discourse/db/migrate/20140715190552_remove_uncat...

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class RemoveUncategorizedParents < ActiveRecord::Migration[4.2]
def up
uncat = execute("SELECT value FROM site_settings WHERE name = 'uncategorized_category_id'")
if uncat && uncat[0] && uncat[0]['value']
execute "UPDATE categories SET parent_category_id = NULL where id = #{uncat[0]['value'].to_i}"
end
end
def down
end
end