Activate the django application

In order for Django to track the application and at the same time create a data table for its model, we need to activate it. For this, you can edit the settings.py file and add xx.apps.xxxxConfig to the INSTALLED_APPS setting.
Among them: xx: refers to the application name under the project (the name created by the startapp command), xxxx: refers to the project name, as shown below:

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',  
    'blog.apps.BlogConfig',     # 激活应用程序
]

It is not recommended to write the following (write the application name directly):

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles', 
    'blog',     # 激活应用程序

The xxxxConfig class defines the configuration content of the application. Currently, Django understands that the application is active for the project and can load its models.