Python Django migrate_schemas --shared TypeError: hasattr(): attribute name must be string upon
Question: I am trying to create a python django-mako-plus project with a django-tenant-
schema. I followed the instructions exactly as the tutorial here:

<https://django-tenant-schemas.readthedocs.org/en/latest/install.html#basic-
settings>

However, when I run cmd: python manage.py migrate_schemas --shared, I get the
following error:

    
    
    File "C:\Python34\lib\site-packages\django\db\utils.py", line 234, in __getitem__
    if hasattr(self._connections, alias):
    TypeError: hasattr(): attribute name must be string
    

What are the possible issues?

FYI, here is my settings file:

    
    
    """
    Django settings for tents_dmp project.
    
    Generated by 'django-admin startproject' using Django 1.8.1.
    
    For more information on this file, see
    https://docs.djangoproject.com/en/1.8/topics/settings/
    
    For the full list of settings and their values, see
    https://docs.djangoproject.com/en/1.8/ref/settings/
    """
    
    # Build paths inside the project like this: os.path.join(BASE_DIR, ...)
    import os
    
    BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
    
    
    # Quick-start development settings - unsuitable for production
    # See https://docs.djangoproject.com/en/1.8/howto/deployment/checklist/
    
    # SECURITY WARNING: keep the secret key used in production secret!
    SECRET_KEY = 'ekr-az&e)g_7&&%um+c%652b72#e035a#_y7rv19jl1qj47t)k'
    
    # SECURITY WARNING: don't run with debug turned on in production!
    DEBUG = True
    
    ALLOWED_HOSTS = []
    
    
    # Application definition
    
    SHARED_APPS = (
        'tenant_schemas',  # mandatory
        #'customers', # you must list the app where your tenant model resides in
        'homepage',
    
        'django.contrib.contenttypes',
    
        # everything below here is optional
        'django.contrib.auth',
        'django.contrib.sessions',
        'django.contrib.sites',
        'django.contrib.messages',
        'django.contrib.admin',
    
        #'django.contrib.staticfiles',
        #'django_mako_plus.controller',
    )
    
    TENANT_APPS = (
        # The following Django contrib apps must be in TENANT_APPS
        'django.contrib.contenttypes',
    
        # your tenant-specific apps
    )
    
    INSTALLED_APPS = list(set(SHARED_APPS + TENANT_APPS))
    
    TENANT_MODEL = "homepage.Client" # app.Model
    
    
    
    MIDDLEWARE_CLASSES = (
        'tenant_schemas.middleware.TenantMiddleware',
        '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',
        'django_mako_plus.controller.router.RequestInitMiddleware',
    )
    
    ROOT_URLCONF = 'tents_dmp.urls'
    
    TEMPLATES = [
        {
            'BACKEND': 'django.template.backends.django.DjangoTemplates',
            'DIRS': [],
            'APP_DIRS': True,
            'OPTIONS': {
                'context_processors': [
                    #'django.core.context_processors.request',
                    'django.template.context_processors.debug',
                    'django.template.context_processors.request',
                    'django.contrib.auth.context_processors.auth',
                    'django.contrib.messages.context_processors.messages',
                ],
            },
        },
    ]
    
    TEMPLATE_CONTEXT_PROCESSORS = (
        'django.core.context_processors.request',
        #...
    )
    WSGI_APPLICATION = 'tents_dmp.wsgi.application'
    
    
    # Database
    # https://docs.djangoproject.com/en/1.8/ref/settings/#databases
    
    DATABASES = {
        'default': {
            'ENGINE': 'tenant_schemas.postgresql_backend',
            'NAME': 'database2',
            'USER': 'postgres',
            'PASSWORD': 'XXX',
            'HOST': '127.0.0.1',
            'PORT': '5432',
        }
    }
    
    DATABASE_ROUTERS = (
        'tenant_schemas.routers.TenantSyncRouter',
    )
    # Internationalization
    # https://docs.djangoproject.com/en/1.8/topics/i18n/
    
    LANGUAGE_CODE = 'en-us'
    
    TIME_ZONE = 'UTC'
    
    USE_I18N = True
    
    USE_L10N = True
    
    USE_TZ = True
    
    
    # Static files (CSS, JavaScript, Images)
    # https://docs.djangoproject.com/en/1.8/howto/static-files/
    
    STATIC_URL = '/static/'
    
    STATICFILES_DIRS = (
         # SECURITY WARNING: this next line must be commented out at deployment
        BASE_DIR,  
    )
    STATIC_ROOT = os.path.join(BASE_DIR, 'static')  
    
    
    
