如何自定义jsonapi序列化程序缓存命名空间-RubyonRails



在我的rails应用程序中,我有基于location分类的categories。我想使用jsonapi-serializer的缓存方法cache_options store: Rails.cache, namespace: 'jsonapi-serializer', expires_in: 3.hours在序列化程序级别缓存这些类别。这里的问题是,例如,当我第一次调用它来检索City A中的类别,然后尝试从City B中检索类别时,它仍然会显示City A的数据。我现在要做的是将city传递给序列化程序,然后使用类似于namespace: "jsonapi-serializer/categories/#{:city}"的东西将其添加到namespace中,以便区分它们,但我还找不到这样做的方法。

目前,我有这段代码可以根据位置检索categories,然后序列化并呈现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

Category.active_categoriesCategory.all_category缓存查询时,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

已找到解决方案。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

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