标签：异步 verbose name 课程 2022 07 课程表 id 14

一、双写一致性之定时更新

任务逻辑

@app.task
def update_banner():
    # 查询数据库，拿到所有轮播图，序列化后，放到缓存中
    banner_list = Banner.objects.all().filter(is_delete=False, is_show=True).order_by('orders')[:settings.BANNER_COUNT]
    ser = BannerSerializer(instance=banner_list, many=True)
    # 如果在视图类，做序列化，因为视图类有request对象，
    # 所以向图像这种，会自动加前面的地址
    for item in ser.data:
        # print(ser.data)
        print(1111)
        item['image'] = settings.BACKEND_URL + item['image']
    cache.set('home_banner_list', ser.data)
    return True

二、异步发送短信

视图函数

@action(methods=['GET'], detail=False)
def send_sms(self, request, *args, **kwargs):
    mobile = request.query_params.get('mobile', None)
    code = get_code()  # 把code存起来，放到缓存中，目前在内存，后期换别的
    cache.set('send_sms_code_%s' % mobile, code)
    if mobile:
        # 开启一个线程，执行发送短信
        # t = Thread(target=send_sms_by_mobile, args=[mobile, code])
        # t.start()
        # 提交异步任务---》异步发送
        res = send_sms.delay(mobile,code)
        print(res)
        return APIResponse(msg='短信已发送')
    raise APIException('手机号没有携带')

任务

from libs.send_tx_sms import send_sms_by_mobile
@app.task
def send_sms(mobile, code):
    res=send_sms_by_mobile(mobile,code)
    if res:
        return '%s的短信发送成功，验证码是%s'%(mobile,code)
    else:
        return '%s的短信发送失败'%mobile

三、异步秒杀逻辑前后端

1.1 前端 Sckill.vue

<template>
  <div>
    <h2>go语言从入门到放弃</h2>
    <el-button type="danger" @click="handleSckill">秒杀</el-button>

  </div>
</template>

<script>
export default {
  name: "Sckill",
  data() {
    return {
      t: null,
      task_id: '',
    }
  },
  methods: {
    handleSckill() {
      this.$axios.post(`${this.$settings.BASE_URL}user/sckill/`, {
        name: "性感帽子",
      }).then(res => {
        if (res.data.code == 100) {
          alert('您正在排队')
          this.task_id = res.data.task_id
          // 起个转圈的东西
          // 起定时任务
          this.t = setInterval(() => {
            this.$axios.get(`${this.$settings.BASE_URL}user/sckill/?task_id=${this.task_id}`).then(res => {
              if (res.data.code == 100 || res.data.code == 101) {
                this.$message(res.data.msg)
                //销毁定时器
                clearInterval(this.t)
                this.t = null
              } else {
                console.log('过会再查')
              }
            })
          }, 3000)
        }
      })
    }
  }
}
</script>

<style scoped>

</style>

视图类

from celery_task.user_task import sckill_goods
from celery_task.celery import app
from celery.result import AsyncResult


class SckillView(APIView):
    def post(self, request, *args, **kwargs):
        name = request.data.get('name')
        # 提交秒杀异步任务
        res = sckill_goods.delay(name)
        return APIResponse(task_id=str(res))

    def get(self, request, *args, **kwargs):
        task_id = request.GET.get('task_id')
        a = AsyncResult(id=task_id, app=app)
        if a.successful():  # 正常执行完成
            result = a.get()  # 任务返回的结果
            if result:
                return APIResponse(code=100, msg='秒杀成功')
            else:
                return APIResponse(code=101, msg='秒杀失败')
        elif a.status == 'STARTED':
            print('任务已经开始被执行')
            return APIResponse(code=103, msg='还在排队')
        else:
            return APIResponse(code=102, msg='没成功')

路由

urlpatterns = [
    path('sckill/', SckillView.as_view()),
]

任务

@app.task
def sckill_goods(name):
    # 逻辑是：开启事务---》扣减库存---》生成订单
    import time
    time.sleep(6)
    res = random.choice([100, 102])
    if res == 100:
        print('%s被秒杀成功了' % name)
        return True
    else:
        print('%s被秒杀失败了' % name)
        return False

