discourse/lib/topic_query_sql.rb

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#
# SQL fragments used when querying a list of topics.
#
module TopicQuerySQL
class << self
def lowest_date
"2010-01-01"
end
def order_by_category_sql(dir)
"CASE WHEN categories.id = #{SiteSetting.uncategorized_category_id.to_i} THEN '' ELSE categories.name END #{dir}"
end
# If you've clearned the pin, use bumped_at, otherwise put it at the top
def order_with_pinned_sql
"CASE
WHEN (COALESCE(topics.pinned_at, '#{lowest_date}') > COALESCE(tu.cleared_pinned_at, '#{lowest_date}'))
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THEN topics.pinned_at + interval '9999 years'
ELSE topics.bumped_at
END DESC"
end
# If you've clearned the pin, use bumped_at, otherwise put it at the top
def order_nocategory_with_pinned_sql
"CASE
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WHEN topics.pinned_globally
AND (COALESCE(topics.pinned_at, '#{lowest_date}') > COALESCE(tu.cleared_pinned_at, '#{lowest_date}'))
THEN topics.pinned_at + interval '9999 years'
ELSE topics.bumped_at
END DESC"
end
def order_basic_bumped
"CASE WHEN (topics.pinned_at IS NOT NULL) THEN 0 ELSE 1 END, topics.bumped_at DESC"
end
def order_nocategory_basic_bumped
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"CASE WHEN topics.pinned_globally AND (topics.pinned_at IS NOT NULL) THEN 0 ELSE 1 END, topics.bumped_at DESC"
end
def order_top_for(score)
"COALESCE(top_topics.#{score}, 0) DESC, topics.bumped_at DESC"
end
def order_top_with_pinned_category_for(score)
# display pinned topics first
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"CASE WHEN (COALESCE(topics.pinned_at, '#{lowest_date}') > COALESCE(tu.cleared_pinned_at, '#{lowest_date}')) THEN 0 ELSE 1 END,
top_topics.#{score} DESC,
topics.bumped_at DESC"
end
end
end