    
    DEBUG_PROPAGATE_EXCEPTIONS = DEBUG  # never set this True on a live site
    LOGGING = {
        'version': 1,
        'disable_existing_loggers': True,
        'formatters': {
            'simple': {
                'format': '%(levelname)s %(message)s'
            },
        },
        'handlers': {
            'console':{
                'level':'DEBUG',
                'class':'logging.StreamHandler',
                'formatter': 'simple'
            },
        },
        'loggers': {
            'django_mako_plus': {
                'handlers': ['console'],
                'level': 'DEBUG',
                'propagate': False,
            },
        },
    }
    
    
    ###############################################################
    ###   Specific settings for the Django-Mako-Plus app
    
    DJANGO_MAKO_PLUS = {
        # identifies where the Mako template cache will be stored, relative to each app
        'TEMPLATES_CACHE_DIR': 'cached_templates',
    
        # the default app and page to render in Mako when the url is too short
        'DEFAULT_PAGE': 'index',
        'DEFAULT_APP': 'homepage',
    
        # the default encoding of template files
        'DEFAULT_TEMPLATE_ENCODING': 'utf-8',
    
        # these are included in every template by default - if you put your most-used libraries here, you won't have to import them exlicitly in templates
        'DEFAULT_TEMPLATE_IMPORTS': [
            'import os, os.path, re, json',
        ],
    
         # see the DMP online tutorial for information about this setting
        'URL_START_INDEX': 0,
    
         # whether to send the custom DMP signals -- set to False for a slight speed-up in router processing
         # determines whether DMP will send its custom signals during the process
        'SIGNALS': True,
    
         # whether to minify using rjsmin, rcssmin during 1) collection of static files, and 2) on the fly as .jsm and .cssm files are rendered
         # rjsmin and rcssmin are fast enough that doing it on the fly can be done without slowing requests down
        'MINIFY_JS_CSS': True,
    
         # see the DMP online tutorial for information about this setting
        'TEMPLATES_DIRS': [ 
           # '/var/somewhere/templates/',
        ],
    }
    
     ###  End of settings for the Django-Mako-Plus
     ################################################################
    

and my models.py file in the homepage app:

    
    
    from django.db import models
    from tenant_schemas.models import TenantMixin
    
    class Client(TenantMixin):
        name = models.CharField(max_length=100)
        paid_until =  models.DateField()
        on_trial = models.BooleanField()
        created_on = models.DateField(auto_now_add=True)
    
        auto_create_schema = True
    

Any help would be greatly appreciated

    
    
    C:\Users\Desktop\django\tents_dmp>python manage.py migrate_schemas
    --shared
    === Running migrate for schema public
    Traceback (most recent call last):
      File "manage.py", line 10, in <module>
        execute_from_command_line(sys.argv)
      File "C:\Python34\lib\site-packages\django\core\management\__init__.py", line
    338, in execute_from_command_line
        utility.execute()
      File "C:\Python34\lib\site-packages\django\core\management\__init__.py", line
    330, in execute
        self.fetch_command(subcommand).run_from_argv(self.argv)
      File "C:\Python34\lib\site-packages\tenant_schemas\management\commands\migrate
    _schemas.py", line 24, in run_from_argv
        super(MigrateSchemasCommand, self).run_from_argv(argv)
      File "C:\Python34\lib\site-packages\django\core\management\base.py", line 390,
     in run_from_argv
        self.execute(*args, **cmd_options)
      File "C:\Python34\lib\site-packages\django\core\management\base.py", line 441,
     in execute
        output = self.handle(*args, **options)
      File "C:\Python34\lib\site-packages\tenant_schemas\management\commands\migrate
    _schemas.py", line 34, in handle
        self.run_migrations(self.schema_name, settings.SHARED_APPS)
      File "C:\Python34\lib\site-packages\tenant_schemas\management\commands\migrate
    _schemas.py", line 61, in run_migrations
        command.execute(*self.args, **defaults)
      File "C:\Python34\lib\site-packages\django\core\management\base.py", line 441,
     in execute
        output = self.handle(*args, **options)
      File "C:\Python34\lib\site-packages\django\core\management\commands\migrate.py
    ", line 70, in handle
        connection = connections[db]
      File "C:\Python34\lib\site-packages\django\db\utils.py", line 234, in __getite
    m__
        if hasattr(self._connections, alias):
    TypeError: hasattr(): attribute name must be string
    


Answer: Here is your problem:

<https://github.com/bernardopires/django-tenant-schemas/issues/252>

DTS still does not work with django 1.8, but here is a fork that has the
changed stuff.

<https://github.com/tomturner/django-tenant-
schemas/commit/fe437f7c81af8484614b3dcdaeb7ad5c43249f54>

Looks like it works with 1.7 and 1.8, but I haven't tested.

Since I'm starting out a new project, I'll probably downgrade django for a
while.

