一个简易的drf的项目例子

　　　　　　　　　　　　　　luffy_city

1.项目介绍

今日内容:(路飞项目)

1 contentType组件:
    路飞学成项目，有课程，学位课（不同的课程字段不一样），价格策略

    问题，1 如何设计表结构，来表示这种规则
          　 2 为专题课，添加三个价格策略
              3 查询所有价格策略，并且显示对应的课程名称
              4 通过课程id，获取课程信息和价格策略
        
    
2 创建vue项目(目录结构介绍)
    1 node.js 安装
    2 vue脚手架:npm install -g @vue/cli
    3 vue create 项目名字
    4 用pycharm开发vue的项目
    5 项目目录结构:
        -node_modules  项目依赖
        -public      单页面开发(index是主页)
        -src   ---开发项目就跟它打交道
            -assets 放静态文件
            -components 放组件的
            -views     放的也是组件,但是他是页面组件
            -App.vue   主页面
            -main.js    项目主js(所有的配置,需要在里面写),入口
            -router.js  路由配置相关
            -store.js  vuex组件相关的,状态管理器
            -package.json  项目所有的依赖
    6 一个组件中,都会有三部分:
        -template   模板
        -script    写js代码
        -style     写样式
    7 element-ui
        -npm install element-ui
        -     
    
3 vue跟django数据通信(axios)

    -npm install axios

4 vue操作cookie并保存
    npm install vue-cookies

5 登陆接口

6 课程列表
    -vue路由携带参数跳转
    前面加一个冒号:后面传一个字典,指定name:路由的名字,params:是携带的参数
    
    <router-link :to="{name:'coursedetail',params:{'id':course.id}}">
        {{course.name}}
    </router-link>
    

7 课程详情页面

2.重点

　1、models.

　　2、APIView

　　3、ViewSetMixin

　　4、serializers

　　5、response

　　6、utils ------response

2、models

from django.db import models
from django.contrib.contenttypes.models import ContentType
from django.contrib.contenttypes.fields import GenericForeignKey,GenericRelation
# Create your models here.

class User(models.Model):
    name = models.CharField(max_length=32)
    pwd = models.CharField(max_length=32)
    type = models.ImageField(choices=((1,"common"),(2,"VIP"),(3,"SVIP")),default=1)
    bely = models.IntegerField()
    def __str__(self):
        return self.name

class UserToken(models.Model):
    user = models.OneToOneField("User",on_delete=models.CASCADE)
    token = models.CharField(max_length=128)

#专题课
class Course(models.Model):
    '''
    专题课程
    唯一性约束，名字不能重复
    '''
    name = models.CharField(max_length=128,unique=True)
    course_img = models.CharField(max_length=255,verbose_name="课程图片")
    brief = models.CharField(max_length=128,verbose_name="课程概述")
    level_choices = ((0,"初级"),(1,"中级"),(2,"高级"))
    level = models.SmallIntegerField(choices=level_choices,default=1)
    pub_date = models.DateField(verbose_name="发布日期",blank=True,null=True)
    period = models.PositiveIntegerField(verbose_name="建议学习周期(days)",default=7)
    order = models.IntegerField("课程顺序",help_text="从上一个课程数字往后排")
    status_choices = ((0,"上线"),(1,"下线"),(2,"预上线"))
    status = models.SmallIntegerField(choices=status_choices,default=0)
    price_policy = GenericRelation("PricePolicy")

    def __str__(self):
        return self.name

    class Meta:
        verbose_name_plural = "专题课--"

class CourseDetail(models.Model):
    course = models.OneToOneField("Course",on_delete=models.CASCADE)
    hours = models.IntegerField('课时')
    course_slogan = models.CharField(max_length=128,blank=True,null=True)
    recommend_courses = models.ManyToManyField("Course",related_name="recommend_by",blank=True)
    teachers = models.ManyToManyField("Teacher",verbose_name="课程讲师")

    def __str__(self):
        return self.course

    class Meta:
        verbose_name_plural = "课程详细"

class PricePolicy(models.Model):
    '''
    价格与有课程小气表
    '''
    content_type = models.ForeignKey(ContentType,on_delete=models.CASCADE)
    object_id = models.PositiveIntegerField()
    content_object = GenericForeignKey('content_type','object_id')
    valid_period_choices = ((1,"1 day"),(3,"3 天"),(7,"7天"))
    valid_period = models.SmallIntegerField(choices=valid_period_choices)
    price = models.FloatField()

    class Meta:
        unique_together = ("content_type","object_id","valid_period")
        verbose_name_plural = "价格策略"

    def __str__(self):
        return "%s(%s)%s"%(self.content_type,self.get_valid_period_display(),self.price)

class Teacher(models.Model):
    name = models.CharField(max_length=32)
    image = models.CharField(max_length=128)
    brief = models.TextField(max_length=128)

    def __str__(self):
        return self.name

    class Meta:
        verbose_name_plural = "讲师"

admin.py

from django.contrib import admin

# Register your models here.
from app01 import models

admin.site.register(models.Course)
admin.site.register(models.CourseDetail)
admin.site.register(models.PricePolicy)
admin.site.register(models.Teacher)
admin.site.register(models.User)
admin.site.register(models.UserToken)

urls.py

from django.contrib import admin
from django.urls import path
from app01.views import courseview

urlpatterns = [
    path('admin/', admin.site.urls),
    path('course/', courseview.Course.as_view({'get':'get_all','post':'add_course'})),
    path('course/(?P<id>d+)', courseview.Course.as_view({'get':'get_one','delete':'deletecourse'})),
]

views文件夹下的courseview.py

from app01 import models
from rest_framework.views import APIView
from rest_framework.viewsets import ViewSetMixin
from app01.Myser import CourseSer
from rest_framework.response import Response
from app01.utils import MyResponse

class Course(ViewSetMixin,APIView):

    def get_all(self,request,*args,**kwargs):
        response = MyResponse()
        course_list = models.Course.objects.all()
        courseSer = CourseSer(instance=course_list,many=True)
        response.msg = "查询成功"
        response.data = courseSer.data
        return Response(response.get_dic)

    def get_one(self,request,*args,**kwargs):
        pass
    def add_course(self,request,*args,**kwargs):
        pass
    def deletecourse(self,request,*args,**kwargs):
        pass

Myser.py

from rest_framework import serializers
from app01 import models

class CourseSer(serializers.ModelSerializer):
    class Meta:
        model = models.Course
        fields  = '__all__'

utils.py  作为工具

class MyResponse():
    def __init__(self):
        self.status = 100
        self.msg = None

    @property
    def get_dic(self):
        return self.__dict__