树枝循环分组 [英] Twig Loop Grouping
问题描述
Lets say I have some data called 'people' in an array past into a twig template like this:
firstname | surname | colour
Fred Smith Blue
James Holmes Red
Sarah Fisher Blue
Chrstine Jenkins Yellow
Sid Wells Red
Cory Simpson Blue
Laura Jones Yellow
With this data i need to group them by the 'colour' column. by wrapping a div around the users based on there colour. e.g
<div class="colour_container">
Fred Smith - Blue<br>
Sarah Fisher - Blue<br>
Cory Simpson - Blue<br>
</div>
<div class="colour_container">
James Holmes - Red<br>
Sid Wells - Red<br>
</div>
<div class="colour_container">
Christine Jenkins - Yellow<br>
Laura Jones - Yellow<br>
</div>
now if I use a twig loop, it puts the div around each name rather than grouping them by colour. Whats the easiest way to get the above output? Ive tried all sorts of things in the loop but I am struggling.
{% for p in people %}
<div class="colour_container">
{{ p.firstname }} {{ p.surname }} - {{ p.colour }}
</div>
{% endfor %}
I need it to somehow loop through unique colour values first then loop through the names that belong to that colour.
I've had similar problem recently. I have made extension and published it as open source. It introduces lambda expressions and |group_by
filter.
https://github.com/dpolac/twig-lambda
With that you can simply write:
{% for colour, group in people|group_by(=> _.colour) %}
<div class="colour_container">
{% for person in group %}
{{ person.firstname }} {{ person.surname }} - {{ person.colour }}
{% endfor %}
</div>
{% endfor %}
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