Django DeleteView選擇要使用的數據庫

我將從第二個非託管數據庫（pgsql）中刪除一個對象。Django DeleteView選擇要使用的數據庫

view.py

class DeleteDomain(DeleteView): 
    model = Domains 
    template_name = 'domain/delete_domain.html' 

    @method_decorator(login_required) 
    def dispatch(self, *args, **kwargs): 
     return super(DeleteDomain, self).dispatch(*args, **kwargs) 

    def get_object(self, *args, **kwargs): 
     obj = super(DeleteDomain, self).get_object(*args, **kwargs) 
     if obj.created_by != self.request.user: 
      raise Http404 
     return obj 

    def get_success_url(self): 
     return reverse('overview') 

    def get_context_data(self, **kwargs): 
     context = super(DeleteDomain, self).get_context_data(**kwargs) 
     context['nav_overview'] = True 
     return context

settings.py：

DATABASES = { 
    'default': { 
     'ENGINE': 'django.db.backends.sqlite3', 
     'NAME': os.path.join(BASE_DIR, 'db.sqlite3'), 
    }, 
    'pgsql': { 
     'ENGINE': 'django.db.backends.postgresql', 
     'HOST': 'localhost', 
     'PORT': '5432', 
     'PASSWORD': 'xxxxx', 
     'USER': 'vmailuser', 
     'NAME': 'virtualmail', 
     'OPTIONS': { 
      'options': '-c search_path=public' 
     }, 
    } 
}

models.py：

# -*- coding: utf-8 -*- 
from django.db import models 
from django.utils.translation import ugettext_lazy as _ 
from django.core.validators import RegexValidator 


class Domains(models.Model): 
    id = models.AutoField(primary_key=True, 
          unique=True) 
    domain = (
     models.CharField(max_length=255, 
         blank=False, 
         null=True, 
         validators=[RegexValidator(
          regex=r"([a-zA-Z0-9-_]+\.)+[a-zA-Z0-9-_] 
            {2,}", 
          message=_("Invalid domain name") 
         )], 
         help_text=_('Please enter the email Domain 
            here')  
         ) 
    ) 
    created_by = (
     models.CharField(max_length=255) 
    ) 

    class Meta: 
     managed = False 
     db_table = 'domains' 

    def __unicode__(self): 
     return self.domain

urls.py： ＃ - - 編碼：UTF-8 - -

from django.conf.urls import url 
from .views import AddDomainView, DeleteDomain 


urlpatterns = [ 
    url(r'add', AddDomainView.as_view(), name='add_domain'), 
    url(r'(?P<pk>\d+)/delete/$', DeleteDomain.as_view(), 
      name='delete_domain'),

如果我嘗試訪問https://localhost:8080/1/delete

我得到：

Exception Value:  
no such table: domains

在我Consolelog ：

Internal Server Error: /domain/12/delete/ 
Traceback (most recent call last): 
    File "/home/smindorf/PycharmProjects/venv/django/vmailpostfix/lib/python3.5/site-packages/django/db/backends/utils.py", line 65, in execute 
    return self.cursor.execute(sql, params) 
    File "/home/smindorf/PycharmProjects/venv/django/vmailpostfix/lib/python3.5/site-packages/django/db/backends/sqlite3/base.py", line 328, in execute 
    return Database.Cursor.execute(self, query, params) 
sqlite3.OperationalError: no such table: domains 

The above exception was the direct cause of the following exception: 

