[Catalyst] Returning error codes to the user.

[Bill Moseley]

On Sun, May 2, 2010 at 12:53 PM, Matt S Trout <mst at shadowcat.co.uk> wrote:

>
> Am I correct in thinking that's built up in multiple ->search calls?
>

Somewhat, yes.


>
> ... if you keep all the intermediate resultsets around in the stash or
> wherever (or better still refactor to resultset methods and have your
> custom resultset class keep the intermediate resultsets around) then it
> seems like it should be pretty easy to walk back up the chain making
> the extra queries until one returns data - at which point you know the la=
st
> step you walked back up is the problem child for this request.
>

That's an interesting idea.  So, instead of adding multiple constraints in a
single call to search I could do it individually.
I'm not sure if I need to subclass the resultset_class -- could just add a
controller base class method.  i.e.:


$self->add_to_resultset( $c,
    'User account must be active',
    { me.active =3D> 1 },
);

$self->add_to_resultset( $c,
    'User account expired',
    {   'me.date_expires'       =3D> [
            { '>' =3D> \'now()' },  # past expired
            { '=3D' =3D> undef },     # or never expires
        ],
    },
);

$self->add_to_resultset( $c,
    'Parent account must be active',
    { 'account.active' =3D> 1 },
    { join =3D> 'account' },
);

etc.

Then, as you say, if $self->current_resultset->first (top of stack) fails
then work down the stack until find the spot where the query passes and
return the previous message.

Thanks,



-- =

Bill Moseley
moseley at hank.org
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