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在我的 rails 应用程序中,我有categories基于location. 我想通过使用jsonapi-serializer's 缓存方法在序列化程序级别缓存这些类别cache_options store: Rails.cache, namespace: 'jsonapi-serializer', expires_in: 3.hours。这里的问题是,当我第一次调用它来检索类别时City A,例如然后稍后尝试从中检索类别City B仍然会显示City A的数据。我现在要做的是传递city给序列化程序,然后将其添加到namespace使用类似的东西namespace: "jsonapi-serializer/categories/#{:city}"以区分它们,但我还没有找到这样做的方法。

目前我有这段代码可以categories根据位置检索,然后序列化并呈现一个 json

      category = Category.active_categories(headers['User-Location'])

      unless category.empty?
        generic_category = Category.all_category
        categories = generic_category, category
        render CategorySerializer.new(categories.flatten, { params: { user_location: headers['User-Location'] } })
      end

WhileCategory.active_categoriesCategory.all_category正在缓存查询,如下所示:

active_categories:

def self.active_categories(user_location)
  Rails.cache.fetch("active_categories/#{user_location}", expires_in: 3.hours) do
    Category.where(status: 'active')
            .joins(:sellers).where(sellers: { status: 'active', is_validated: true })
            .joins(sellers: :cities).where(cities: { name_en: user_location })
            .joins(sellers: :products).where(products: { status: 'available' })
            .where.not(products: { quantity: 0 }).with_attached_cover
            .order(featured: :desc).uniq.to_a
  end
end

all_category:

def self.all_category
Rails.cache.fetch('all_category', expires_in: 24.hours) do
  Category.where(name_en: 'All').with_attached_cover.first
  end
end
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1 回答 1

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已经找到解决方案了。只需覆盖缓存方法,如下例所示:

require 'active_support/cache'

class MySerializer
  include JSONAPI::Serializer

  cache_options(store: Rails.cache, namespace: 'jsonapi-serializer', expires_in: 3.hours)

  def self.record_cache_options(options, fieldset, include_list, params)
    return super(options, fieldset, include_list, params) if params[:user_location].blank?
    opts = options.dup
    opts[:namespace] += ':' + params[:user_location]
    opts
  end
end
于 2020-11-19T01:22:17.837 回答