视图层

视图层

三板斧

"""
HttpResponse
	返回字符串类型
render
	返回html页面，并且可以传值
redirct
	重定向
"""

JsonResponse

from django.http import JsonResponse


def ab_json(request):
    user_dic = {
        'username': 'jason',
        'password': 123,
        'hobby': '喝茶'
    }
    l = [11, 22, 333, 44, 555, 55, 66]
    # json_str = json.dumps(user_dic, ensure_ascii=False)
    # print(json_str)
    # return HttpResponse(json_str)
    # return JsonResponse(user_dic, json_dumps_params={'ensure_ascii': False})
    return JsonResponse(l, safe=False)

form表单上传文件

def file(request):
    if request.method == 'POST':
        # print(request.POST) # 拿不到文件数据，只能获取普通的键值对数据
        # print(request.FILES) # 获取文件数据
        file_obj = request.FILES.get('file') # 文件对象
        # print(file_obj.name)
        with open(file_obj.name, 'wb') as f:
            for line in file_obj:
                f.write(line)

    return render(request, 'fiel.html')


ps:
    print(request.path) # /app01/file/
    print(request.path_info) # /app01/file/
    print(request.get_full_path()) # /app01/file/?username=lyh

FBV CBV

视图函数既可以是函数也可以是类

# CBV
    #CBV路由
    path('login/', views.Mylogin.as_view())
    
from django.views import View
class Mylogin(View):
    def get(self, request):
        return render(request, 'fiel.html')

    def post(self, request):
        return HttpResponse('Post')
    
"""
cbv可以根据请求方式的不同，匹配到不同的方法
"""