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The intent from day one was to keep MAX_TO_KEEP stylesheets per target however the DELETE statement did not perform target filtering This meant we often deleted the wrong stylesheets from the cache
62 lines
1.5 KiB
Ruby
62 lines
1.5 KiB
Ruby
class StylesheetCache < ActiveRecord::Base
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self.table_name = 'stylesheet_cache'
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MAX_TO_KEEP = 50
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def self.add(target, digest, content, source_map, max_to_keep: nil)
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max_to_keep ||= MAX_TO_KEEP
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old_logger = ActiveRecord::Base.logger
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return false if where(target: target, digest: digest).exists?
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if Rails.env.development?
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ActiveRecord::Base.logger = nil
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end
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success = create(target: target, digest: digest, content: content, source_map: source_map)
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count = StylesheetCache.count
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if count > max_to_keep
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remove_lower = StylesheetCache
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.where(target: target)
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.limit(max_to_keep)
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.order('id desc')
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.pluck(:id)
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.last
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DB.exec(<<~SQL, id: remove_lower, target: target)
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DELETE FROM stylesheet_cache
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WHERE id < :id AND target = :target
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SQL
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end
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success
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rescue ActiveRecord::RecordNotUnique
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false
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ensure
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if Rails.env.development? && old_logger
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ActiveRecord::Base.logger = old_logger
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end
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end
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end
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# == Schema Information
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#
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# Table name: stylesheet_cache
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#
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# id :integer not null, primary key
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# target :string not null
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# digest :string not null
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# content :text not null
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# created_at :datetime not null
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# updated_at :datetime not null
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# theme_id :integer default(-1), not null
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# source_map :text
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#
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# Indexes
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#
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# index_stylesheet_cache_on_target_and_digest (target,digest) UNIQUE
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#
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