我正在使用Shopify并希望minicart显示产品/商品的数量，而不是购物车的总数。例如，如果我卖3米的一种面料，然后是4米的另一种面料，那么就说2而不是7。
我已设法使用cart.items.size（而不是cart.item_count）修改标头编码，这在页面首次加载时工作正常。但是，如果我在产品页面上并添加产品，则迷你购物车会更新，但它会再次计算总数，而不是织物数量。如果我刷新页面，那就再好了。
我已经尝试编辑javascript来读取cart.items.size而不是cart.item_count，但它只是提出了＆＃39; undefined＆＃39;将商品添加到购物车时。
我没有编辑javascript的经验，所以有人可以指出我正确的方向。如果您需要任何额外的代码或信息，请说出来，如果我错过任何事情，请道歉。
以下是正在运行的标头代码：
<div class="mini-cart-wrap" href="#">
{% if settings.cart-icon == "cart" %}
{% include 'icon' with 'cart' %}
{% else %}
{% include 'icon' with 'bag' %}
{% endif %}
<label><span class="item-count">{{ cart.items.size }}</span> {{ 'layout.header.item_count' | t: count: cart.items.size }}</label>
<div class="mini-cart {% if shop.customer_accounts_enabled %}account-enabled{% endif %} {% if cart.items.size == 0 %}empty-cart{% endif %}">
<div class="arrow"></div>
<div class="mini-cart-items-wrap">
<p class="no-items">{{ 'layout.header.no_items' | t }}</p>
{% for item in cart.items %}
<div id="item-{{ item.id }}" class="item clearfix">
<div class="image-wrap">
<img alt="{{ item.product.title }}" src="{{ item | img_url: 'small' }}">
<a class="{% if settings.product-image-borders %}overlay{% endif %}" href="{{ item.url }}"></a>
</div>
<div class="details">
{% if settings.show-brand-names %}
<p class="brand">{{ item.vendor | link_to_vendor }}</p>
{% endif %}
<p class="title"><a href="{{ item.url }}">{{ item.product.title }}</a><span class="quantity">× <span class="count">{{ item.quantity }}</span></span></p>
<p class="price"><span class="money">{{ item.line_price | money }}</span></p>
{% unless item.variant.title == 'Default Title' %}<p class="variant">{{ item.variant.title }}</p>{% endunless %}
{% if item.properties %}
{% for property in item.properties %}
{% unless property.last == blank %}
<p class="property">
<span class="property-label">{{ property.first }}:</span>
{% if property.last contains '/uploads/' %}
<a class="property-image" href="{{ property.last }}">{{ property.last | split: '/' | last }}</a>
{% else %}
<span class="property-value">{{ property.last }}</span>
{% endif %}
</p>
{% endunless %}
{% endfor %}
{% endif %}
</div>
</div>
{% endfor %}
</div>
<div class="options clearfix">
<a class="action-button view-cart desaturated" href="/cart">{{ 'layout.header.view_cart' | t }}</a>
<a class="action-button checkout" href="/checkout">{{ 'layout.header.checkout' | t }}</a>
</div>
</div>
</div>
这是当前的javascript（未经编辑）
ProductView.prototype.updateMiniCart = function(cart) {
var i, item, itemProperties, itemText, j, len, miniCartItemsWrap, productPrice, propertiesArray, propertyKeysArray, ref, variant;
miniCartItemsWrap = $(".mini-cart-items-wrap");
miniCartItemsWrap.empty();
if (cart.item_count !== 1) {
itemText = Theme.cartItemsOther;
} else {
itemText = Theme.cartItemsOne;
$(".mini-cart .options").show();
miniCartItemsWrap.find(".no-items").hide();
}
$(".mini-cart-wrap label").html("<span class='item-count'>" + cart.item_count + "</span> " + itemText);
ref = cart.items;
for (j = 0, len = ref.length; j < len; j++) {
item = ref[j];
productPrice = Shopify.formatMoney(item.line_price, Theme.moneyFormat);
variant = item.variant_title ? "<p class='variant'>" + item.variant_title + "</p>" : "";