四、课程相关表分析

# 表分析
	-课程分类表：id，分类名，继承BaseModel
    	-跟课程表是一对多，一个分类下有很多课程
    -课程表（实战课课表）
    	-如果一个表：
        	-不同课程直接，字段可能不一样
        -多个课程，多个表
        	-只写实战课这条线
    -章节表：
    	跟课程是一对多
    -课时表
    	跟章节是一对多
    -老师表
    	-跟课程一对多
        
        
        
# 表的关联关系---》公司中外键都是逻辑外键，不建物理外键
	-靠一个东西建立出来的三种关系----》外键
        -一对一 
        -一对多
        -多对多
        
        图书  作者 多对多
        图书表
        id  name   price
        1    xx     33
        2    yy     32
        
        作者
       id  name       addr
        1    多对     上海
        2    大师傅     北京
        
        中间表
        id  book_id   auth_id
        1   1            1
        2   1            2
        3   2            1

先创建一个course.app

表数据

from django.db import models

from utils.common_models import BaseModel


# 课程分类
class CourseCategory(BaseModel):
    """分类   id   name """
    name = models.CharField(max_length=64, unique=True, verbose_name="分类名称")

    class Meta:
        db_table = "luffy_course_category"
        verbose_name = "课程分类"
        verbose_name_plural = verbose_name

    def __str__(self):
        return "%s" % self.name


# 课程表
class Course(BaseModel):
    """课程"""
    course_type = (
        (0, '付费'),
        (1, 'VIP专享'),
    )
    level_choices = (
        (0, '初级'),
        (1, '中级'),
        (2, '高级'),
    )
    status_choices = (
        (0, '上线'),
        (1, '下线'),
        (2, '预上线'),
    )
    name = models.CharField(max_length=128, verbose_name="课程名称")
    course_img = models.ImageField(upload_to="courses", max_length=255, verbose_name="封面图片", blank=True, null=True)
    course_type = models.SmallIntegerField(choices=course_type, default=0, verbose_name="付费类型")
    brief = models.TextField(max_length=2048, verbose_name="详情介绍", null=True, blank=True)
    level = models.SmallIntegerField(choices=level_choices, default=0, verbose_name="难度等级")
    pub_date = models.DateField(verbose_name="发布日期", auto_now_add=True)
    period = models.IntegerField(verbose_name="建议学习周期(day)", default=7)
    attachment_path = models.FileField(upload_to="attachment", max_length=128, verbose_name="课件路径", blank=True,
                                       null=True)
    status = models.SmallIntegerField(choices=status_choices, default=0, verbose_name="课程状态")
    students = models.IntegerField(verbose_name="学习人数", default=0)  # 优化字段
    sections = models.IntegerField(verbose_name="总课时数量", default=0)
    pub_sections = models.IntegerField(verbose_name="课时更新数量", default=0)
    price = models.DecimalField(max_digits=6, decimal_places=2, verbose_name="课程原价", default=0)

    teacher = models.ForeignKey("Teacher", on_delete=models.DO_NOTHING, null=True, blank=True, verbose_name="授课老师")
    course_category = models.ForeignKey("CourseCategory", on_delete=models.SET_NULL, db_constraint=False, null=True,
                                        blank=True, verbose_name="课程分类")

    class Meta:
        db_table = "luffy_course"
        verbose_name = "课程"
        verbose_name_plural = "课程"

    def __str__(self):
        return "%s" % self.name


# 章节
class CourseChapter(BaseModel):
    """章节"""
    '''
    基于对象的跨表查询：正：字段        反：表名小写（一对一是  表名小写，一对多   表名小写_set.all()）
        -related_name='coursechapters'   基于对象跨表查反向查询，替换表名小写
    基于双下划线的连表查询：正：字段    反：表名小写
        -related_query_name='xxx'     基于连表查反向查询，替换表名小写

