doraemon of python (major update) django static configuration file (error in many places)

# Using static files ## 12.2 

# ### 12.2.1 static files to configure and use 

the settings.py 

`` `Python 
STATIC_URL = ' / static / '   # Aliases 
STATICFILES_DIRS = [ 
    the os.path.join (base_dir, ' static ' ), 
    os.path.join (base_dir, ' static1 ' ), 
    os.path.join (base_dir, ' static2 ' ) 
    
] 
`` ` 

placed in the static folder static file, it should look like this: ` 

`` HTML
 <Link the rel = " this stylesheet " the href = " / static / CSS / Login / CSS "
// Note: No matter what the name is called static files, static files need to find the post, using the alias, not the real name of the folder 
      in the order of the list to find 
`` ` 

# ### 12.2.2 Simple examples of login 

issues form form submission data Note: the

 boycott action 1. submitted = "" request method = Method, " POST " 
2 . All input boxes have the name attribute
 3. there are a = input box of the type " the submit " or there is a button 

Note: submit post data request, the settings in MIDDLEWARE of ' django.middleware.csrf.CsrfViewMiddleware ' commented 

# ### 12.2.3 App 

App:

 - admin.py    # Django Admin tools 
- modles.py   # associated with ORM 
- views.py # write function

Creating APP:

 - command line python manage.py startapp app name
 - PyCharm: Tools -> RUN manage.py Task -> startapp App Name 

Registration APP: 

`` `Python 
INSTALLED_APPS = [ 
    ... 
    ' app01 ' ,
     ' app01 .apps.App01Config ' ,   # recommended wording 
] 
`` ` 

# ### 12.2.4 ORM 

Django processes used in MySQL database:

 1 create a MySQL database

 2 configuration settings in, Django links MySQL database:

 3 .' Python `` 
   DATABASES = { 
       default: { 
           ' ENGINE ' :' Django.db.backends.mysql ' ,    # engine 
           ' NAME ' : ' day53 ' ,              # database name 
           ' HOST ' : ' 127.0.0.1 ' ,         # ip address 
           ' PORT ' : 3306,         # port 
           ' the USER ' : ' root '       # users 
           ' PASSWORD ' : ' 123 '    # Password 
       }  
   }
   `` `

4 . In the init file and directory at the same level settings wrote:

 5 . `` `Python
    Import pymysql 
   pymysql.install_as_MySQLdb () 
   ` ``

 6 Create a table (written under the app models.py class):

 7 . Python `` `
    from django.db Import Models 
   
   class the User (models.Model): 
       username = models.CharField (MAX_LENGTH = 32)     # username VARCHAR (32) 
       password = models.CharField (MAX_LENGTH = 32)      # password VARCHAR (32) 
   `` `

 8 . commands to perform database migration

    1. Python manage.py makemigrations   # detection model.py registered under each model's change history record app
   The migrate Python manage.py 2.   # synchronize changes to the database record 

orm operation 

`` `Python 
# acquired all the data in the table 
RET = models.User.objects.all ()    # QuerySet that the object list [Object] 
# Gets an object ( there and only) 
obj = models.User.objects.get (username = ' Alex ' )    # not obtain or acquire a plurality of given objects 
# acquired object satisfying the condition 
ret = models.User.objects.filter (username = ' Alex ' , password = ' ASD ' )    # QuerySet that Object list 
`