06.drf(django)的权限

默认配置已经启用权限控制

• settings

 'django.contrib.auth',

默认 migrate 会给每个模型赋予4个权限，如果 ORM 类不托管给django管理，而是直接在数据库中建表，模型的权限就不生效了?

一.如果需要经过登陆后才能访问，使用IsAuthenticated

• 1.默认登陆，也可以访问drf的api
  

• 2.视图里加认证

from rest_framework.permissions import IsAuthenticated
permission_classes = (IsAuthenticated,)

• 3.设置全局认证方式

REST_FRAMEWORK = {
    'DEFAULT_PERMISSION_CLASSES': (
        'rest_framework.permissions.IsAuthenticated',
    )
}

# 默认是
'DEFAULT_PERMISSION_CLASSES': (
   'rest_framework.permissions.AllowAny',
)

二.只允许模型安全方法 get/head/option DjangoModelPermissions

执行 add delete 和 put 没权限

{
"detail": "You do not have permission to perform this action."
}

[21/May/2020 14:20:18] "DELETE /idcs/1/ HTTP/1.1" 403 63
Forbidden: /idcs/2/

三.自定义权限，控制查看的权限

• 1.permissions.py

class Permissions(DjangoModelPermissions):

    def get_custom_perms(self, view, method):
        if hasattr(view, "extra_perm_map"):
            if isinstance(view.extra_perm_map, dict):
                return view.extra_perm_map.get(method,[])
        return []

    def has_permission(self, request, view):
        # Workaround to ensure DjangoModelPermissions are not applied
        # to the root view when using DefaultRouter.
        if getattr(view, '_ignore_model_permissions', False):
            return True

        if not request.user or (
           not request.user.is_authenticated and self.authenticated_users_only):
            return False

        queryset = self._queryset(view)
        perms = self.get_required_permissions(request.method, queryset.model)
        perms.extend(self.get_custom_perms(view, request.method))
        return request.user.has_perms(perms)

• 2.在需要增加权限的视图增加额外权限

    extra_perm_map = {
        "GET": ['idcs.view_idc']
    }

• 3.覆盖全局权限

    'DEFAULT_PERMISSION_CLASSES': (
        # 'rest_framework.permissions.DjangoModelPermissions',
        'utils.permissions.Permissions',
    )

• 4.如果没授权

[21/May/2020 14:58:24] "GET / HTTP/1.1" 200 6511
Forbidden: /ProductModel/

https://www.w3cschool.cn/lxraw/lxraw-3meu35ov.html
https://www.django-rest-framework.org/api-guide/permissions/