method
cache_collection_render
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Class: CollectionCaching
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cache_collection_render(instrumentation_payload, view, template, collection)
private
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# File actionview/lib/action_view/renderer/partial_renderer/collection_caching.rb, line 20 def cache_collection_render(instrumentation_payload, view, template, collection) return yield(collection) unless will_cache?(@options, view) collection_iterator = collection # Result is a hash with the key represents the # key used for cache lookup and the value is the item # on which the partial is being rendered keyed_collection, ordered_keys = collection_by_cache_keys(view, template, collection) # Pull all partials from cache # Result is a hash, key matches the entry in # `keyed_collection` where the cache was retrieved and the # value is the value that was present in the cache cached_partials = collection_cache.read_multi(*keyed_collection.keys) instrumentation_payload[:cache_hits] = cached_partials.size # Extract the items for the keys that are not found collection = keyed_collection.reject { |key, _| cached_partials.key?(key) }.values rendered_partials = collection.empty? ? [] : yield(collection_iterator.from_collection(collection)) index = 0 keyed_partials = fetch_or_cache_partial(cached_partials, template, order_by: keyed_collection.each_key) do # This block is called once # for every cache miss while preserving order. rendered_partials[index].tap { index += 1 } end ordered_keys.map do |key| keyed_partials[key] end end