Question

这是我对Stackoverflow的第一个问题。如果出现任何问题，请告诉我。非常感谢!!

https://docs.djangoproject.com/en/1.9/topics/db/multi-db/#exposing-multiple-databases-in-django-s-admin-interface

我按照django官方文件，但仍然无法工作。

在shell中，它可以显示来自不同数据库的数据，这意味着路由器可以很好地工作。

但它无法在管理站点中运行。 image captures here

或者引发“LookupError”“没有安装带有标签'洞察'的应用。”当我从

改变

othersite.register(CrawlerIndex, CrawlerIndexAdmin)

到

admin.site.register(CrawlerIndex, CrawlerIndexAdmin)

在admin.py中

这是我的admin.py

from django.contrib import admin
from models import MonitorCrawlers, CrawlerIndex

# Register your models here.
admin.autodiscover()

class MultiDBModelAdmin(admin.ModelAdmin):
    # A handy constant for the name of the alternate database.

    def save_model(self, request, obj, form, change):
        # Tell Django to save objects to the 'other' database.
        obj.save(using=self.using)

    def delete_model(self, request, obj):
        # Tell Django to delete objects from the 'other' database
        obj.delete(using=self.using)

    def get_queryset(self, request):
        # Tell Django to look for objects on the 'other' database.
        return super(MultiDBModelAdmin, self).get_queryset(request).using(self.using)

    def formfield_for_foreignkey(self, db_field, request=None, **kwargs):
        # Tell Django to populate ForeignKey widgets using a query
        # on the 'other' database.
        return super(MultiDBModelAdmin, self).formfield_for_foreignkey(db_field, request=request, using=self.using, **kwargs)

    def formfield_for_manytomany(self, db_field, request=None, **kwargs):
        # Tell Django to populate ManyToMany widgets using a query
        # on the 'other' database.
        return super(MultiDBModelAdmin, self).formfield_for_manytomany(db_field, request=request, using=self.using, **kwargs)

class MultiDBModelAdmin2(MultiDBModelAdmin):
    using = 'insight_db'

class MonitorCrawlersAdmin(admin.ModelAdmin):
    pass

class CrawlerIndexAdmin(MultiDBModelAdmin2):
    pass

othersite = admin.AdminSite('insight_db')
othersite.register(CrawlerIndex, CrawlerIndexAdmin)

admin.site.register(MonitorCrawlers, MonitorCrawlersAdmin)

和setting.py

的一部分

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'table',
    'table.templatetags.extfilter',
    'django.contrib.humanize',
]
DATABASE_APPS_MAPPING = {
    'insight': 'insight_db',
}
DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': 'myapp1',
        'USER': '',
        'PASSWORD': '',
        'HOST': 'xxx.xxx.xxx.73',
        'PORT': '3306',
    },
    'insight_db': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': 'crawler',
        'USER': '',
        'PASSWORD': '',
        'HOST': 'xxx.xxx.xxx.73',
        'PORT': '3306',
    }
}
DATABASE_ROUTERS = ['table.db_router.InsightRouter',]

和InsightRouter.py

class InsightRouter(object):
    """
    A router to control all database operations on models in the
    insight_db application.
    """
    def db_for_read(self, model, **hints):
        """
        Attempts to read insight_db models go to insight_db.
        """
        if model._meta.app_label == 'insight':
            return 'insight_db'
        return None

    def db_for_write(self, model, **hints):
        """
        Attempts to write insight_db models go to insight_db.
        """
        if model._meta.app_label == 'insight':
            return 'insight_db'
        return None

    def allow_relation(self, obj1, obj2, **hints):
        """
        Allow relations if a model in the insight_db app is involved.
        """
        if obj1._meta.app_label == 'insight' or \
           obj2._meta.app_label == 'insight_db':
           return True
        return None

    def allow_migrate(self, db, app_label, model_name=None, **hints):
        """
        Make sure the insight_db app only appears in the 'insight_db'
        database.
        """
        if app_label == 'insight':
            return db == 'insight_db'
        return None

和models.py

class CrawlerIndex(models.Model):

    blahblahblah


    class Meta:
        app_label = 'insight'
        managed = False
        db_table = 'crawler_index'

如何使用管理界面管理来自不同数据库的日期库？

0 个答案: