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https://issues.apache.org/jira/browse/ISIS-2700?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17351731#comment-17351731
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Martin Hesse commented on ISIS-2700:
------------------------------------

But wasn't it like this before, that when a user didn't have the permission to 
view a type, (irrespective of whether through tenancy or roles) then an error 
message would be displayed, saying "Not authorized or not such object"?

It did make sense to me, more than if I would have to implement a Tenancy 
Evaluator for each entity type and re-implement the permission voting in there. 

> Veto Viewing permission for Type not honored
> --------------------------------------------
>
>                 Key: ISIS-2700
>                 URL: https://issues.apache.org/jira/browse/ISIS-2700
>             Project: Isis
>          Issue Type: Bug
>          Components: Isis Extensions SecMan, Isis Viewer Wicket
>    Affects Versions: 2.0.0-M5
>            Reporter: Martin Hesse
>            Assignee: Andi Huber
>            Priority: Major
>             Fix For: 2.0.0-M6
>
>         Attachments: image-2021-05-26-15-18-02-115.png, 
> image-2021-05-26-15-20-31-139.png
>
>
> A permission that vetoes the viewing of a type (such as in the example below) 
> is not fully honored. In this concrete case a user that is being assigned a 
> role with this permission (and no other roles with any permission that would 
> contradict this permission) could still navigate to an entity page of a 
> ApplicationUser and would see the title and the the icon and perhaps an empty 
> metadata tab.
> The expected behavior would be the display of an error message saying "Not 
> authorized or no such object".
>  
> !image-2021-05-26-15-18-02-115.png!
>  
> This is a screenshot of how the vetoed entity page presents to the user:
> !image-2021-05-26-15-20-31-139.png!
>  



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