Write a specifc key to parse object with Twig

Question

I can't find the way to parse an array with a generate key with Twig :

My object post :

[blocks_content_0_title] => Title0

[blocks_content_1_title] => Title1

[blocks_content_2_title] => Title3

With Twig I can get value normally : post.blocks_content_0_title and it display Title0

But in my code I need to push specific key with variable for display value. And I can't parse with a classical twig for my object

My question is, how to insert a variable in key ?

Examples (and it doesn't work) :

{{ post.blocks_content_~myNumber~_title }}

{{ post['blocks_content_'~myNumber~'_title'] }}

Sorry for this horrible english ;)
Thanks for your help !

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Answer 1

Try using attribute():

{{ attribute(post, 'blocks_content_' ~ myNumber ~ '_title') }}

http://twig.sensiolabs.org/doc/2.x/functions/attribute.html

Personally, I'd consider refactoring so I don't have to do this in a template.

Write a specifc key to parse object with Twig

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