[ppa-dev] Display portions of the interface that will fail?

[Karl O. P. <ko...@me...>]

Re: irc below

I've got it in my head that the interface should only display
an action when the user has the ability to carry out the action.
We use the $data->has* tests to avoid displaying parts of the
interface that don't apply to older pg releases, why shouldn't
the interface also pay attention to permissions and anything
else that can used to tell that the operation is not permitted
-- and if not permitted then not display the interface?

So, I test for insert permission before displaying the
import tab for tables, permission and insert-ness on
views likewise.  I plan to carry this through the
display interface in general.  E.g. do not display
a delete button if the user has no delete permission.

Now, the issue with views that arises is: what about rules?
I've avoided thinking about rules entirely; they are
depreciated in favor of triggers and we won't be worse
off then we are now in terms of functionality if rules
are ignored.  On the other hand perhaps there's an easy
way to tell if there's an instead rule on insert; my casual
glance hasn't found one.   So, if there's an easy way
to test against rules, fine we can do that.  Otherwise
I'm planning to ignore them when it comes to determining
whether an operation will succeed or fail.

Thoughts?

[16:04:20]<karlpinc> Humm.  I'd not paid attention to the foreign key 
part.  I  
                     always make a view for that sort of thing and put 
a        
                     insert trigger on it.  Sadly the stock ppa does 
not        
                     import into a view.  However I've some patches 
that do     
                     so.  I'm re-working them now for re-submission to 
ppa --   
                     mostly to add ppa self-tests to test the changes 
but I've  
                     tweaked things in a way that breaks backward       
       
                     compatibility  with older pg releases so I need a 
teeny    
                     fix for
          <karlpinc> that too.  I'm in the process of writing these 
patches     
                     now.  I've got the self tests done but when I went 
to do   
                     backward compatibity I started shaving yaks.  I'm 
back on  
                     track now.

[17:22:50]<xzi11a> that seems odd to me. i wouldnt think an admin 
interface     
                   would care about how the insert against the view is 
carried  
                   out 


Karl <ko...@me...>
Free Software:  "You don't pay back, you pay forward."
                 -- Robert A. Heinlein