django2 连接mysql实现第一个rest framework

1.安装pymysql，mysqlclient，创建项目django-admin startproject django2

2.settings中把DataBase配置换掉

DATABASES = {
    'default': {
    'ENGINE': 'django.db.backends.mysql',
    'NAME': 'djangodb',
    'USER': 'root',
    'PASSWORD': 'XXX',
    'HOST': '127.0.0.1',
    'PORT': '3306',
    }
}

3.(Mysql5.5需要，5.6及以上不要)打开C:\Users\Administrator\AppData\Roaming\Python\Python37\site-packages\django\db\backends\mysql下的base.py，注释掉以下代码

version = Database.version_info
if version < (1, 3, 13):
    raise ImproperlyConfigured('mysqlclient 1.3.13 or newer is required; you have %s.' % Database.__version__)

4.创建一个app，python manage.py startapp myapp

在settings.py中添加一下新的app

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'myapp'
]

5.在创建的app下的models.py文件中粘帖

class Person(models.Model):
    id = models.AutoField(primary_key=True)
    name = models.CharField(max_length=30)
    age = models.IntegerField()

    def __str__(self):
        # 在Python3中使用 def __str__(self):
        return self.name

6.(Mysql5.5需要，5.6及以上不要)改一下C:\Users\Administrator\AppData\Roaming\Python\Python37\site-packages\django\db\backends\mysql下的operations.py文件，将原先的decode改为encode

if query is not None:
    query = query.decode(errors='replace')
return query

7.更新一下数据库

python manage.py makemigrations

python manage.py migrate

8.安装rest framework

9.在settings加一下

INSTALLED_APPS = [
    ...
    'rest_framework',
]

10.urls加一下

urlpatterns = [
    ...
    url(r'^api-auth/', include('rest_framework.urls'))
]

11.settings加一下

REST_FRAMEWORK = {
    # Use Django's standard `django.contrib.auth` permissions,
    # or allow read-only access for unauthenticated users.
    'DEFAULT_PERMISSION_CLASSES': [
        'rest_framework.permissions.DjangoModelPermissionsOrAnonReadOnly'
    ]
}

12.在myapp下创建文件serializers.py，粘帖如下代码：

from rest_framework import serializers

from myapp.models import Person

class PersonSerializer(serializers.ModelSerializer):
    # ModelSerializer和Django中ModelForm功能相似
    # Serializer和Django中Form功能相似
    class Meta:
        model = Person
        # 和"__all__"等价
        fields = ('id', 'name', 'age')

13.在app的views.py中粘帖如下代码：

from rest_framework import  viewsets
from myapp.models import Person
from myapp.serializers import PersonSerializer

class PersonViewSet(viewsets.ModelViewSet):
    queryset = Person.objects.all()
    serializer_class = PersonSerializer

14.在urls.py中添加

router = routers.DefaultRouter()
router.register(r'users', UserViewSet)

# Wire up our API using automatic URL routing.
# Additionally, we include login URLs for the browsable API.
urlpatterns = [
    url(r'^', include(router.urls)),
    url(r'^api-auth/', include('rest_framework.urls', namespace='rest_framework'))
]

15.运行程序