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8370b26cba
Old query used to scan the full topics table, on home page Instead we now perform 2 queries, one for pinned and one for unpinned and merge results in a 10x improvement on a 1 million topic DB
86 lines
2.3 KiB
Ruby
86 lines
2.3 KiB
Ruby
require_dependency 'avatar_lookup'
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class TopicList
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include ActiveModel::Serialization
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attr_accessor :more_topics_url,
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:prev_topics_url,
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:draft,
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:draft_key,
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:draft_sequence,
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:filter,
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:for_period,
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:per_page
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def initialize(filter, current_user, topics, opts=nil)
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@filter = filter
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@current_user = current_user
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@topics_input = topics
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@opts = opts || {}
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end
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def preload_key
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if @opts[:category]
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c = Category.where(id: @opts[:category_id]).first
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return "topic_list_#{c.url.sub(/^\//, '')}/l/#{@filter}" if c
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end
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"topic_list_#{@filter}"
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end
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# Lazy initialization
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def topics
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return @topics if @topics.present?
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@topics = @topics_input
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# Attach some data for serialization to each topic
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@topic_lookup = TopicUser.lookup_for(@current_user, @topics) if @current_user
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post_action_type =
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if @current_user
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if @opts[:filter].present?
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if @opts[:filter] == "bookmarked"
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PostActionType.types[:bookmark]
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elsif @opts[:filter] == "liked"
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PostActionType.types[:like]
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end
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end
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end
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# Include bookmarks if you have bookmarked topics
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if @current_user && !post_action_type
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post_action_type = PostActionType.types[:bookmark] if @topic_lookup.any?{|_,tu| tu && tu.bookmarked}
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end
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# Data for bookmarks or likes
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post_action_lookup = PostAction.lookup_for(@current_user, @topics, post_action_type) if post_action_type
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# Create a lookup for all the user ids we need
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user_ids = []
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@topics.each do |ft|
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user_ids << ft.user_id << ft.last_post_user_id << ft.featured_user_ids << ft.allowed_user_ids
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end
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avatar_lookup = AvatarLookup.new(user_ids)
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@topics.each do |ft|
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ft.user_data = @topic_lookup[ft.id] if @topic_lookup.present?
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if ft.user_data && post_action_lookup && actions = post_action_lookup[ft.id]
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ft.user_data.post_action_data = {post_action_type => actions}
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end
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ft.posters = ft.posters_summary(avatar_lookup: avatar_lookup)
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ft.participants = ft.participants_summary(avatar_lookup: avatar_lookup, user: @current_user)
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ft.topic_list = self
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end
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@topics
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end
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def attributes
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{'more_topics_url' => page}
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end
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end
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