如何向 django 模型添加新字段？

我正在创建一个新的 Django 应用程序。所以我在训练。
描述竞争模式

class Competition(models.Model):
    title = models.CharField(max_length=200)
    slug = models.SlugField(max_length=200, unique=True)

    def __str__(self):
        return self.title

做了迁移和所有这些。
然后我意识到应该在模型中再添加一个字段。

class Competition(models.Model):
    title = models.CharField(max_length=200)
    slug = models.SlugField(max_length=200, unique=True)
    event_place = models.CharField(max_length=200)

    def __str__(self):
        return self.title

我创建迁移 -python manage.py makemigrations
我执行迁移 -python manage.py migrate
但在表中未创建新字段。
如何向数据库中添加新字段？数据库 - SQLite。姜戈 2.0

迁移文件的内容

# Generated by Django 2.0 on 2017-12-15 06:15

from django.conf import settings
from django.db import migrations, models
import django.db.models.deletion


class Migration(migrations.Migration):

    dependencies = [
        ('contenttypes', '0002_remove_content_type_name'),
        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
        ('competitions', '0001_initial'),
    ]

    operations = [
        migrations.CreateModel(
            name='Competition',
            fields=[
                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                ('title', models.CharField(max_length=200)),
                ('slug', models.SlugField(max_length=200, unique=True)),
                ('event_place', models.CharField(max_length=200)),
            ],
    ]

结论python manage.py showmigrations

admin
 [X] 0001_initial
 [X] 0002_logentry_remove_auto_add
auth
 [X] 0001_initial
 [X] 0002_alter_permission_name_max_length
 [X] 0003_alter_user_email_max_length
 [X] 0004_alter_user_username_opts
 [X] 0005_alter_user_last_login_null
 [X] 0006_require_contenttypes_0002
 [X] 0007_alter_validators_add_error_messages
 [X] 0008_alter_user_username_max_length
 [X] 0009_alter_user_last_name_max_length
competitions
 [X] 0001_initial
 [ ] 0002_auto_20171215_0915
contenttypes
 [X] 0001_initial
 [X] 0002_remove_content_type_name
home
 (no migrations)
sessions
 [X] 0001_initial