Django-数据模型

• 修改model.py文件

• from django.db import models
  
  # Create your models here.
  
  class Question(models.Model):
      question_text = models.CharField(max_length=200)
      pub_date = models.DateTimeField('date published')
  
  class Choice(models.Model):
      question = models.ForeignKey(Question)
      choice_text = models.CharField(max_length=200)
      votes = models.IntegerField(default=0)

• 生成合并数据脚本:python manage.py makemigrations

• ➜  mysite  python manage.py makemigrations polls
  Migrations for 'polls':
    0001_initial.py:
      - Create model Choice
      - Create model Question
      - Add field question to choice

• 应用改变到数据库中：python manage.py migrate

• ➜  mysite  python manage.py migrate
  Operations to perform:
    Synchronize unmigrated apps: staticfiles, messages
    Apply all migrations: admin, contenttypes, polls, auth, sessions
  Synchronizing apps without migrations:
    Creating tables...
      Running deferred SQL...
    Installing custom SQL...
  Running migrations:
    Rendering model states... DONE
    Applying polls.0001_initial... OK