[jifty-devel] beginner at jifty needs help finding my way about

William F. Dudley Jr. wfdudley at gmail.com
Wed Jun 3 23:35:33 EDT 2009


Shawn,

Thanks loads, I'm on my way!

Bill Dudley


On 6/3/09, Shawn M Moore <sartak at bestpractical.com> wrote:
> Hi Bill,
>
> On Wed, Jun 03, 2009 at 10:23:14PM -0400, William F. Dudley Jr. wrote:
>> Hi,
>> I consider myself an experienced developer but am new to jifty, and wanted
>> to
>> avoid ruby on rails because I already use Perl.
>
> Great. :)
>
>> I've fooled around with the tutorials and am trying to build my own
>> application
>> (the only way I can lear, I'm afraid), and cannot seem to find things in
>> the
>> documentation, so I thought I'd ask here.
>
> That's fine. Please ask questions, there's no better indicator of where
> we need to improve documentation.
>
>> First question:
>>
>> In one of the tutorials, one creates a lib/MyApp/View.pm, and in there it
>> says:
>>     # Display each reader in a <dl>.
>>     dl {
>>         dt { }
>>         dd { }
>>         }
>>
>> I understand what this does, but where is the documentation for the
>> functions
>> dl(), dt(), and dd() ?  Surely there must be other functions to create
>> other HTML
>> markup but I can't find them even after browsing the various docs for
>> hours.
>
> This is Template::Declare code (brought in via "use
> Jifty::View::Declare"). Every common (and many uncommon) HTML tag is
> exposed to you. The only caveat is that "tr" is "row" and "td" is
> "cell". (tr is a special Perl builtin that we can't override)
>
>> Second question:
>>
>> I've created an App with two tables, one of which has "indices" into the
>> other.
>>
>> What documents should I be reading to figure out how to search for a
>> record,
>> or to retrieve a record based on an index or other field in a table?
>
> Our ORM is called Jifty::DBI. The API documentation is available in
> Jifty::DBI::Record and Jifty::DBI::Collection. The methods you want to
> look at are Record's load_by_cols and Collection's limit.
>
>> My record
>> pointers are NOT the native "autoincrement" unsigned int that one
>> would typically
>> use, since the application calls for records to have unique identifiers
>> that are
>> hardware based, sort of like the MAC address on an ethernet interface.  So
>> even though my app will create records 1,2,3,..., they will have unique
>> codes
>> based on the hardware, which will not, in general, be monotonically
>> increasing
>> or start with 1.
>
> Yep, that is fine. You could use something like:
>
>     my $computer = MyApp::Model::Computer->new;
>     $computer->load_by_cols(
>         MAC => $MAC,
>     );
>
>>
>> Thanks in advance,
>> Bill Dudley
>
> Enjoy!
>
> Shawn
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