
    publisher = models.CharField(max_length=200)
    summary = models.CharField(max_length=200)
    
        
class Book(ResearchBase):
    publisher = models.CharField(max_length=200)
    summary = models.CharField(max_length=200)

这是我的views.py（请注意，我通过渲染传递了两个对象，忽略我尚未将 Books 类包含在整个交易中的事实）：

from django.shortcuts import render, get_object_or_404
from django.http import HttpResponse, Http404
from django.template import RequestContext, loader

from research.models import Journal, Encyclopedia_Chapter, Book

def research_index(request):
    latest_journal_list = Journal.objects.order_by('-pub_date')[:5]
    latest_chapter_list = Encyclopedia_Chapter.objects.order_by('-pub_date')[:5]
    
    context = {
        'latest_journal_list': latest_journal_list,
        'latest_chapter_list': latest_chapter_list
    }
    
    return render(request, 'research/index.html', context)
    
def journal_detail(request, journal_id):
    journal = get_object_or_404(Journal, pk=journal_id)
    return render(request, 'research/journal_detail.html', {'journal': journal})
    
def chapter_detail(request, chapter_id):
    chapter = get_object_or_404(Encyclopedia_Chapter, pk=chapter_id)
    return render(request, 'research/chapter_detail.html', {'chapter': chapter})

这是应用程序的url.py:

from django.conf.urls import patterns, url

from research import views

urlpatterns = patterns('',
    url(r'^$', views.research_index, name='research'),
    url(r'^(?P<journal_id>\d+)/$', views.journal_detail, name='journal_detail'),
    url(r'^(?P<chapter_id>\d+)/$', views.chapter_detail, name='chapter_detail'),
)

这是index.html模板：

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

{% block research_content %}

<div class="container">
    <div class="row featurette">
        <h3 id="research">Peer-reviewed Journal Articles</h3>
        {% if latest_journal_list %}
            <ul id="research">
            {% for journal in latest_journal_list %}
                <li id="research">
                            <img src="{{ journal.image.url }}" id="research">
                            <h4>{{ journal.journal }}</h4>
                            <h5>{{ journal.title }}</h5>
                            <a href="{% url 'research:journal_detail' journal.id %}">Read More</a>
                        </li>
            {% endfor %}
            </ul>
        {% else %}
            <p>No journals are available.</p>
        {% endif %}
    </div>
    
    <div class="row featurette">
        <h3 id="research">Encyclopedia Chapters</h3>
        {% if latest_chapter_list %}
            <ul id="research">
            {% for chapter in latest_chapter_list %}
                <li id="research">
                            <img src="{{ chapter.image.url }}" id="research">
                            <h4>{{ chapter.journal }}</h4>
                            <h5>{{ chapter.title }}</h5>
                            <a href="{% url 'research:chapter_detail' chapter.id %}">Read More</a>
                        </li>
            {% endfor %}
            </ul>
        {% else %}
            <p>No encyclopedia chapters are available.</p>
        {% endif %}
    </div>
</div>

{% endblock %}

以防万一，这是我的cms_app.py:

from cms.app_base import CMSApp
from cms.apphook_pool import apphook_pool
from django.utils.translation import ugettext_lazy as _


class ResearchApp(CMSApp):
    name = _("Research App")
    urls = ["research.urls"]
    app_name = "research"

apphook_pool.register(ResearchApp)

Use:

python manage.py migrate --run-syncdb 

As 这条评论中指出 https://stackoverflow.com/questions/25771755/django-operationalerror-no-such-table/37799885#comment90348355_37799885 by 本雅明·贾法里 https://stackoverflow.com/users/3702377/benyamin-jafari:

--run-syncdb- 为应用程序创建表而无需迁移。

另外不要忘记指定应用程序路径。例如：

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