mirror of
https://github.com/discourse/discourse.git
synced 2024-11-29 11:44:44 +08:00
25 lines
1.3 KiB
Ruby
25 lines
1.3 KiB
Ruby
class DenormalizeExpressions < ActiveRecord::Migration
|
|
def change
|
|
|
|
# Denormalizing this makes our queries so, so, so much nicer
|
|
|
|
add_column :posts, :expression1_count, :integer, null: false, default: 0
|
|
add_column :posts, :expression2_count, :integer, null: false, default: 0
|
|
add_column :posts, :expression3_count, :integer, null: false, default: 0
|
|
add_column :posts, :expression4_count, :integer, null: false, default: 0
|
|
add_column :posts, :expression5_count, :integer, null: false, default: 0
|
|
|
|
add_column :forum_threads, :expression1_count, :integer, null: false, default: 0
|
|
add_column :forum_threads, :expression2_count, :integer, null: false, default: 0
|
|
add_column :forum_threads, :expression3_count, :integer, null: false, default: 0
|
|
add_column :forum_threads, :expression4_count, :integer, null: false, default: 0
|
|
add_column :forum_threads, :expression5_count, :integer, null: false, default: 0
|
|
|
|
(1..5).each do |i|
|
|
execute "update posts set expression#{i}_count = (select count(*) from expressions where parent_id = posts.id and expression_type_id = #{i})"
|
|
execute "update forum_threads set expression#{i}_count = (select sum(expression#{i}_count) from posts where forum_thread_id = forum_threads.id)"
|
|
end
|
|
end
|
|
|
|
end
|