discourse/db/migrate/20140815183851_fix_index_on...

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# frozen_string_literal: true
class FixIndexOnPostActions < ActiveRecord::Migration[4.2]
def change
execute "UPDATE post_actions SET targets_topic = false WHERE targets_topic IS NULL"
change_column :post_actions, :targets_topic, :boolean, default: false, null: false
execute "
DELETE FROM post_actions pa
USING post_actions x
WHERE pa.user_id = x.user_id AND
pa.post_action_type_id = x.post_action_type_id AND
pa.post_id = x.post_id AND
pa.targets_topic = x.targets_topic AND
pa.id < x.id AND
pa.deleted_at IS NULL AND
x.deleted_at IS NULL
"
remove_index "post_actions", name: "idx_unique_actions"
add_index "post_actions",
%w[user_id post_action_type_id post_id targets_topic],
name: "idx_unique_actions",
unique: true,
where: "deleted_at IS NULL"
end
end