    '''
    # related_name='coursechapters'
    course = models.ForeignKey("Course", related_name='coursechapters', on_delete=models.CASCADE, verbose_name="课程名称")
    chapter = models.SmallIntegerField(verbose_name="第几章", default=1)
    name = models.CharField(max_length=128, verbose_name="章节标题")
    summary = models.TextField(verbose_name="章节介绍", blank=True, null=True)
    pub_date = models.DateField(verbose_name="发布日期", auto_now_add=True)

    class Meta:
        db_table = "luffy_course_chapter"
        verbose_name = "章节"
        verbose_name_plural = verbose_name

    def __str__(self):
        return "%s:(第%s章)%s" % (self.course, self.chapter, self.name)


# 课时
class CourseSection(BaseModel):
    """课时"""
    section_type_choices = (
        (0, '文档'),
        (1, '练习'),
        (2, '视频')
    )
    chapter = models.ForeignKey("CourseChapter", related_name='coursesections', on_delete=models.CASCADE,
                                verbose_name="课程章节")
    name = models.CharField(max_length=128, verbose_name="课时标题")
    section_type = models.SmallIntegerField(default=2, choices=section_type_choices, verbose_name="课时种类")
    section_link = models.CharField(max_length=255, blank=True, null=True, verbose_name="课时链接",
                                    help_text="若是video，填vid,若是文档，填link")
    duration = models.CharField(verbose_name="视频时长", blank=True, null=True, max_length=32)  # 仅在前端展示使用
    pub_date = models.DateTimeField(verbose_name="发布时间", auto_now_add=True)
    free_trail = models.BooleanField(verbose_name="是否可试看", default=False)

    class Meta:
        db_table = "luffy_course_section"
        verbose_name = "课时"
        verbose_name_plural = verbose_name

    def __str__(self):
        return "%s-%s" % (self.chapter, self.name)


# 老师表
class Teacher(BaseModel):
    """导师"""
    role_choices = (
        (0, '讲师'),
        (1, '导师'),
        (2, '班主任'),
    )
    name = models.CharField(max_length=32, verbose_name="导师名")
    role = models.SmallIntegerField(choices=role_choices, default=0, verbose_name="导师身份")
    title = models.CharField(max_length=64, verbose_name="职位、职称")
    signature = models.CharField(max_length=255, verbose_name="导师签名", help_text="导师签名", blank=True, null=True)
    image = models.ImageField(upload_to="teacher", null=True, verbose_name="导师封面")
    brief = models.TextField(max_length=1024, verbose_name="导师描述")

    class Meta:
        db_table = "luffy_teacher"
        verbose_name = "导师"
        verbose_name_plural = verbose_name

    def __str__(self):
        return "%s" % self.name

迁移表

六、课程表数据录入

# 把sql执行
# 把 media文件夹下的图片放到对应位置


INSERT INTO luffy_teacher(id, orders, is_show, is_delete, created_time, updated_time, name, role, title, signature, image, brief) VALUES (1, 1, 1, 0, '2022-07-14 13:44:19.661327', '2022-07-14 13:46:54.246271', 'Alex', 1, '老男孩Python教学总监', '金角大王', 'teacher/alex_icon.png', '老男孩教育CTO & CO-FOUNDER 国内知名PYTHON语言推广者 51CTO学院2016\2017年度最受学员喜爱10大讲师之一 多款开源软件作者 曾任职公安部、飞信、中金公司、NOKIA中国研究院、华尔街英语、ADVENT、汽车之家等公司');

INSERT INTO luffy_teacher(id, orders, is_show, is_delete, created_time, updated_time, name, role, title, signature, image, brief) VALUES (2, 2, 1, 0, '2022-07-14 13:45:25.092902', '2022-07-14 13:45:25.092936', 'Mjj', 0, '前美团前端项目组架构师', NULL, 'teacher/mjj_icon.png', '是马JJ老师, 一个集美貌与才华于一身的男人，搞过几年IOS，又转了前端开发几年，曾就职于美团网任高级前端开发，后来因为不同意王兴(美团老板)的战略布局而出家做老师去了，有丰富的教学经验，开起车来也毫不含糊。一直专注在前端的前沿技术领域。同时，爱好抽烟、喝酒、烫头(锡纸烫)。 我的最爱是前端，因为前端妹子多。');

INSERT INTO luffy_teacher(id, orders, is_show, is_delete, created_time, updated_time, name, role, title, signature, image, brief) VALUES (3, 3, 1, 0, '2022-07-14 13:46:21.997846', '2022-07-14 13:46:21.997880', 'Lyy', 0, '老男孩Linux学科带头人', NULL, 'teacher/lyy_icon.png', 'Linux运维技术专家，老男孩Linux金牌讲师，讲课风趣幽默、深入浅出、声音洪亮到爆炸');


-- 分类表
INSERT INTO luffy_course_category(id, orders, is_show, is_delete, created_time, updated_time, name) VALUES (1, 1, 1, 0, '2022-07-14 13:40:58.690413', '2022-07-14 13:40:58.690477', 'Python');

INSERT INTO luffy_course_category(id, orders, is_show, is_delete, created_time, updated_time, name) VALUES (2, 2, 1, 0, '2022-07-14 13:41:08.249735', '2022-07-14 13:41:08.249817', 'Linux');


-- 课程表
INSERT INTO luffy_course(id, orders, is_show, is_delete, created_time, updated_time, name, course_img, course_type, brief, level, pub_date, period, attachment_path, status, students, sections, pub_sections, price, course_category_id, teacher_id) VALUES (1, 1, 1, 0, '2022-07-14 13:54:33.095201', '2022-07-14 13:54:33.095238', 'Python开发21天入门', 'courses/alex_python.png', 0, 'Python从入门到入土&&&Python从入门到入土&&&Python从入门到入土&&&Python从入门到入土&&&Python从入门到入土&&&Python从入门到入土&&&Python从入门到入土&&&Python从入门到入土&&&Python从入门到入土&&&Python从入门到入土&&&Python从入门到入土&&&Python从入门到入土', 0, '2022-07-14', 21, '', 0, 231, 120, 120, 0.00, 1, 1);

INSERT INTO luffy_course(id, orders, is_show, is_delete, created_time, updated_time, name, course_img, course_type, brief, level, pub_date, period, attachment_path, status, students, sections, pub_sections, price, course_category_id, teacher_id) VALUES (2, 2, 1, 0, '2022-07-14 13:56:05.051103', '2022-07-14 13:56:05.051142', 'Python项目实战', 'courses/mjj_python.png', 0, '', 1, '2022-07-14', 30, '', 0, 340, 120, 120, 99.00, 1, 2);

INSERT INTO luffy_course(id, orders, is_show, is_delete, created_time, updated_time, name, course_img, course_type, brief, level, pub_date, period, attachment_path, status, students, sections, pub_sections, price, course_category_id, teacher_id) VALUES (3, 3, 1, 0, '2022-07-14 13:57:21.190053', '2022-07-14 13:57:21.190095', 'Linux系统基础5周入门精讲', 'courses/lyy_linux.png', 0, '', 0, '2022-07-14', 25, '', 0, 219, 100, 100, 39.00, 2, 3);


-- 章节表
INSERT INTO luffy_course_chapter(id, orders, is_show, is_delete, created_time, updated_time, chapter, name, summary, pub_date, course_id) VALUES (1, 1, 1, 0, '2022-07-14 13:58:34.867005', '2022-07-14 14:00:58.276541', 1, '计算机原理', '', '2022-07-14', 1);

INSERT INTO luffy_course_chapter(id, orders, is_show, is_delete, created_time, updated_time, chapter, name, summary, pub_date, course_id) VALUES (2, 2, 1, 0, '2022-07-14 13:58:48.051543', '2022-07-14 14:01:22.024206', 2, '环境搭建', '', '2022-07-14', 1);

INSERT INTO luffy_course_chapter(id, orders, is_show, is_delete, created_time, updated_time, chapter, name, summary, pub_date, course_id) VALUES (3, 3, 1, 0, '2022-07-14 13:59:09.878183', '2022-07-14 14:01:40.048608', 1, '项目创建', '', '2022-07-14', 2);

INSERT INTO luffy_course_chapter(id, orders, is_show, is_delete, created_time, updated_time, chapter, name, summary, pub_date, course_id) VALUES (4, 4, 1, 0, '2022-07-14 13:59:37.448626', '2022-07-14 14:01:58.709652', 1, 'Linux环境创建', '', '2022-07-14', 3);


