前台主页配置

【一】轮播图接口

【1】创建表

• common_mdoel(公用)

from django.db import models


class BaseModel(models.Model):
    created_time = models.DateTimeField(auto_now_add=True, verbose_name='创建时间')
    updated_time = models.DateTimeField(auto_now=True, verbose_name='最后更新时间')
    is_delete = models.BooleanField(default=False, verbose_name='是否删除')
    is_show = models.BooleanField(default=True, verbose_name='是否上架')
    orders = models.IntegerField(verbose_name='优先级')

    class Meta:
        abstract = True  # 只用来继承，不在数据库中生成表

• Banner(轮播图表)

from django.db import models

# Create your models here.
from django.db import models

from luffy.utils.common_model import BaseModel


class Banner(BaseModel):
    title = models.CharField(max_length=16, unique=True, verbose_name='名称')
    image = models.ImageField(upload_to='banner', verbose_name='图片')
    # web  , 小程序 ，app --》轮播图--》可以点击--》点击--》跳转到某个地址
    # 跳转有两种情况：1 外链  2 自己的页面
    link = models.CharField(max_length=64, verbose_name='跳转链接')
    info = models.TextField(verbose_name='详情')
    class Meta:
        db_table='luffy_banner'
        verbose_name = '轮播图表'
        verbose_name_plural = verbose_name

    def __str__(self):
        return self.title

【2】BannerView

from django.shortcuts import render
from rest_framework.viewsets import GenericViewSet
from rest_framework.mixins import ListModelMixin, RetrieveModelMixin, CreateModelMixin, UpdateModelMixin, DestroyModelMixin


from luffy.apps.home.models import Banner
from luffy.apps.home.serializer import BannerSerializer
from utils.common_mixin import APIListModelMixin


# Create your views here.
# 查询所有轮播图接口
class BannerView(GenericViewSet, APIListModelMixin):
    # 按优先级的顺序来查
    queryset = Banner.objects.all().filter(is_delete=False,is_show=True).order_by("orders")[0:settings.BANNER_COUNT]
    serializer_class = BannerSerializer

【3】序列化类

from rest_framework import serializers

from luffy.apps.home.models import Banner


class BannerSerializer(serializers.ModelSerializer):
    class Meta:
        model = Banner
        fields = ['title', 'image', 'link', 'info']

【4】配置路由

from django.urls import path,include
from rest_framework.routers import SimpleRouter

from luffy.apps.home.views import BannerView

router=SimpleRouter()
router.register('banner',BannerView,basename='banner')

urlpatterns = [
 path('',include(router.urls))
]

【5】定制返回格式（APIResponse）

• utils/common_mixin.py

from rest_framework.mixins import ListModelMixin, RetrieveModelMixin, CreateModelMixin, UpdateModelMixin, \
    DestroyModelMixin

from utils.common_response import APIResponse


class APIListModelMixin(ListModelMixin):
    def list(self, request, *args, **kwargs):
        res = super().list(request, *args, **kwargs)
        return APIResponse(result=res.data)

【二】自定义配置

• settings/common_settings.py

# 用户自己的配置，开发或线上都会用
BANNER_COUNT = 3

• 全局配置

from .common_settings import *

【三】simpleui

【1】安装

pip install django-simpleui

【2】app注册

• 要放在最上面

INSTALLED_APPS = [
    'simpleui',
]

【3】在admin中注册

from django.contrib import admin

# Register your models here.
from .models import Banner
# Register your models here.
@admin.register(Banner)
class BannerAdmin(admin.ModelAdmin):
    list_display = ('id', 'title', 'image', 'link')

from .models import User
admin.site.register(User)

【四】项目架构

项目架构
	-1 纯大单体
    	-一个后端 django
        -小程序 ：一个项目
        -后台管理 ：一个项目
        -主站：一个项目   或者 后台管理和主站是同一个响应
        
	-2 微服务架构--》服务和服务间通信--》消息队列
        -后台管理：vue 后台管理 +django +自己数据库
        -主站： vue写主站      +go     +自己数据库
        -小程序：微信小程序     +java   +自己数据库
        
    -3 微服务架构
    	-前端淘宝：访问不同功能，地址不一样即可
        -后端：go 订单板块，java商品板块，python 用户行为分析

【五】模型表做序列化

# 混入类，提供Model实例to_dict方法
class ModelMixin(object):
    __slots__ = ()

    def to_dict(self, excludes: tuple = None, selects: tuple = None) -> dict:
        if not hasattr(self, '_meta'):
            raise TypeError('<%r> does not a django.db.models.Model object.' % self)
        elif selects:
            return {f: getattr(self, f) for f in selects}
        elif excludes:
            return {f.attname: getattr(self, f.attname) for f in self._meta.fields if f.attname not in excludes}
        else:
            return {f.attname: getattr(self, f.attname) for f in self._meta.fields}

    def update_by_dict(self, data):
        for key, value in data.items():
            setattr(self, key, value)
        self.save()