[bug] Deserialize breaks ctype inheritance

[James Harvard]

I've sent it to Lassosoft already, but thought the list archives might benefit from a 'heads-up' on a bug that bit me this afternoon involving inheritance, custom types and overloading onDeserialise (it's a ctype that's stored in a session variable, hence the deserialise).

When a ctype is deserialised into a var it seems to break the parent/child inheritance 'context' of the ctype. This means that the child type's member tags that should overload the parent's member tags are effectively unavailable.

Test case below.

James Harvard


<?LassoScript

define_type('type1');

        local( 'msgs' = array );

        define_tag('oncreate');
                self->whoami;
        /define_tag;

        define_tag('whoami');
                self->'msgs'->insert( 'This is a ' self->type );
        /define_tag;

        define_tag('membertag');
                self->'msgs'->insert('type1->membertag');
        /define_tag;
       
        define_tag('ondeserialize');
                self->'msgs'->insert('type1->ondeserialize');
                self->membertag;
                self->whoami;
        /define_tag;
       
/define_type;
       
define_type( 'type2','type1' );

        define_tag('membertag');
                self->'msgs'->insert('type2->membertag');
        /define_tag;

/define_type;

var( 'type2_normal' = type2 );

var('type2_deserialised')->deserialize( $type2_normal->serialize );
$type2_normal->ondeserialize;

encode_break( '$type2_normal:\n' + $type2_normal->'msgs'->join('\n') );

'<br />' * 2 ;

encode_break( '$type2_deserialised:\n' + $type2_deserialised->'msgs'->join('\n') );

/*

On Lasso 8.5.6 this returns:

$type2_normal:
This is a type2
type1->ondeserialize
type2->membertag
This is a type2

$type2_deserialised:
This is a type2
type1->ondeserialize
type1->membertag
This is a type1

*/

?>

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[Göran Törnquist-2]

You might get different results if you define the ctypes from the
LassoStartup folder. I do remember having issues with deserialization
and ctypes when they were defined during the page load.

Or...you might need to load/define all your ctypes _before_ you issue
the session_start in your code.

/Göran

James Harvard wrote:

> I've sent it to Lassosoft already, but thought the list archives might benefit from a 'heads-up' on a bug that bit me this afternoon involving inheritance, custom types and overloading onDeserialise (it's a ctype that's stored in a session variable, hence the deserialise).
>
> When a ctype is deserialised into a var it seems to break the parent/child inheritance 'context' of the ctype. This means that the child type's member tags that should overload the parent's member tags are effectively unavailable.
>
> Test case below.
>
> James Harvard
>
>
> <?LassoScript
>
> define_type('type1');
>
> local( 'msgs' = array );
>
> define_tag('oncreate');
> self->whoami;
> /define_tag;
>
> define_tag('whoami');
> self->'msgs'->insert( 'This is a ' self->type );
> /define_tag;
>
> define_tag('membertag');
> self->'msgs'->insert('type1->membertag');
> /define_tag;
>
> define_tag('ondeserialize');
> self->'msgs'->insert('type1->ondeserialize');
> self->membertag;
> self->whoami;
> /define_tag;
>
> /define_type;
>
> define_type( 'type2','type1' );
>
> define_tag('membertag');
> self->'msgs'->insert('type2->membertag');
> /define_tag;
>
> /define_type;
>
> var( 'type2_normal' = type2 );
>
> var('type2_deserialised')->deserialize( $type2_normal->serialize );
> $type2_normal->ondeserialize;
>
> encode_break( '$type2_normal:\n' + $type2_normal->'msgs'->join('\n') );
>
> '<br />' * 2 ;
>
> encode_break( '$type2_deserialised:\n' + $type2_deserialised->'msgs'->join('\n') );
>
> /*
>
> On Lasso 8.5.6 this returns:
>
> $type2_normal:
> This is a type2
> type1->ondeserialize
> type2->membertag
> This is a type2
>
> $type2_deserialised:
> This is a type2
> type1->ondeserialize
> type1->membertag
> This is a type1
>
> */
>
> ?>
>
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> This list is a free service of LassoSoft: http://www.LassoSoft.com/
> Search the list archives: http://www.ListSearch.com/Lasso/Browse/
> Manage your subscription: http://www.ListSearch.com/Lasso/
>
>
>
>  

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[James Harvard]

>You might get different results if you define the ctypes from the LassoStartup folder. I do remember having issues with deserialization and ctypes when they were defined during the page load.

Ah - that might be the case. Thanks.

>Or...you might need to load/define all your ctypes _before_ you issue the session_start in your code.

Pretty sure they were defined before session_start and the problem occurred without any session involvement anyway.

Lassosoft, could we please have a bit more feedback on bug reports? Currently it just seems that they disappear into a black hole. It would be nice to know that they've at least been read!

James

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[bilcorry]

James Harvard wrote on 7/18/2009 8:01 AM:
> Lassosoft, could we please have a bit more feedback on bug reports?
> Currently it just seems that they disappear into a black hole. It
> would be nice to know that they've at least been read!

If you report it via "My Account" at Lassosoft.com, then you can track it.


- Bil


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