Extending / Storage Layer / Working with Directives
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OverviewΒΆ
Directives are short segments of code that include an __invoke
statement and
manipulate queries. A good example of this would be the LimitDirective.
As you can see the code is very simplistic and all it does is manipulates the
query builder and sets a limit on the result.
The code that would execute the LimitDirective
would be:
{% setcontent mypages = 'pages' limit 1 %}
You can add your own directive by creating a new extension, and registering it as a directive handler for the content parser service. An example of doing that would be:
$app['query.parser'] = $app->extend(
'query.parser',
function ($parser) {
return $parser->addDirectiveHandler('limit', new LimitHandler());
}
);
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