itemProperties = "";
if (item.properties) {
propertyKeysArray = Object.keys(item.properties);
propertiesArray = _.values(item.properties);
i = 0;
while (i < propertyKeysArray.length) {
if (propertiesArray[i].length) {
itemProperties = itemProperties + ("<p class=\"property\">\n <span class=\"property-label\">" + propertyKeysArray[i] + ":</span>\n <span class=\"property-value\">" + propertiesArray[i] + "</span>\n</p>");
}
i++;
}
}
miniCartItemsWrap.append("<div id=\"item-" + item.variant_id + "\" class=\"item clearfix\">\n <div class=\"image-wrap\">\n <img alt=\"" + item.title + "\" src=\"" + item.image + "\">\n <a class=\"overlay\" href=\"" + item.url + "\"></a>\n </div>\n <div class=\"details\">\n <p class=\"brand\">" + item.vendor + "</p>\n <p class=\"title\"><a href=\"" + item.url + "\">" + item.product_title + "</a><span class=\"quantity\">× <span class=\"count\">" + item.quantity + "</span></span></p>\n <p class=\"price\"><span class=\"money\">" + productPrice + "</span></p>\n " + variant + "\n " + itemProperties + "\n </div>\n</div>");
}
if (Theme.currencySwitcher) {
return $(document.body).trigger("switch-currency");
}
};
以及此处（快速查看）
ProductView.prototype.updateMiniCart = function(cart) {
var i, item, itemProperties, itemText, j, len, miniCartItemsWrap, productPrice, propertiesArray, propertyKeysArray, ref, variant;
miniCartItemsWrap = $(".mini-cart-items-wrap");
miniCartItemsWrap.empty();
if (cart.item_count !== 1) {
itemText = Theme.cartItemsOther;
} else {
itemText = Theme.cartItemsOne;
$(".mini-cart .options").show();
miniCartItemsWrap.find(".no-items").hide();
}
$(".mini-cart-wrap label").html("<span class='item-count'>" + cart.item_count + "</span> " + itemText);
ref = cart.items;
for (j = 0, len = ref.length; j < len; j++) {
item = ref[j];
productPrice = Shopify.formatMoney(item.line_price, Theme.moneyFormat);
variant = item.variant_title ? "<p class='variant'>" + item.variant_title + "</p>" : "";
itemProperties = "";
if (item.properties) {
propertyKeysArray = Object.keys(item.properties);
propertiesArray = _.values(item.properties);
i = 0;
while (i < propertyKeysArray.length) {
if (propertiesArray[i].length) {
itemProperties = itemProperties + ("<p class=\"property\">\n <span class=\"property-label\">" + propertyKeysArray[i] + ":</span>\n <span class=\"property-value\">" + propertiesArray[i] + "</span>\n</p>");
}
i++;
}
}
miniCartItemsWrap.append("<div id=\"item-" + item.variant_id + "\" class=\"item clearfix\">\n <div class=\"image-wrap\">\n <img alt=\"" + item.title + "\" src=\"" + item.image + "\">\n <a class=\"overlay\" href=\"" + item.url + "\"></a>\n </div>\n <div class=\"details\">\n <p class=\"brand\">" + item.vendor + "</p>\n <p class=\"title\"><a href=\"" + item.url + "\">" + item.product_title + "</a><span class=\"quantity\">× <span class=\"count\">" + item.quantity + "</span></span></p>\n <p class=\"price\"><span class=\"money\">" + productPrice + "</span></p>\n " + variant + "\n " + itemProperties + "\n </div>\n</div>");
}
if (Theme.currencySwitcher) {
return $(document.body).trigger("switch-currency");
}
};
答案 0 :(得分：0)
Liquid使用array.size来确定数组的大小。这就是为什么你的标题正在使用你的Liquid模板。
另一方面，JavaScript使用array.length来确定数组的大小。尝试使用cart.items.size
cart.items.length