Reverse database table database table generated Django ORM inspectdb reverse generation (ii) Django ORM inspectdb

Reverse generating database table (b) Django ORM inspectdb

Here we begin to say how reverse mysql model to generate code in django. 

Before we show django ORM in reverse to generate, let's talk about how to forward the generated code.

Forward generation, refers to create model.py file, and then django built-in compiler, such as creating a database table in the mysql in line with model.py.

Reverse generated, referring to Table create the database, then the built-django compiler generates a model code.

 

1, ready to work

Create a django project and app

Create a django project name is helloworld

django-admin.py startproject helloworld

Creating app, the name test

python manage.py startapp hello  

Configuration database

Configuring the app in INSTALLED_APPS settings.py

# Application definition  
  
INSTALLED_APPS = [  
    'django.contrib.admin',  
    'django.contrib.auth',  
    'django.contrib.contenttypes',  
    'django.contrib.sessions',  
    'django.contrib.messages',  
    'django.contrib.staticfiles',  
    'hello',  
]  

Configuration database in settings.py

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': 'big_data',
        'USER': 'root',
        'PASSWORD': '1234',
        'HOST': '10.93.84.53',
        'PORT': '3306',
    }
}

 

2, the forward generation

Model.py created in the directory hello app

from django.db import models
class AlarmGroup(models.Model):

group_name = models.CharField(primary_key=True, max_length=250)

group_des = models.TextField(blank=True, null=True)

members = models.TextField(blank=True, null=True)

timestamp = models.DateTimeField()

Run forward generation

python manage.py makemigrations 
python manage.py migrate

Can go to the configuration database, view the successful creation of the table

 

3, the reverse generated

Now create tables in the database

CREATE TABLE `alarm_group` (
  `group_name` varchar(250) NOT NULL,
  `group_des` blob,
  `members` blob,
  `timestamp` datetime NOT NULL,
  `on_duty` blob,
  `leader` blob,
  PRIMARY KEY (`group_name`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8

Then execute the command, the code generating model.py

python manage.py inspectdb

Model.py generated code as follows

class AlarmGroup(models.Model):
    group_name = models.CharField(primary_key=True, max_length=250)
    group_des = models.TextField(blank=True, null=True)
    members = models.TextField(blank=True, null=True)
    timestamp = models.DateTimeField()
class Meta:

managed = False

db_table = 'alarm_group'

There's db_table mapping table name in the database.