from django.forms import ModelFormclass Test(ModelForm):# 把那张表转化成form组件class Meta:# 这个意思即是把Article转化成form组件model = models.Article# 把表中的所有的字段都做转化，这里也可以传递一个list,可以指定显示某些字段fields = "__all__"# modelform组件的使用方法和forms组件的用法一样，但是i如果要保存出数据的时候,可以直接调用save方法保存就可以了，无论是单表，一对多，还是多对多# 如果增加数据# form = Test(request.POST)# if form.isvalid():#     form.save()# 这样就可以直接保存# 如果编辑数据，用下面的方法就可以把当前的对象的值渲染到form表单中，无论是单表，一对多，还是多对多# obj = models.Article.objects.all().first()# form = Test(instance=obj)# 上面是实现渲染数据到form表单# form = Test(request.POST,instance=obj)# if form.isvalid():#     form.save()# 这个就是实现更新操作，和增加操作唯一的区别就是通过instance传递一个要编辑的对象进去就可以了

def test_models(request):method = request.method.lower()if method == "get":body_list = []obj  = models.Book.objects.all()head_list = models.Book._meta.get_fields()for i in obj:temp = []temp.append(i.bid)temp.append(i.title)temp.append(i.publish)temp.append(i.auther.all())body_list.append(temp)return render(request,"modelform_html1.html",locals())else:pass

class test(ModelForm):
class Meta:
model = models.Book
fields = "__all__"
labels = {"title":"书籍的名称","auther":"作者","publish":"出版社"}
error_messages = {
"title":{"required":"不允许为空",
"invalid":"格式错误"
}
}
widgets = {
"title":wd.TextInput(attrs={"placeholder":"密码"})
}field_classes = {
"title":forms.EmailField
}

def add(request):method = request.method.lower()if method == "get":model_form_obj = test()for i in model_form_obj:print(i.label_tag(),"----------------------")return render(request,"modelfrom_add.html",locals())else:model_form_obj = test(request.POST)if model_form_obj.is_valid():model_form_obj.save()return redirect("/app2/test_models/")else:print("出错了")model_form_obj = test(request.POST)return render(request, "modelfrom_add.html", locals())

def edit(request):method = request.method.lower()book_obj = models.Book.objects.get(bid=int(request.GET.get("id")))if method == "get":model_form_obj = test(instance=book_obj)return render(request,"modelfrom_add.html",locals())else:model_form_obj = test(request.POST,instance=book_obj)model_form_obj.save()return redirect("/app2/test_models/")