Traceback (most recent call last): 
    File "/home/smindorf/PycharmProjects/venv/django/vmailpostfix/lib/python3.5/site-packages/django/core/handlers/exception.py", line 41, in inner 
    response = get_response(request) 
    File "/home/smindorf/PycharmProjects/venv/django/vmailpostfix/lib/python3.5/site-packages/django/core/handlers/base.py", line 249, in _legacy_get_response 
    response = self._get_response(request) 
    File "/home/smindorf/PycharmProjects/venv/django/vmailpostfix/lib/python3.5/site-packages/django/core/handlers/base.py", line 187, in _get_response 
    response = self.process_exception_by_middleware(e, request) 
    File "/home/smindorf/PycharmProjects/venv/django/vmailpostfix/lib/python3.5/site-packages/django/core/handlers/base.py", line 185, in _get_response 
    response = wrapped_callback(request, *callback_args, **callback_kwargs) 
    File "/home/smindorf/PycharmProjects/venv/django/vmailpostfix/lib/python3.5/site-packages/django/views/generic/base.py", line 68, in view 
    return self.dispatch(request, *args, **kwargs) 
    File "/home/smindorf/PycharmProjects/venv/django/vmailpostfix/lib/python3.5/site-packages/django/utils/decorators.py", line 67, in _wrapper 
    return bound_func(*args, **kwargs) 
    File "/home/smindorf/PycharmProjects/venv/django/vmailpostfix/lib/python3.5/site-packages/django/contrib/auth/decorators.py", line 23, in _wrapped_view 
    return view_func(request, *args, **kwargs) 
    File "/home/smindorf/PycharmProjects/venv/django/vmailpostfix/lib/python3.5/site-packages/django/utils/decorators.py", line 63, in bound_func 
    return func.__get__(self, type(self))(*args2, **kwargs2) 
    File "/home/smindorf/PycharmProjects/django/vmailpostfix/vmail/domain/views.py", line 59, in dispatch 
    return super(DeleteDomain, self).dispatch(*args, **kwargs) 
    File "/home/smindorf/PycharmProjects/venv/django/vmailpostfix/lib/python3.5/site-packages/django/views/generic/base.py", line 88, in dispatch 
    return handler(request, *args, **kwargs) 
    File "/home/smindorf/PycharmProjects/venv/django/vmailpostfix/lib/python3.5/site-packages/django/views/generic/detail.py", line 115, in get 
    self.object = self.get_object() 
    File "/home/smindorf/PycharmProjects/django/vmailpostfix/vmail/domain/views.py", line 62, in get_object 
    obj = super(DeleteDomain, self).get_object(*args, **kwargs) 
    File "/home/smindorf/PycharmProjects/venv/django/vmailpostfix/lib/python3.5/site-packages/django/views/generic/detail.py", line 53, in get_object 
    obj = queryset.get() 
    File "/home/smindorf/PycharmProjects/venv/django/vmailpostfix/lib/python3.5/site-packages/django/db/models/query.py", line 374, in get 
    num = len(clone) 
    File "/home/smindorf/PycharmProjects/venv/django/vmailpostfix/lib/python3.5/site-packages/django/db/models/query.py", line 232, in __len__ 
    self._fetch_all() 
    File "/home/smindorf/PycharmProjects/venv/django/vmailpostfix/lib/python3.5/site-packages/django/db/models/query.py", line 1118, in _fetch_all 
    self._result_cache = list(self._iterable_class(self)) 
    File "/home/smindorf/PycharmProjects/venv/django/vmailpostfix/lib/python3.5/site-packages/django/db/models/query.py", line 53, in __iter__ 
    results = compiler.execute_sql(chunked_fetch=self.chunked_fetch) 
    File "/home/smindorf/PycharmProjects/venv/django/vmailpostfix/lib/python3.5/site-packages/django/db/models/sql/compiler.py", line 894, in execute_sql 
    raise original_exception 
    File "/home/smindorf/PycharmProjects/venv/django/vmailpostfix/lib/python3.5/site-packages/django/db/models/sql/compiler.py", line 884, in execute_sql 
    cursor.execute(sql, params) 
    File "/home/smindorf/PycharmProjects/venv/django/vmailpostfix/lib/python3.5/site-packages/django/db/backends/utils.py", line 80, in execute 
    return super(CursorDebugWrapper, self).execute(sql, params) 
    File "/home/smindorf/PycharmProjects/venv/django/vmailpostfix/lib/python3.5/site-packages/django/db/backends/utils.py", line 65, in execute 
    return self.cursor.execute(sql, params) 
    File "/home/smindorf/PycharmProjects/venv/django/vmailpostfix/lib/python3.5/site-packages/django/db/utils.py", line 94, in __exit__ 
    six.reraise(dj_exc_type, dj_exc_value, traceback) 
    File "/home/smindorf/PycharmProjects/venv/django/vmailpostfix/lib/python3.5/site-packages/django/utils/six.py", line 685, in reraise 
    raise value.with_traceback(tb) 
    File "/home/smindorf/PycharmProjects/venv/django/vmailpostfix/lib/python3.5/site-packages/django/db/backends/utils.py", line 65, in execute 
    return self.cursor.execute(sql, params) 
    File "/home/smindorf/PycharmProjects/venv/django/vmailpostfix/lib/python3.5/site-packages/django/db/backends/sqlite3/base.py", line 328, in execute 
    return Database.Cursor.execute(self, query, params) 
django.db.utils.OperationalError: no such table: domains

如何在我的視圖中選擇我的pgsql-Database？我不知道如何在我看來訪問我的數據庫。

感謝

更新1：

在這個視圖我可以訪問：

class AddDomainView(CreateView): 
    template_name = 'domain/add_domain.html' 
    model = Domains 
    form_class = CreateDomainForm 

    @method_decorator(login_required) 
    def dispatch(self, *args, **kwargs): 
     return super(AddDomainView, self).dispatch(*args, **kwargs) 

    def get_form(self, form_class=form_class): 
     form = super(AddDomainView, self).get_form(form_class) 
     form.fields['domain'].queryset = Domains.objects.using('pgsql').all() 
     return form 

    def form_valid(self, form): 
     self.object = form.save(commit=False) 
     try: 
      socket.gethostbyname(self.object.domain) 
     except socket.gaierror: 
      success, level, msg = False, messages.ERROR, _('Base domain does not exist.') 
     else: 
      try: 
       self.object.created_by = self.request.user 
       self.object.save(using='pgsql') 
       success, level, msg = True, messages.SUCCESS, _('Domain added.') 
      except IntegrityError: 
       success, level, msg = False, messages.WARNING, _('Domain already exists .') 
     messages.add_message(self.request, level, msg) 
     url = reverse('overview') 
     return HttpResponseRedirect(url)

更新2：

我的數據庫模式：

CREATE TABLE domains (
    id integer NOT NULL, 
    domain character varying(255) NOT NULL, 
    created_by character varying 
);

來源

2017-10-28 Soeren

你是否運行遷移將表部署到數據庫？ –

是的，但我有同樣的錯誤，因爲我想訪問postgresql Databse而不是sqlite3。 – Soeren

在settings.py中設置正確的postgresql憑據。您不需要設置訪問權限，但僅限於設置。 –

你能交叉檢查一次嗎？似乎你有用戶Domains而不是domain

來源

2017-10-28 17:24:02

請參閱上面的更新2 – Soeren

Django DeleteView選擇要使用的數據庫

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