v10.12.0
从数组中选择所有表达式值为真的对象。下面的例子中，假设你要从产品列表中筛选出来厨房用品。利用 where_exp 可以创建一个只包含 "type" 为 "kitchen" 的列表。
输入
All products:
{% for product in products %}
- {{ product.title }}
{% endfor %}
{% assign kitchen_products = products | where_exp: "item", "item.type == 'kitchen'" %}
Kitchen products:
{% for product in kitchen_products %}
- {{ product.title }}
{% endfor %}输出
All products:
- Vacuum
- Spatula
- Television
- Garlic press
Kitchen products:
- Spatula
- Garlic press