Solution:

{{ dump() }}

displays all variables.

---

cant get {{_self}} to function in the frontend branch throws an error when used:

twig_Error_Runtime: An exception has been thrown during the rendering of a template ("Object of type "__TwigTemplate_6e62bf61c51b42082c46ee1f4d61501d" cannot be printed.") in "core/themes/stark/templates/system/breadcrumb.twig" at line 15. in Twig_Template->displayWithErrorHandling() (line 269 of /Users/mortendk/Dropbox/websites/drupal8twig/core/vendor/twig/twig/lib/Twig/Template.php).

Comments

Fabianx’s picture

Fabianx CreditAttribution: Fabianx commented
Status: Active » Postponed (maintainer needs more info)

For what do you need {{ _self }} printed?

mortendk’s picture

mortendk CreditAttribution: mortendk commented

its nice to know what vars that are available ;)
else were kinda working in darkness arent we ?

right now im working on the breadcrumb function, so i wanted to know what the vars were called etc

Fabianx’s picture

Fabianx CreditAttribution: Fabianx commented
Category: bug » support
Status: Postponed (maintainer needs more info) » Active

Please use:

{{ dump(_context) }}

instead. That will give the vars available.

Leaving as active, so others can find it.

Fabianx’s picture

Fabianx CreditAttribution: Fabianx commented
Title: {{ _self }} in the frontend » {{ _self }} in the frontend => How do I dump or debug things?

You can also use kpr, dpr, dsm, etc. if devel module for D8 is downloaded and enabled. psynaptic took care of that.

mortendk’s picture

mortendk CreditAttribution: mortendk commented

awesome!!

anthonyR’s picture

anthonyR CreditAttribution: anthonyR commented

Lifesaver, thanks!

jenlampton’s picture

jenlampton
she / her
CreditAttribution: jenlampton commented
Status: Active » Closed (duplicate)

Can we use this solution for #1783134: [META] Make it possible to inspect twig variables and get information about objects and render arrays?
marking as dupe.

Fabianx’s picture

Fabianx CreditAttribution: Fabianx commented
Status: Closed (duplicate) » Active

Others need to find this issue, re-opening as a pure support request.

JohnAlbin’s picture

JohnAlbin
he/they/他
Primary language English
Location Taipei, Taiwan
CreditAttribution: JohnAlbin commented
Component: Twig templates » Twig templates conversion (front-end branch)

The issue summary says to use {{ dump() }}, while Fabian's comment #4 says to use {{ dump(_context) }}. Are they equivalent? It's unclear.

Fabianx’s picture

Fabianx CreditAttribution: Fabianx commented

They are equivalent according to docs.

JohnAlbin’s picture

JohnAlbin
he/they/他
Primary language English
Location Taipei, Taiwan
CreditAttribution: JohnAlbin commented

Thanks for the clarification. Then, I'll leave the issue summary as-is. :-)

steveoliver’s picture

steveoliver CreditAttribution: steveoliver commented

JohnAlbin: {{ dump() }} appears to use _context by default; {{ dump() }} outputs the same as {{ dump(_context) }} for me.

From Twig's docs on templates + a few inline notes from my observations:

  • _self references the current template -- it contains variables about a template, i.e. its filename and available Twig blocks;
  • _context: references the current context -- it contains variables for a template such as variables sent from theme(), prepared by preprocess, or set in the template;
  • _charset: references the current charset.
webthingee’s picture

webthingee CreditAttribution: webthingee commented

Until there is a way to use dsm, dpr, kpr
I am starting to find that what works well for me is..


<pre style="overflow: scroll; height: 300px">
{{ dump(_self) }}
</pre>
webthingee’s picture

webthingee CreditAttribution: webthingee commented
Issue summary: View changes

Add dump() function

Berdir’s picture

Berdir
Primary language German
Location Switzerland
CreditAttribution: Berdir commented

This was referenced in http://drupal.stackexchange.com/questions/98014/devel-dsm-function-in-dr....

Would be great if someone in here could provide a more complete and detailed answer about what's currently available and possible. Easier to find than an issue and can be moved into d.o documentation later on.

star-szr’s picture

star-szr
he/him
Primary language English
CreditAttribution: star-szr commented
Issue summary: View changes

Posted an answer there, thanks @Berdir. See #2218949: Add Kint functionality to Twig templates, I hope we get tons of debugging options on contrib :)