在树枝中重组阵列

Question

我想倒入数组，以便第一个类别是首先，以便以后可以更好地管理自己的foreach。 我设法实现了它，但是Merge删除了相同的密钥。而且我不应该将值添加为数组中的另一个项目。

默认数组：

array:10 [
0 => array:2 [
    "type" => "type1"
    "object" => {
        name: "Sample name 1"
        category: "Cat1"
    }
]
1 => array:2 [
    "type" => "type1"
    "object" => {
        name: "Sample name 2"
        category: "Cat2"
    }
]
2 => array:2 [
    "type" => "type1"
    "object" => {
        name: "Sample name 3"
        category: "Cat1"
    }
]
3 => array:2 [
    "type" => "type1"
    "object" => {
        name: "Sample name 4"
        category: "Cat2"
    }
]

合并后：（已删除了两个记录:(）

array:2 [
  "Cat1" => array:2 [
    "type" => "type1"
    "object" => ...
  ]
  "Cat2" => array:2 [
    "type" => "type1"
    "object" => ...
  ]
]

他试图实现什么？

array:2 [
    "Cat1" => array:2 [
        0 => array:2 [
            "type" => "type1"
            "object" => {
                name: "Sample name 1"
                category: "Cat1"
            }
        ]
        1 => array:2 [
            "type" => "type1"
            "object" => {
                name: "Sample name 3"
                category: "Cat1"
            }
        ]
    ]
    "Cat2" => array:2 [
        0 => array:2 [
            "type" => "type1"
            "object" => {
                name: "Sample name 2"
                category: "Cat2"
            }
        ]
        1 => array:2 [
            "type" => "type1"
            "object" => {
                name: "Sample name 4"
                category: "Cat2"
            }
        ]
    ]
]

代码：

{% set organised_cats = {} %}

{% for element in sourceElements %}
    {% set organised_cats = organised_cats|merge({
    (element.object.category) : element
    }) %}
{% endfor %} 

Answer 1

首先是仅供参考，这不是您在模板中应该做的事情，因为代码非常混乱。无论如何，这是您在 twig 中合并/组数组的方式：

{% set output = [] %}
{% for item in items %}
    {% if not attribute(output, item.object.category) is defined %}
        {% set output = output|merge({ (item.object.category) : {}, }) %}
    {% endif %}

    {% set output = output|merge({(item.object.category) : output[item.object.category] | merge([ item, ]) }) %}
{% endfor %}

{% for category, items in output %}
    {{ category }}:
        {% for item in items %}
            {{ item.object.name }}
        {% endfor %}
{% endfor %}

demo

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