订单刷播放项目的回顾

本项目来自武沛齐的教学实战，博主做一下回顾与分享。

表结构设计

abstract类

django中orm自定义的

from django.db import models


class ActiveBaseModel(models.Model):
    active = models.SmallIntegerField(verbose_name="状态", default=1, choices=((1, "激活"), (0, "删除"),))

    class Meta:
        abstract = True


class Administrator(ActiveBaseModel):
    """ 管理员表 """
    username = models.CharField(verbose_name="用户名", max_length=32, db_index=True)
    password = models.CharField(verbose_name="密码", max_length=64)
    mobile = models.CharField(verbose_name="手机号", max_length=11, db_index=True)
    create_date = models.DateTimeField(verbose_name="创建日期", auto_now_add=True)

物理删除&&逻辑删除

      class Administrator(model.Model):
            """ 管理员表 """
            username = models.CharField(verbose_name="用户名", max_length=32, db_index=True)
            password = models.CharField(verbose_name="密码", max_length=64)
            active = models.SmallIntegerField(verbose_name="状态", default=1, choices=((1, "激活"), (0, "删除"),))

        # 物理删除,你就真把东西删除完了
            queryset = models.Administrator.objects.all()
            models.Administrator.objects.filter(id=10).delete()

        # 逻辑删除，实际上数据还在，依旧可以恢复
            queryset = models.Administrator.objects.filter(active=1)
            models.Administrator.objects.filter(id=10).update(active=0)

自增和主键

DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'


class Administrator(model.Model):
    """ 管理员表 """
    #比如自动创建id
    id = models.BigAutoField(primary_key=True)  #其实是数据库的类型 long
    bid = models.AutoField(primary_key=True) #int
    xid = models.SmallAutoField(primary_key=True)  #tiny int
    username = models.CharField(verbose_name="用户名", max_length=32, db_index=True)
    password = models.CharField(verbose_name="密码", max_length=64)

具体设计

from django.db import models


class ActiveBaseModel(models.Model):
    active = models.SmallIntegerField(verbose_name="状态", default=1, choices=((1, "激活"), (0, "删除"),))

    class Meta:
        abstract = True


class Administrator(ActiveBaseModel):
    """ 管理员表 """
    #db_index是在用索引查询，所谓索引查询等价于创建了一个文件B+树的算法来查询
    username = models.CharField(verbose_name="用户名", max_length=32, db_index=True)
    password = models.CharField(verbose_name="密码", max_length=64)
    mobile = models.CharField(verbose_name="手机号", max_length=11, db_index=True)
    create_date = models.DateTimeField(verbose_name="创建日期", auto_now_add=True)


class Level(ActiveBaseModel):
    """ 级别表 """
    title = models.CharField(verbose_name="标题", max_length=32)
    percent = models.IntegerField(verbose_name="折扣", help_text="填入0-100整数表示百分比，例如：90，表示90%")

    def __str__(self):
        return self.title


class Customer(ActiveBaseModel):
    """ 客户表 """
    username = models.CharField(verbose_name="用户名", max_length=32, db_index=True)
    password = models.CharField(verbose_name="密码", max_length=64)
    mobile = models.CharField(verbose_name="手机号", max_length=11, db_index=True)
    # mobile = models.CharField(verbose_name="手机号", max_length=11, db_index=True, validators=[RegexValidator(r'^\d{11}$', '手机号格式错误'), ], )
    #DecimalField表示十进制数，方便存储，更为精准
    balance = models.DecimalField(verbose_name="账户余额", default=0, max_digits=10, decimal_places=2)
    level = models.ForeignKey(verbose_name="级别", to="Level", on_delete=models.CASCADE)
    # level = models.ForeignKey(verbose_name="级别", to="Level", on_delete=models.CASCADE, limit_choices_to={'active': 1})
    create_date = models.DateTimeField(verbose_name="创建日期", auto_now_add=True)
    #on_delete=models.CASCADE。是为了解决特殊情况下的问题，假如有一个部门表，员工表关联了部门表。假如删除部门表的一个部门
    #对应的员工表全部干掉。
    #models.set_NULL。也可以置为空(blank=True, null=true)
    #model.set_defalut 设为默认值。
    #model.protected   受保护，提示报错。可以手动转移数据。
    creator = models.ForeignKey(verbose_name="创建者", to="Administrator", on_delete=models.CASCADE)


