Django生成数据库脚本修改后台显示object

models.py
from django.db import models


# Create your models here.

class Student(models.Model):
    username = models.CharField(max_length=30, unique=True)
    password = models.CharField(max_length=30)

    def __unicode__(self):
        return u'Student:%s' % self.username

    # 修改后台显示object
    def __str__(self):
        return u'Student:%s' % self.username


class Movie(models.Model):
    mname = models.CharField(max_length=255)
    mdesc = models.CharField(max_length=255)
    mimg = models.CharField(max_length=255)

    # 修改后台显示object
    def __str__(self):
        return u'Movie:%s' % self.mname

python manage.py

makemigrations 生成数据库脚本（迁移文件）
migrate 同步数据库 这个和makemigrations是做数据库迁移，每次数据库有更改或者model有更改都需要操作