Matchu
1ce32e5867
We used get_multi when preparing the proxies to decide which to load from the database, but then sent multiple get requests to Memcache to re-fetch the same data from that get_multi. Silly! Use the data that's already stored on the proxy anyway.
50 lines
No EOL
1.5 KiB
Ruby
50 lines
No EOL
1.5 KiB
Ruby
class Item
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class ProxyArray < Array
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# TODO: do we really need to include translations? The search documents
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# know the proper name for each locale, so proxies can tell their
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# parent items what their names are and save the query entirely.
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SCOPES = HashWithIndifferentAccess.new({
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method: {
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as_json: Item.includes(:translations),
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},
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partial: {
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item_link_partial: Item.includes(:translations)
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}
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})
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def initialize(items_or_ids)
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self.replace(items_or_ids.map { |item_or_id| Proxy.new(item_or_id) })
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end
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def prepare_method(name)
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prepare(:method, name)
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end
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def prepare_partial(name)
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prepare(:partial, name)
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end
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private
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def prepare(type, name)
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item_scope = SCOPES[type][name]
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raise "unexpected #{type} #{name.inspect}" unless item_scope
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# Try to read all values from the cache in one go, setting the proxy
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# values as we go along. Delete successfully set proxies, so that
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# everything left in proxies_by_key in the end is known to be a miss.
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proxies_by_key = {}
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self.each { |p| proxies_by_key[p.fragment_key(type, name)] = p }
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Rails.cache.read_multi(*proxies_by_key.keys).each { |k, v|
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proxies_by_key.delete(k).set_known_output(type, name, v)
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}
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missed_proxies = proxies_by_key.values
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missed_proxies_by_id = missed_proxies.index_by(&:id)
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item_scope.find(missed_proxies_by_id.keys).each do |item|
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missed_proxies_by_id[item.id].item = item
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end
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end
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end
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end |