-- 课时表
INSERT INTO luffy_course_Section(id, is_show, is_delete, created_time, updated_time, name, orders, section_type, section_link, duration, pub_date, free_trail, chapter_id) VALUES (1, 1, 0, '2022-07-14 14:02:33.779098', '2022-07-14 14:02:33.779135', '计算机原理上', 1, 2, NULL, NULL, '2022-07-14 14:02:33.779193', 1, 1);

INSERT INTO luffy_course_Section(id, is_show, is_delete, created_time, updated_time, name, orders, section_type, section_link, duration, pub_date, free_trail, chapter_id) VALUES (2, 1, 0, '2022-07-14 14:02:56.657134', '2022-07-14 14:02:56.657173', '计算机原理下', 2, 2, NULL, NULL, '2022-07-14 14:02:56.657227', 1, 1);

INSERT INTO luffy_course_Section(id, is_show, is_delete, created_time, updated_time, name, orders, section_type, section_link, duration, pub_date, free_trail, chapter_id) VALUES (3, 1, 0, '2022-07-14 14:03:20.493324', '2022-07-14 14:03:52.329394', '环境搭建上', 1, 2, NULL, NULL, '2022-07-14 14:03:20.493420', 0, 2);

INSERT INTO luffy_course_Section(id, is_show, is_delete, created_time, updated_time, name, orders, section_type, section_link, duration, pub_date, free_trail, chapter_id) VALUES (4, 1, 0, '2022-07-14 14:03:36.472742', '2022-07-14 14:03:36.472779', '环境搭建下', 2, 2, NULL, NULL, '2022-07-14 14:03:36.472831', 0, 2);

INSERT INTO luffy_course_Section(id, is_show, is_delete, created_time, updated_time, name, orders, section_type, section_link, duration, pub_date, free_trail, chapter_id) VALUES (5, 1, 0, '2022-07-14 14:04:19.338153', '2022-07-14 14:04:19.338192', 'web项目的创建', 1, 2, NULL, NULL, '2022-07-14 14:04:19.338252', 1, 3);

INSERT INTO luffy_course_Section(id, is_show, is_delete, created_time, updated_time, name, orders, section_type, section_link, duration, pub_date, free_trail, chapter_id) VALUES (6, 1, 0, '2022-07-14 14:04:52.895855', '2022-07-14 14:04:52.895890', 'Linux的环境搭建', 1, 2, NULL, NULL, '2022-07-14 14:04:52.895942', 1, 4);

七、课程主页接口

# 课程分类接口

# 查询所有课程接口
	-带过滤
    -带排序
    -带分页

视图类

from .models import CourseCategory
from rest_framework.viewsets import GenericViewSet
from rest_framework.mixins import ListModelMixin
from .serializer import CourseCategorySerializer
from utils.common_mixin import CommonListModelMixin as ListModelMixin

class CourseCategoryView(GenericViewSet, ListModelMixin):
    # 查询所有
    queryset = CourseCategory.objects.filter(is_delete=False, is_show=True).order_by('orders')
    serializer_class = CourseCategorySerializer

序列化类


class CourseCategorySerializer(serializers.ModelSerializer):
    class Meta:
        model = CourseCategory
        fields = ['id','name']

路由

from django.contrib import admin
from django.urls import path

from rest_framework.routers import SimpleRouter

router = SimpleRouter()
from .views import CourseCategoryView

router.register('category', CourseCategoryView, 'category')
urlpatterns = [

]
urlpatterns += router.urls

标签：异步,verbose,name,课程,2022,07,课程表,id,14
From： https://www.cnblogs.com/yuezongke/p/17516903.html

双写一致性之定时更新、异步发送短信、异步秒杀逻辑前后端、课程页页面前端、课程相关表分析、课程表数据录入、课程主页接口

一、双写一致性之定时更新

任务逻辑

二、异步发送短信

视图函数

任务

三、异步秒杀逻辑前后端

1.1 前端 Sckill.vue

视图类

路由

任务

四、课程相关表分析

先创建一个course.app

表数据

迁移表

六、课程表数据录入

七、课程主页接口

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