discourse/lib/topic_query_sql.rb

61 lines
1.9 KiB
Ruby

#
# SQL fragments used when querying a list of topics.
#
module TopicQuerySQL
class << self
# use the constants in conjuction with COALESCE to determine the order with regard to pinned
# topics that have been cleared by the user. There might be a cleaner way to do this.
def lowest_date
"2010-01-01"
end
def highest_date
"3000-01-01"
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}'))
THEN '#{highest_date}'
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
WHEN topics.pinned_globally and (COALESCE(topics.pinned_at, '#{lowest_date}') > COALESCE(tu.cleared_pinned_at, '#{lowest_date}'))
THEN '#{highest_date}'
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
"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
"CASE WHEN COALESCE(topics.pinned_at, '#{lowest_date}') > COALESCE(tu.cleared_pinned_at, '#{lowest_date}') THEN 1 ELSE 0 END DESC,
top_topics.#{score} DESC,
topics.bumped_at DESC"
end
end
end