Tag

Twig

9 posts tagged Twig.

  • Diagram: a role hierarchy showing ROLE_ADMIN above ROLE_USER, beside three IS_AUTHENTICATED variants marked with which ones a plain visitor passes.

    09/02/2026

    is_granted in Twig: roles and IS_AUTHENTICATED

    is_granted takes more than roles, and picking the wrong one gives you a check that quietly passes when it should not. What each attribute tests, why role hierarchy makes ROLE_USER true for your admins, and where the check belongs.

  • Diagram: individually labeled form_row fields inside a form_start/form_end frame, with a form_rest chip carrying the CSRF token at the bottom.

    09/02/2026

    Rendering a Symfony form field by field in Twig

    One call renders the whole form and gives you no say in the markup. Splitting it up is four functions, and the one that matters most is form_rest - the safety net that stops a forgotten field from silently disappearing.

  • Diagram: autoescape on, punctured by |raw, with three contexts named where that filter is the wrong answer -- attribute, URL, inline JS and CSS.

    09/02/2026

    Twig autoescaping and the raw filter

    Autoescaping makes Twig safe by default and makes |raw the fastest way to undo that. The catch is that HTML escaping is only correct in HTML - inside a script tag or an unquoted attribute, the default is the wrong answer.

  • Diagram: a loop firing fifty queries at a database, compared against the same loop firing one query after addSelect().

    09/02/2026

    The N+1 you wrote in a Twig loop, and its fix

    The query looks fine and the template looks fine. Together they issue one query per row, because a lazy association is loaded the moment a template touches it - and templates touch things the controller never did.

  • Rendering Twig from Symfony Repositories Without DI

    07/04/2019

    Rendering a Twig template outside a controller

    You do not need a controller to render Twig, and you should not pass the container around to get at it. Inject the Environment, and use createTemplate when the template itself comes from the database.

  • Diagram: a child template's block calling parent() to keep the base template's stylesheet lines and add its own, against a faint version where they were lost.

    11/30/2015

    Extending a parent Twig block with parent()

    Define a block in a child template and it replaces the parent's version completely - which is rarely what you wanted for a block holding stylesheets or scripts. parent() puts the inherited content back.

  • Conditional User State in Twig Views

    04/28/2015

    Show the logged-in user in a Twig template

    The snippet everyone has saved uses app.user.username, which throws on every supported Symfony. Here is the version that works, which check to guard it with, and how to greet somebody by name rather than by email address.

  • Diagram: attribute(form, 'field_' ~ i) building a dynamic field name, resolving down to field_1 and field_2, guarded by an is defined check.

    04/14/2015

    Dynamic field names in Twig with attribute() and ~

    Dot notation cannot reach a property whose name you are building in the template. attribute() takes the name as a string, the tilde concatenates it, and `is defined` keeps the loop from throwing on a gap.

  • Diagram: a browser's cookie flowing into a Symfony Request object and out into a Twig template reading app.request.cookies.get('name').

    04/02/2015

    How to show or access cookie values in Symfony Twig views

    Strange how obscure it is to find a clear example of how to just access or show the value of a cookie in Twig, so here it is!

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