django models建立问题

Question

1.系统环境：python2.7.3 django 1.10.3 ubutu12.04 mysql 5.5.3

2.问题：在使用django的models建立表，

1)models内容：

 class Test(models.Model):
 name = models.CharField(max_length=20)
 score = models.IntegerField(default=0)
 date = models.DateField()
 def __unicode__(self):
     return u'%s %d %s' % (self.name,self.score,self.date)

 class User(models.Model):
 username = models.CharField(max_length=20)
 passwd = models.CharField(max_length=20)
 def __unicode__(self):
     return u'%s %s' % (self.name,self.passwd)

 class info(models.Model):
 address= models.CharField(max_length=20)
 phone = models.CharField(max_length=20)
 def __unicode__(self):
     return u'%s %s' % (self.address,self.phone)

2)执行建表语句后回显：

   root@precise32:/usr/local/frist_django# python manage.py makemigrations
   Migrations for 'testdb':
   testdb/migrations/0001_initial.py:
   - Create model info
   - Create model Test
   - Create model User

3）此时数据库中应该有这三张表，但是数据库中只有第一个表

 mysql> show tables;

Tables_in_django
testdb_test

4）但是在初始化文件中也是有三张表的建立语句。

   class Migration(migrations.Migration):

    initial = True

    dependencies = [
    ]

    operations = [
        migrations.CreateModel(
            name='info',
            fields=[
                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                ('address', models.CharField(max_length=20)),
                ('phone', models.CharField(max_length=20)),
            ],
        ),
        migrations.CreateModel(
            name='Test',
            fields=[
                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                ('name', models.CharField(max_length=20)),
                ('score', models.IntegerField(default=0)),
                ('date', models.DateField()),
            ],
        ),
        migrations.CreateModel(
            name='User',
            fields=[
                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                ('username', models.CharField(max_length=20)),
                ('passwd', models.CharField(max_length=20)),
            ],
        ),
    ]

新看django，这是怎么回事，为什么只有一个表被建了呢？求大神解释一下。