Django Notes V: Writing models

Models in fact, there is nothing to say, is the ordinary Python class

Configuring database connections in Settings

DATABASES = {    'default': {        'ENGINE':'Django.db.backends.mysql',        'NAME':'MyDB',        'USER':'Root',        'PASSWORD':"',        'HOST':'127.0.0.1',        'PORT':'3306',    }}

Define your own models.

classUser (models. Model):classMeta:verbose_name= u'User'verbose_name_plural= u'User'db_table='User'user_name= Models. Charfield (verbose_name=u'User name', max_length=100) Pass_word= Models. Charfield (verbose_name=u'Password', max_length=100)    def __str(self):returnSelf.user_nameclassarticle (models. Model):classMeta:verbose_name= u'article'verbose_name_plural= u'article'db_table='article'title= Models. Charfield (verbose_name=u'title', max_length=200) Content= Models. TextField (verbose_name=u'content') Create_time= Models. Datetimefield (verbose_name=u'creation Time', auto_now_add=True) last_modified= Models. Datetimefield (verbose_name=u'Last Modified Time', auto_now=True)def __str__(self):returnSelf.titleclassComment (models. Model):classMeta:verbose_name= u'Reviews'verbose_name_plural= u'Reviews'db_table='Comment'content= Models. TextField (verbose_name=u'Comment Content') Article= Models. ForeignKey (article, verbose_name='article') User= Models. ForeignKey (User, Verbose_name=u'Comment Person')    def __str__(self):returnSELF.CONTENT[0:20]

Execute Migrate Build database table

Python manage.py Makemigrationspython manage.py Migrate

Python manage.py sqlmigrate app_name Migrate_file_name can display the generated SQL

Other details, as well as how to configure multi-operation multi-database, etc., directly refer to the official documents on the line.

There are mysqldb do not support Python3, Python3 please use Pymysql

Just put the following two sentences in your app's __init__.py.

Import pymysqlpymysql.install_as_mysqldb ()

Django Notes V: Writing models