高级 Liquid 技巧
本指南将介绍高级 Liquid 开发技巧,帮助您创建更加高效、可维护和强大的主题代码。
高级过滤器技巧
链式过滤器优化
<!-- 复杂的数据处理链 -->
{% assign featured_products = collection.products
| where: 'available', true
| where: 'tags', 'featured'
| sort: 'created_at'
| reverse
| limit: 8 %}
<!-- 价格范围过滤 -->
{% assign affordable_products = collection.products
| where: 'available', true
| map: 'price'
| where: '>', 0
| where: '<', 50000 %}
<!-- 复杂排序和分组 -->
{% assign grouped_products = collection.products
| group_by: 'vendor'
| sort: 'name' %}
{% for vendor_group in grouped_products %}
<h3>{{ vendor_group.name }}</h3>
{% assign vendor_products = vendor_group.items | sort: 'price' %}
{% for product in vendor_products limit: 4 %}
{% render 'product-card', product: product %}
{% endfor %}
{% endfor %}自定义过滤器模拟
<!-- 模拟 map_where 功能 -->
{% assign sale_prices = "" %}
{% for product in collection.products %}
{% if product.compare_at_price > product.price %}
{% if sale_prices == "" %}
{% assign sale_prices = product.price %}
{% else %}
{% assign sale_prices = sale_prices | append: "," | append: product.price %}
{% endif %}
{% endif %}
{% endfor %}
{% assign sale_prices_array = sale_prices | split: "," %}
<!-- 模拟 find 功能 -->
{% assign featured_product = null %}
{% for product in collection.products %}
{% if product.tags contains 'featured' %}
{% assign featured_product = product %}
{% break %}
{% endif %}
{% endfor %}
<!-- 模拟 count_by 功能 -->
{% assign vendor_counts = "" %}
{% assign unique_vendors = collection.products | map: 'vendor' | uniq %}
{% fo...解锁完整内容
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3. 错误处理
<!-- 安全的对象访问 -->
{% if product and product.featured_image %}
<img src="{{ product.featured_image | img_url: '400x400' }}"
alt="{{ product.featured_image.alt | default: product.title | escape }}">
{% else %}
<div class="no-image-placeholder">
<span>暂无图片</span>
</div>
{% endif %}
<!-- 回退机制 -->
{% assign primary_collection = collections[settings.featured_collection] %}
{% assign fallback_collection = collections.all %}
{% assign display_collection = primary_collection | default: fallback_collection %}下一步学习
掌握高级 Liquid 技巧后,建议继续学习:
高级技巧的掌握需要在实际项目中不断练习和应用,结合业务需求创造出更加优秀的用户体验!
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