PHP - Twig change array key value

Question

I am new to Twig and looking for a solution for the following (which would be very easy in PHP, however, our templates are setup in Twig)

What I'm trying to do

Edit an array value (using its index) in Twig so that it can be output after a loop.

What is happening

The array value (retrieved using its index) does not change when I try to edit the array value by index. Instead, it may append the value to the array

My code

...
{% set amount = [0,0,0] %}
{% for invoice in invoices %}
<tr>
    <td>{% if invoice.age <= 10 %}{% set amount ?????? %}{% endif %}</td>
    <td>{% if invoice.age > 10 and invoice.age <= 20 %}{% set amount ?????? %}{% endif %}</td>
    <td>{% if invoice.age > 20 %}{% set amount ?????? %}{% endif %}</td>
</tr>
{% endfor %}
...
{{ amount[0] }}

What I've tried

I have tried the following to change the value of age[0] to no avail.

{% set amount = amount|merge({0: 'test'}) %}

{% set amount = amount|merge({0: 'test'})|keys %}

{% set amount = amount|merge({(0), 'test'}) %}

{% set amount = amount|merge({(0), 'test'})|keys %}

... and many more.

Intended outcome

I want to be able to output {{ age[0] }} at the end to display the amount total of all invoices aged 10 or less. Similarly, I would also like to output age[1] and age[2] to display amount total for all invoices aged between 10 and 20 days, and over 20 days, respectively.

Alain · Accepted Answer · 2017-03-28 05:55:59Z

2

In twig, always keep everything simple, without hard logic.

In your case, just create 3 variables.

{% set amount_under_10, amount_between_10_and_20, amount_over_20 = 0,0,0 %}

{% for invoice in invoices %}
<tr>
    <td>{% if invoice.age <= 10 %}{% set amount_under_10 = amount_under_10 + 1 %}{% endif %}{{ invoice.age }}</td>
    <td>{% if invoice.age > 10 and invoice.age <= 20 %}{% set amount_between_10_and_20 = amount_between_10_and_20 + 1 %}{% endif %}{{ invoice.age }}</td>
    <td>{% if invoice.age > 20 %}{% set amount_over_20 = amount_over_20 + 1 %}{% endif %}{{ invoice.age }}</td>
</tr>
{% endfor %}

{{ amount_under_10 }}
{{ amount_between_10_and_20 }}
{{ amount_over_20 }}

See fiddle

If you need to be more generic (arbitrary number of ranges for example) don't do it in Twig. Twig is made for rendering information, no more.

answered Mar 28, 2017 at 5:55

Alain

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3 Comments

ctwheels Over a year ago

I ended up using the above method for the time being as it seems to provide the best method that currently exists to handling arrays (even though it doesn't really relate to the array data type). Unfortunately, this means I have to create many variables representing each value of the array, which is cumbersome. But at least it works.

Alain Over a year ago

Sure. But you still can develop something in the php side, why would you develop your logic in twig? Still consider twig as something that will display things, but no more. Think read-only with twig.

ctwheels Over a year ago

For the most part, that's what it is being used for, but in this instance, twig is being used to render a complex report (about 1100 pages). We gather data for our reports in SQL, organize it appropriately in PHP (if necessary; i.e. multiple selects), then call the twig template passing in the correct data for report creation. The reason we have some logic in the twig file is because we are allowing specific users to edit the report template, however, we don't want them to have access to the PHP code; strictly the twig/html/pdf output

savedario · Accepted Answer · 2017-06-26 11:58:36Z

0

See my answer here for a different approach.

I think I understand the idea behind keeping logic out of templates, but in my case I have SQL queries written by the administrator that are executed and a generic template outputs the results. It makes more sense to calculate totals in the template.

answered Jun 26, 2017 at 11:58

savedario

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PHP - Twig change array key value

What I'm trying to do

What is happening

My code

What I've tried

Intended outcome

2 Answers 2

3 Comments

Comments

Your Answer

Collectives™ on Stack Overflow

PHP - Twig change array key value

What I'm trying to do

What is happening

My code

What I've tried

Intended outcome

2 Answers 2

3 Comments

Comments

Your Answer

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