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
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Category.all.each do |c|
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feature_topics_for(c)
CategoryFeaturedUser.feature_users_in(c)
end
end
end
def self.feature_topics_for(c)
return if c.blank?
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CategoryFeaturedTopic.transaction do
exec_sql "DELETE FROM category_featured_topics WHERE category_id = :category_id", category_id: c.id
exec_sql "INSERT INTO category_featured_topics (category_id, topic_id, created_at, updated_at)
SELECT :category_id,
ft.id,
CURRENT_TIMESTAMP,
CURRENT_TIMESTAMP
FROM topics AS ft
WHERE ft.category_id = :category_id
AND ft.visible
AND ft.deleted_at IS NULL
AND ft.archetype <> '#{Archetype.private_message}'
ORDER BY ft.bumped_at DESC
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LIMIT :featured_limit",
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category_id: c.id,
featured_limit: SiteSetting.category_featured_topics
end
end
end