Re: [studs-devel] access to datasource from taglib

[Dan A. <dan...@gm...>]

merged

On 6/30/05, Dan Allen <dan...@gm...> wrote:
> Beautiful suggestion.  Although data access in tag libraries is one of
> debate (possibly breaking MVC), I feel that a framework should not
> restrict the user from choosing to do things a certain way.
> Therefore, I will offer this method as an option, similar to Struts.
>=20
> Additionally, I would really like to see the sql tag library ported to
> Studs so that it is easy to throw together some SQL statements using
> standard tag libraries.  Anyone want to give it a go?
>=20
> /dan
>=20
> On 6/30/05, Timur Vafin <ti...@e-...> wrote:
> > Hello.
> >
> > Let's assume, that it is required to create tag carrying out specific t=
hings in the project.
> > Tag should take data from from DB by interaction with a class Manager
> > which it is returned DataSource object reference.
> >
> >
> > Let's name ours tag HtmlAreaTag, which detching data by the key.
> >
> > class HtmlAreaTag extends TagSupport
> > {
> > ....
> >
> >         function getBlock()
> >         {
> >                 $manager        =3D& new HtmlAreaManager(TagUtils::getD=
ataSource($this->pageContext));
> >                 $block          =3D& $manager->getRowByAlias($this->get=
Alias());
> >
> >                 return is_null($block) ? '' : $block->getHtml();
> >         }
> >
> > }
> >
> > For this purpose in TagUtils I suggest to add function
> >
> >
> >     /**
> >      * Return the default data source for the current module.
> >      *
> >      * @param request The HttpServletRequest we are processing
> >          * @return DataSource
> >          * @throws ServletException If the datasource with the specifie=
d key could not be found
> >          */
> >         function &getDataSource(&$pageContext, $key =3D null)
> >         {
> >                 if (is_null($key))
> >                 {
> >                         $key =3D c('StudsConstants::DATA_SOURCE_KEY');
> >                 }
> >
> >                 // identify the current module
> >                 $request                =3D& $pageContext->getRequest()=
;
> >                 $servletContext =3D& $pageContext->getServletContext();
> >                 $moduleConfig   =3D& ModuleUtils::getModuleConfig($requ=
est, $servletContext);
> >
> >                 // return the requested data source instance
> >                 $ds =3D& $servletContext->getAttribute($key . $moduleCo=
nfig->getPrefix());
> >                 if ($ds =3D=3D null)
> >                 {
> >                         throw_exception(new ServletException('The datas=
ource with the requested key \'' . $key . '\' has not been configured'));
> >                         return;
> >                 }
> >
> >                 return $ds;
> >         }
> >
> >
> >
> >
> >
> > --
> >  Send plain text only to timurv at e-kazan dot ru
> >  PGP key: http://wwwkeys.us.pgp.net:11371/pks/lookup?op=3Dget&search=3D=
0x425B9F0F
> > --
> >  Timur Vafin
> >
> >
> >
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> > stu...@li...
> > https://lists.sourceforge.net/lists/listinfo/studs-devel
> >
>=20
>=20
> --
> Open Source Advocacy
> http://www.mojavelinux.com
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