ActionView

Overview

Presents a fixed action to a permission check, delegating every other attribute (get_queryset() included) to the wrapped view unchanged.

A permission class reads view.action to decide which named permission a request needs -- for example list versus read for two actions that both use GET. Wrapping the view this way lets a caller check authorization for one specific action, independently of whatever action the surrounding response is actually for, without mutating the wrapped view's own action attribute. get_queryset(), reached through this wrapper, still runs as a bound method of the wrapped view and reads that view's real action, so it keeps building whatever queryset the actual request would have built.

__class__ reports the wrapped view's own class rather than ActionView itself, so isinstance(action_view, ViewSet) is true and a viewset method invoked unbound with this wrapper standing in for self (:func:vueda.core.permissions.check_action_permission does exactly this for check_object_permissions) can still reach its own base implementation through a bare, zero-argument super() call -- that call requires self to appear as an instance of the class defining the method, which this wrapper otherwise would not. Delegation through __getattr__ is what keeps that safe: a method reached that way still runs bound to the real view, so this spoof only ever affects the one direct isinstance check, never which object a nested call like get_queryset() actually runs against.

__init__

Signature

__init__(view, action)

Parameters

Name	Type	Required	Default	Description
view		yes
action		yes

Source

server/vueda/core/utils.py:95

action

Source

server/vueda/core/utils.py:71