How to set multi-dimensional array in Twig?

Question

I'm working on Twig for templating in my Symfony2 project. I need to define a 2 dimensional array. I tried like

{% set fields = { {'name': 'description', 'value':  '1'}, { 'name': 'abc', 'value': '2'}, { 'name':'tags', 'value': '3'} } %}

But I'm getting

A hash key must be a quoted string, a number, a name, or an expression enclosed in parentheses (unexpected token "punctuation" of value "{" in ABundle:XYZ:edit_a_page.html.twig at line 51

Not sure what is wrong with the above code.

What is the right syntax to set a 2 dimensional array in twig?

Try thinking about JSON next time, TWIG nearly has the same array syntax — Touki
– Touki, Commented Mar 13, 2014 at 9:03

Buga Dániel · Accepted Answer · 2014-03-13 08:55:56Z

43

In Twig, arrays are marked with [], and hashes with {}. A hash is a key-value pair with explicit keys (strings or integers), an array is simply a set of values without any explicitly defined keys (they will be indexed numerically).

In order to use a hash, you MUST provide a key for each element.

So, what you want is probably {% set fields = [ {'name': 'description', 'value': '1'}, { 'name': 'abc', 'value': '2'}, { 'name':'tags', 'value': '3'} ] %}

answered Mar 13, 2014 at 8:55

Buga Dániel

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3 Comments

stabbie Over a year ago

So how would you change the main key? At the moment it's still 0,1,2,3 etc.

William Turrell Over a year ago

If you want to set your own unique keys, use the hash syntax (outer curly braces rather than square brackets) and put the key followed by a colon before each one, as in user1529918's answer. Also useful: Twig's dump function, to verify what it's seeing.

Tomk07 Over a year ago

Hi, this may be a dumb question, but what class of object is this hash? It's just an associative array? Would json.decode('{{...},{....}}') make an object of the same class?

xfloys2112 · Accepted Answer · 2016-11-10 15:24:52Z

3

You can do it like this {% set foo = {"adjuster_list": {"id": "1", "name": "Joe Smith"}} %}

answered Nov 10, 2016 at 15:24

xfloys2112

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2 Comments

xfloys2112 Over a year ago

Or like this: {% set foo = {"adjuster_list": [{"id": 1, "name": "Joe Smith"}]} %}

Vishal Kumar Sahu Over a year ago

That is helpful. Or it is in JSON style.

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