21.caseplatform 后端代码整体设计2

项目应用代码设计

project\models设计

之前我们已经写过项目的model，但是写的比较简单，我们这里来丰富一下

from django.db import models
from django.contrib.auth.models import User
# Create your models here.
class Projects(models.Model):
    name = models.CharField(max_length=200, unique=True)
    desc = models.CharField(max_length=200, null=True, blank=True, default='')
    create_time = models.DateTimeField(auto_now_add=True)
    update_time = models.DateTimeField(auto_now=True)
    class Meta:
        # db_table数据表名称
        db_table = 'projects'
        # 描述信息,表示单数形式的显示
        verbose_name = '项目'
        # 表示复数形式的显示
        verbose_name_plural = verbose_name
        # 根据id 排序
        ordering = ['id']
    def __str__(self):
        return self.name

生成表

生成迁移脚本

(env) D:\code\caseplatform>python manage.py makemigrations

生成数据表

(env) D:\code\caseplatform>python manage.py migrate

project\serializers.py设计

from rest_framework import serializers
from .models import Projects
class ProjectsSerializer(serializers.ModelSerializer):
    class Meta:
        model = Projects
        exclude = ('update_time',)
        extra_kwargs = {
            "create_time": {
                "read_only": True,
                "format": "%Y年%m月%d日 %H:%M:%S"
            }
        }

project\views 设计

from .models import Projects
from .serializers import ProjectsSerializer
from rest_framework import filters, viewsets
from rest_framework import permissions
class ProjectViewSet(viewsets.ModelViewSet):
    # 一般需要指定queryset、serializer_class类属性
    queryset = Projects.objects.all()
    serializer_class = ProjectsSerializer
    # 指定过滤引擎
    filter_backends = [filters.SearchFilter, filters.OrderingFilter]
    # 过滤的字段
    search_fields = ['name', 'desc']
    ordering_fields = ['name']
    permission_classes = [permissions.IsAuthenticated]

project\urls设计

注意，这里需要新增urls.py 文件，如果之前已经新增，这里不需要新增

from project import views
from rest_framework import routers
# 创建SimpleRouter路由对象
router = routers.SimpleRouter()
# 注册projects
router.register('projects', views.ProjectViewSet)
urlpatterns = router.urls