forked from OpenNeo/impress
Drastically reduce queries for item page preview
Oh right okay, I made a sloppy perf hack long ago, and now let's actually clean it up!
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2 changed files with 13 additions and 7 deletions
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@ -555,10 +555,10 @@ class Item < ApplicationRecord
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# Otherwise, create an appearance for each real (nonzero) body ID. We don't
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# generally expect body_id = 0 and body_id != 0 to mix, but if they do,
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# uhh, let's merge the body_id = 0 ones in?
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species_by_body_id = Species.with_body_ids(swf_assets_by_body_id.keys)
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swf_assets_by_body_id.map do |body_id, body_specific_assets|
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swf_assets_for_body = body_specific_assets + swf_assets_for_all_bodies
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species = Species.with_body_id(body_id).first!
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body = Appearance::Body.new(body_id, species)
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body = Appearance::Body.new(body_id, species_by_body_id[body_id])
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Appearance.new(self, body, swf_assets_for_body)
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end
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end
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@ -3,11 +3,6 @@ class Species < ApplicationRecord
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has_many :alt_styles
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scope :alphabetical, -> { order(:name) }
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scope :with_body_id, -> body_id {
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pt = PetType.arel_table
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joins(:pet_types).where(pt[:body_id].eq(body_id)).limit(1)
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}
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def as_json(options={})
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super({only: [:id, :name], methods: [:human_name]}.merge(options))
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@ -20,4 +15,15 @@ class Species < ApplicationRecord
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I18n.translate('species.default_human_name')
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end
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end
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# Given a list of body IDs, return a hash from body ID to Species.
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# (We assume that each body ID belongs to just one species; if not, which
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# species we return for that body ID is undefined.)
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def self.with_body_ids(body_ids)
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species_ids_by_body_id = PetType.where(body_id: body_ids).distinct.
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pluck(:body_id, :species_id).to_h
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species_by_id = Species.where(id: species_ids_by_body_id.values).
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to_h { |s| [s.id, s] }
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species_ids_by_body_id.transform_values { |id| species_by_id[id] }
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end
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end
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