python model怎么用

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql',
        'USER':'root',
        'PASSWORD':'',
        'NAME':'djangouse',
        'HOST':'localhost',
    }
}

python manage.py migrate

from django.db import models

class Book(models.Model):
    title=models.CharField(max_length=100)
    def __unicode__(self):
        return self.title

python manage.py check  检查model是否有拼写错误
python manage.py makemigrations 将model的改变生成一个迁移文件
python manage.py migrate 执行迁移

book=Book(title="hello django")
book.save()

book=Book.objects.get(id=1)
book.delete()

book=Book.objects.all()

book=Book.objects.get(id=1)

book=Book.objects.filter(title__icontains="hello")

book=Book.objects.get(id=1)
book.title="django"
book.save()

class BookManager(models.Manager):
    def get_book_count(self,keyword):
        return self.filter(title__icontains=keyword).count()

class Book(models.Model):
    title=models.CharField(max_length=100)
    myobjects=BookManager()

count=Book.myobjects.get_book_count("hello")

class PythonManager(models.Manager):
    def get_query_set(self):
        return super(PythonManager,self).get_query_set().filter(title__icontaions='hello')

class Book(models.Model):
    title=models.CharField(max_length=100)
    myobjects=BookManager()
    pyhton_objects=PythonManager()

queryset=Book.pyhton_objects.get_query_set()

python manage.py createsuperuser