django rest框架中模型的多种更新操作

Question

下面是我的模型

class Group(Log_Active_Owned_Model_Mixin):

    group_name = SafeCharField(max_length = 100, null=False, blank=False, sanitize_cb=safe_name_sanitizer)
    group_creator = ForeignKey(to=PSS_User, null=False, related_name="group_creator")
    members = ManyToManyField(to=PSS_User, through="GroupMemberShip", related_name="group_member")

    class Meta:
        ordering = ("Meta", )

    ## other methods also exists in this class.

class GroupMemberShip(Log_Active_Owned_Model_Mixin, ResolvableModelMixin):

    MEMBER_NONE     = 1
    MEMBER_ADMIN    = 2
    MEMBER_STANDARD = 4


    VALID_MEMBERSHIPS = (
        (MEMBER_ADMIN,      "Admin"     ),
        (MEMBER_STANDARD,   "Standard"  ),
        (MEMBER_NONE,       "None"      )
    )

    member  = ForeignKey(to=PSS_User, null=False, related_name="groups")
    group   = ForeignKey(to=Group, null=False, related_name="members")
    membership_type     = SmallIntegerField(editable=False, null=False, blank=False, choices=VALID_MEMBERSHIPS)
    membership_request  = ForeignKey(to=GroupMemberShipRequest, null=True, blank=True)  # null True for group creator

    class Meta:
        ordering = ("date_created")
        unique_together = ("member", "group")

    ## other methods also exists in this class.

class GroupMemberShipRequest(Log_Active_Owned_Model_Mixin):

    GRP_MEMBERSHIP_REQ_STATUS_ACCEPTED  = 1
    GRP_MEMBERSHIP_REQ_STATUS_REJECTED  = 2
    GRP_MEMBERSHIP_REQ_STATUS_PENDING   = 4

    VALID_REQUEST_STATUSES = (
        (GRP_MEMBERSHIP_REQ_STATUS_ACCEPTED,    "Accepted"),
        (GRP_MEMBERSHIP_REQ_STATUS_REJECTED,    "Rejected"),
        (GRP_MEMBERSHIP_REQ_STATUS_PENDING,     "Pending")
    )

    #   TODO :-
    #   Add a field in request-type. There are two types of requests :-
    #   User can request admin to include him in the request.
    #   Admin can request other user, to become part of given group.

    GRP_REQUEST_ACTIVE  = 1
    GRP_REQUEST_PASSIVE = 2

    VALID_GRP_REQUESTS = (
        (GRP_REQUEST_ACTIVE,    "Active"),
        (GRP_REQUEST_PASSIVE,   "Passive")
    )

    request_initiator = ForeignKey(to=PSS_User, null=False, blank=False)
    request_acceptor_rejector = ForeignKey(to=PSS_User, null=True, blank=False)
    request_status  = SmallIntegerField(null=False, editable=False, choices=VALID_REQUEST_STATUSES, default=GRP_MEMBERSHIP_REQ_STATUS_PENDING)
    target_group = ForeignKey(to=Group, null=False, blank=False, related_name="members")
    request_type = SmallIntegerField(null=False, editable=False, default=GRP_REQUEST_ACTIVE, choices=VALID_GRP_REQUESTS)

下面是不同类型的操作，可以使用此组模型实现：-

创建群组
更新群组
1. 更新组详细信息。
2. add/remove 群成员
3. 向外人发送邀请
4. 成为 admin/remove 管理员。
  - 删除群组

对于create/delete操作，事情很清楚，但我对更新操作感到困惑，因为有很多东西可以更新。目前，我已经在 Group class 中添加了辅助方法，它完成了上述所有活动。

我的问题是，如何将它与 DRF（Django Rest Framework）ModelViewSets 集成。由于只有一个 update() 方法，只能服务于上述更新场景之一。我如何处理其他更新场景？（一个可能的解决方案，我认为是在请求中使用操作类型标志并在 update() 方法中检查它来决定调用哪个模型方法，但它有点天真解决方案。有没有更好的在 Django Rest Framework 中如何做到这一点？）

提前致谢。

Answer 1

考虑这篇文章 Best Practices for Designing a Pragmatic RESTful API

Treat it like a sub-resource with RESTful principles. For example, GitHub's API lets you star a gist with PUT /gists/:id/star and unstar with DELETE /gists/:id/star.

在你的例子中，一组有 4 个不同的动作。我看到两种在 DRF 中解决它的方法。按照上面的提示，您可以使用 @detail_route 装饰器：

from rest_framework.decorators import detail_route

class GroupViewSet(viewsets.ModelViewset):

    @detail_route(methods=['put', 'delete'])
    def send_invite(self, request, pk=None):
        # check for the method provided 
        # do your logic and return a Response object
        pass

它将在详细信息页面之后向视图集路由器添加额外的端点

/api/groups/:id/send_invite/

它可以很好地处理简单的任务。但是当你需要一个复杂的嵌套逻辑时，你可能会发现这个包 drf-nested-routers 很有用。它允许您在彼此之上构建 viesets。

/api/groups/:id/admin/:id/

但有时它有点矫枉过正，违反了设计的最佳实践API

django rest框架中模型的多种更新操作

Multiple types of update operations for a model in django rest framework

python

django

django-rest-framework

django-rest-viewsets