discourse/app/models/category_featured_topic.rb

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class CategoryFeaturedTopic < ActiveRecord::Base
belongs_to :category
belongs_to :topic
# Populates the category featured topics
def self.feature_topics
transaction do
current = {}
CategoryFeaturedTopic.select(:topic_id, :category_id).order(:rank).each do |f|
(current[f.category_id] ||= []) << f.topic_id
end
Category.select(:id, :topic_id).find_each do |c|
CategoryFeaturedTopic.feature_topics_for(c, current[c.id] || [])
CategoryFeaturedUser.feature_users_in(c.id)
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end
end
end
def self.feature_topics_for(c, existing=nil)
return if c.blank?
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query = TopicQuery.new(CategoryFeaturedTopic.fake_admin,
per_page: SiteSetting.category_featured_topics,
except_topic_ids: [c.topic_id],
visible: true,
no_definitions: true)
results = query.list_category_topic_ids(c).uniq
return if results == existing
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CategoryFeaturedTopic.transaction do
CategoryFeaturedTopic.delete_all(category_id: c.id)
if results
results.each_with_index do |topic_id, idx|
c.category_featured_topics.create(topic_id: topic_id, rank: idx)
end
end
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end
end
def self.fake_admin
# fake an admin
admin = User.new
admin.admin = true
admin.id = -1
admin
end
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end
# == Schema Information
#
# Table name: category_featured_topics
#
# category_id :integer not null
# topic_id :integer not null
# created_at :datetime not null
# updated_at :datetime not null
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# rank :integer default(0), not null
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# id :integer not null, primary key
#
# Indexes
#
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# cat_featured_threads (category_id,topic_id) UNIQUE
# index_category_featured_topics_on_category_id_and_rank (category_id,rank)
#