class PricePolicy(models.Model):
    """ 价格策略（原价，后续可以根据用级别不同做不同折扣）
    1  1000 10
    2  2000 18
    """
    count = models.IntegerField(verbose_name="数量")
    price = models.DecimalField(verbose_name="价格", default=0, max_digits=10, decimal_places=2)


class Order(ActiveBaseModel):
    """ 订单表 """
    status_choices = (
        (1, "待执行"),
        (2, "正在执行"),
        (3, "已完成"),
        (4, "失败"),
        (5, "已撤单"),
    )
    status = models.SmallIntegerField(verbose_name="状态", choices=status_choices, default=1)

    # 202211022123123123
    oid = models.CharField(verbose_name="订单号", max_length=64, unique=True)
    url = models.URLField(verbose_name="视频地址", db_index=True)
    count = models.IntegerField(verbose_name="数量")

    price = models.DecimalField(verbose_name="价格", default=0, max_digits=10, decimal_places=2)
    real_price = models.DecimalField(verbose_name="实际价格", default=0, max_digits=10, decimal_places=2)

    old_view_count = models.CharField(verbose_name="原播放量", max_length=32, default="0")

    create_datetime = models.DateTimeField(verbose_name="创建时间", auto_now_add=True)
    customer = models.ForeignKey(verbose_name="客户", to="Customer", on_delete=models.CASCADE)
    memo = models.TextField(verbose_name="备注", null=True, blank=True)


class TransactionRecord(ActiveBaseModel):
    """ 交易记录 """
    charge_type_class_mapping = {
        1: "success",
        2: "danger",
        3: "default",
        4: "info",
        5: "primary",
    }
    charge_type_choices = ((1, "充值"), (2, "扣款"), (3, "创建订单"), (4, "删除订单"), (5, "撤单"),)
    charge_type = models.SmallIntegerField(verbose_name="类型", choices=charge_type_choices)

    customer = models.ForeignKey(verbose_name="客户", to="Customer", on_delete=models.CASCADE)
    amount = models.DecimalField(verbose_name="金额", default=0, max_digits=10, decimal_places=2)

    creator = models.ForeignKey(verbose_name="管理员", to="Administrator", on_delete=models.CASCADE, null=True, blank=True)

    order_oid = models.CharField(verbose_name="订单号", max_length=64, null=True, blank=True, db_index=True)
    create_datetime = models.DateTimeField(verbose_name="交易时间", auto_now_add=True)
    memo = models.TextField(verbose_name="备注", null=True, blank=True)

开始项目

#settings.py
DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': 'my_djpro',  # 数据库名字
        'USER': 'root',
        'PASSWORD': 'root123',
        'HOST': '127.0.0.1',  # 那台机器安装了MySQL
        'PORT': 3306,
    }
}

python manage.py makemigrations
python manage.py migrate

缓存和Session

windows这里可以自行必应搜索安装

pip install django-redis

#settings.py
CACHES = {
    "default": {
        "BACKEND": "django_redis.cache.RedisCache",
        "LOCATION": "redis://127.0.0.1:6379",
        "OPTIONS": {
            "CLIENT_CLASS": "django_redis.client.DefaultClient",
            "CONNECTION_POOL_KWARGS": {"max_connections": 100},
            "PASSWORD": "qwe123",
            # 'MAX_ENTRIES': 300,  # 最大缓存个数（默认300）
            # 'CULL_FREQUENCY': 3,  # 缓存到达最大个数之后，剔除缓存个数的比例，即：1/CULL_FREQUENCY（默认3）
        }
    }
}

认证，动态菜单，权限控制

简单来说，各个身份的人看到的菜单应该不同。