ruby on rails - Convert query from SQL to ActiveRecord -

how can same result using activerecord?

select categories.* categories inner join levels on levels.id = categories.level_id levels.description <= "medium" 

it's hard precise without more details, should that:

category.joins(:level).where('levels.description <= "medium"') 

i think should trick:

category.joins(:level).where(level.arel_table[:description].lteq('medium'))