基于多对多字段的增删改查

增：

def add_users(request):
    if request.method == "POST":
        user_id = request.POST.getlist("add_user")
        text_users = request.POST.get("text_users")
        text_pwd = request.POST.get("text_pwd")
        new_id = models.User.objects.create(name=text_users, pwd=text_pwd)
        new_id.roles.add(*user_id)  # 多对多字段添加方法
        return redirect("/users/")
    add_obj = models.Role.objects.all()
    return render(request, "add_users.html", locals())

删：

def delete_users(request, id):
    models.User.objects.filter(id=id).delete()
    return redirect("/users/")

改：

def edeit_users(request, id):
    if request.method =="POST":
        user_id = request.POST.getlist("add_user")
        text_users = request.POST.get("text_users")
        text_pwd = request.POST.get("text_pwd")
        update_obj = models.User.objects.get(id=id)
        update_obj.name=text_users
        update_obj.pwd=text_pwd
        # 多对多用set
        update_obj.roles.set(user_id)
        update_obj.save()
        return redirect("/users/")
    
    user_text = models.User.objects.filter(id=id)
    roles_list = user_text.values_list("roles__id")
    roles_list_new = []
    for i in roles_list:
        roles_list_new.append(i[0])
    role_list = models.Role.objects.all()
    id = id
    return render(request, "edeit_users.html", locals())

查：

def users(request):
    user_list = models.User.objects.all()

    return render(request, "user.html", locals())