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在 Django 项目中，我有一个应用程序 otherapp，它访问远程服务器上的 Postgres 数据库，其中包含抓取的数据。我有第二个应用程序内容，它访问同一远程服务器上的不同Postgres 数据库，并包含我希望通过 Wagtail CMS 提供服务的页面。

我使用这些说明在本地安装了 Wagtail（我没有使用 Wagtail 安装程序）。我让它在本地工作。然后，我做了一个本地数据库的 pg_dump 并在远程数据库服务器上做了 psql db2 < db2dumpfile.sql。

每个应用程序都可以单独在本地正常工作，但我无法让它们一起工作。我想我可以使用数据库路由器来指定我想使用哪个数据库来检索不同类型的数据。

但是，当我将数据库路由器放入设置文件时，它开始出现故障。我怎样才能解决这个问题？我需要在项目的其他地方声明 wagtailcore 吗？

设置.py：

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql_psycopg2',
        'NAME': 'db1',
        'USER': DB_USERNAME,
        'PASSWORD': DB_PASSWORD,
        'HOST': HOST,
        'PORT': PORT 
    },
    'CMS': {
        'ENGINE': 'django.db.backends.postgresql_psycopg2',
        'NAME': 'db2',
        'USER': DB_USERNAME,
        'PASSWORD': DB_PASSWORD,
        'HOST': HOST,
        'PORT': PORT 
    }

}
DATABASE_ROUTERS = [ 'projectname.routers.FindRouter',]

路由器.py：

import os
from django.conf import settings
import socket
class FindRouter(object):
    def db_for_read(self, model, **hints) :
        if model._meta.app_label == 'content' :
            return 'CMS'
        return None
    def db_for_read(self, model, **hints):
        if model._meta.app_label == 'content' :
            return 'CMS'
        return None
    def db_for_write(self, model, **hints):
        if model._meta.app_label == 'content' :
            return 'CMS'
        return None
    def allow_relation(self, obj1, obj2, **hints):
        if obj1._meta.app_label == 'content' or obj2._meta.app_label == 'content':
            return True
        return None
    def allow_migrate(self, db, app_label, model=None, **hints):
        if app_label == 'content' :
            return db == 'CMS'
        return None

这是我在运行服务器时遇到的错误：

Environment:


Request Method: GET
Request URL: http://127.0.0.1:8000/cms/

Django Version: 1.9
Python Version: 2.7.10
Installed Applications:
['django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'wagtail.wagtailforms',
 'wagtail.wagtailredirects',
 'wagtail.wagtailembeds',
 'wagtail.wagtailsites',
 'wagtail.wagtailusers',
 'wagtail.wagtailsnippets',
 'wagtail.wagtaildocs',
 'wagtail.wagtailimages',
 'wagtail.wagtailsearch',
 'wagtail.wagtailadmin',
 'wagtail.wagtailcore',
 'modelcluster',
 'compressor',
 'taggit',
 'otherapp',
 'content']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
 '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',
 'django.middleware.security.SecurityMiddleware',
 'wagtail.wagtailcore.middleware.SiteMiddleware',
 'wagtail.wagtailredirects.middleware.RedirectMiddleware']



Traceback:

File "/Users/username/.virtualenvs/bail/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
  123.                 response = middleware_method(request)

File "/Users/username/.virtualenvs/bail/lib/python2.7/site-packages/wagtail/wagtailcore/middleware.py" in process_request
  11.             request.site = Site.find_for_request(request)

File "/Users/username/.virtualenvs/bail/lib/python2.7/site-packages/wagtail/wagtailcore/models.py" in find_for_request
  122.                 return Site.objects.get(hostname=hostname)  # Site.DoesNotExist here goes to the final except clause

File "/Users/username/.virtualenvs/bail/lib/python2.7/site-packages/django/db/models/manager.py" in manager_method
  122.                 return getattr(self.get_queryset(), name)(*args, **kwargs)

File "/Users/username/.virtualenvs/bail/lib/python2.7/site-packages/django/db/models/query.py" in get
  381.         num = len(clone)

File "/Users/username/.virtualenvs/bail/lib/python2.7/site-packages/django/db/models/query.py" in __len__
  240.         self._fetch_all()

File "/Users/username/.virtualenvs/bail/lib/python2.7/site-packages/django/db/models/query.py" in _fetch_all
  1074.             self._result_cache = list(self.iterator())

File "/Users/username/.virtualenvs/bail/lib/python2.7/site-packages/django/db/models/query.py" in __iter__
  52.         results = compiler.execute_sql()

File "/Users/username/.virtualenvs/bail/lib/python2.7/site-packages/django/db/models/sql/compiler.py" in execute_sql
  852.             cursor.execute(sql, params)

File "/Users/username/.virtualenvs/bail/lib/python2.7/site-packages/django/db/backends/utils.py" in execute
  79.             return super(CursorDebugWrapper, self).execute(sql, params)

File "/Users/username/.virtualenvs/bail/lib/python2.7/site-packages/django/db/backends/utils.py" in execute
  64.                 return self.cursor.execute(sql, params)

File "/Users/username/.virtualenvs/bail/lib/python2.7/site-packages/django/db/utils.py" in __exit__
  95.                 six.reraise(dj_exc_type, dj_exc_value, traceback)

File "/Users/username/.virtualenvs/bail/lib/python2.7/site-packages/django/db/backends/utils.py" in execute
  64.                 return self.cursor.execute(sql, params)

Exception Type: ProgrammingError at /cms/
Exception Value: relation "wagtailcore_site" does not exist
LINE 1: ...ge_id", "wagtailcore_site"."is_default_site" FROM "wagtailco...
                                                             ^
4

1 回答 1

1

我放弃并将 Wagtail 表放回第一个数据库，现在应用程序的两个部分可以正常工作。

于 2016-01-07T18:15:41.210 回答